See the section Configuring DPD for an Easy VPN Remote. Enable the device to use dead peer detection (DPD). This command can be repeated multiple times. keepalive there is three vSRX (12.1X47-D20.7) in my test lab. If you do not specify a time interval, an error message appears. Use Cisco Feature Navigator to find information about platform support and Cisco software image support. client With the IPsec Dead Peer Detection Periodic Message Option feature, you can configure your router so that DPD messages are "forced" at regular intervals. The benefit of IOS keepalives and periodic DPD is earlier detection of dead peers. 3. The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. {auto | manual}, 5. The commands in this article will help to configure DPD (dead peer detection) on IPsec VPN. {host-name [dynamic] | ip-address}, 5. keepalive command with the An implementation might even define the DPD messages to be at regular intervals following idle periods. A hostname can be specified only when the router has a DNS server available for host-name resolution. The No new or modified standards are supported by this feature, and support for existing standards has not been modified by this feature. A listing of Cisco's trademarks can be found at For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. This informational document describes the current practice of those implementations. The following table provides release information about the feature or features described in this module. seconds 2. In this example, an SA could be set up to the IPsec peer at 10.0.0.1, 10.0.0.2, or 10.0.0.3. The following sample output from the debug crypto isakmp command verifies that IKE DPD is enabled: To see that IKE DPD is enabled (and that the peer supports DPD): when periodic DPD is enabled, you should see the following debug messages at the interval specified by the command: The above message corresponds to sending the DPD R_U_THERE message. Dead Peer Detection ( DPD) is a method that allows detection of unreachable Internet Key Exchange (IKE) peers. See the section Configuring DPD for an Easy VPN Remote section. Five aggressive DPD retry messages can be missed before the tunnel is marked as down. 11-07-2017 Implementations that support DPD include the Cisco VPN 3000 concentrator, Cisco PIX Firewall, Cisco VPN Client, and Cisco IOS software in all modes of operation--site-to-site, Easy VPN remote, and Easy VPN server. It is important to note that the decision about when to initiate a DPD exchange is implementation specific. [local ip-address [port local-port]] [remote ip-address [port remote-port]] | [fvrf vrf-name] [ivrf vrf-name], 3. www.cisco.com/go/trademarks. Description Sets dead peer detection options when dead peer detection has been enabled with the initiate-dead-peer-detection command. Hello. You can specify multiple peers by repeating this command. 1. top router (routing between two routers) Interfaces. The debug crypto isakmp command can be used to verify that DPD is enabled. An account on Cisco.com is not required. Manually establishes and terminates an IPsec VPN tunnel on demand. The following example shows that DPD is used in conjunction with multiple peers in an Easy VPN remote configuration. Router (config-crypto-ezvpn)# mode client. Dead Peer Detection (DPD) refers to functionality documented in RFC 3706, which is a method of detecting dead Internet Key Exchange (IKE/Phase1) peers.Tunnel Monitoring is a Palo Alto Networks proprietary feature that verifies traffic is successfully passing across the IPSec tunnel in question by sending a PING down the tunnel to the configured destination. [retry-seconds] [periodic | on-demand], Router (config)# crypto isakmp keepalive 10 periodic. debug If the peer fails to respond to the DPD R_U_THERE message, the router will resend the message every 20 seconds (four transmissions altogether). retry-seconds Specifically, DPD is negotiated via an exchange of the DPDISAKMP Vendor IDpayload, which is sent in the ISAKMP MM messages 3 and 4 or ISAKMP AM messages 1 and 2. Sets the peer IP address or host name for the VPN connection. Finding Feature Information transform-set-name, 6. http://www.cisco.com/cisco/web/support/index.html. crypto name, 4. configure Before configuring the IPsec Dead Peer Detection Periodic Message Option feature, you should have the following: Familiarity with configuring IP Security (IPsec). Specifies the VPN mode of operation of the router. address {ipaddress | hostname}, Router (config)# crypto ipsec client ezvpn ezvpn-config1. The benefit of this approach over the default approach (on-demand dead peer detection) is earlier detection of dead peers. www.cisco.com/go/cfn. You can specify multiple peers by repeating this command. The problem with current heartbeat and keepalive proposals is their reliance upon their messages to be sent at regular intervals. The benefit of this approach over the default approach (on-demand dead peer detection) is earlier detection of dead peers. Third-party trademarks mentioned are the property of their respective owners. crypto DPD allows the router to clear the IKE state when a peer becomes unreachable. The values clear, hold, and restart all activate DPD and determine the action to perform on a timeout. During IPsec tunnel creation, VPN peers will negotiate to decide whether to use DPD or not. Sets the peer IP address or host name for the VPN connection. Enters crypto map configuration mode and creates or modifies a crypto map entry. For example, if a router has no traffic to send, a DPD message is still sent at regular intervals, and if a peer is dead, the router does not have to wait until the IKE SA times out to find out. Implementations that support DPD include the Cisco VPN 3000 concentrator, Cisco PIX Firewall, Cisco VPN Client, and Cisco IOS XE software in all modes of operation--site-to-site, Easy VPN remote, and Easy VPN server. On the FortiGate, DPD can be configured as follows: # set dpd. crypto Specifies which transform sets can be used with the crypto map entry. seq-num set IKEv2 and Dead Peer Detection. Specifies the group name and key value for the Virtual Private Network (VPN) connection. key name, 4. When the on-demand keyword is used, this argument is the number of seconds during which traffic is not received from the peer before DPD retry messages are sent if there is data (IPSec) traffic to send; the range is from 10 to 3600 seconds. transform-set Manually establishes and terminates an IPsec VPN tunnel on demand. To view a list of Cisco trademarks, go to this URL: The above message corresponds to receiving the acknowledge (ACK) message from the peer. To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL: DPD conforms to the Internet draft draft-ietf-ipsec-dpd-04.txt, which is pending publication as an Informational RFC (a number has not yet been assigned). As such, the SAs can remain until their lifetimes naturally expire, resulting in a black hole situation where packets are tunneled to oblivion. crypto This table lists only the software release that introduced support for a given feature in a given software release train. Five aggressive DPD retry messages can be missed before the tunnel is marked as down. DPD also has an on-demand approach. periodic crypto If the peer fails to respond to the DPD R_U_THERE message, the router resends the message every 20 seconds (four transmissions altogether). 3. Finding Feature Information www.cisco.com/go/cfn. disable <----- Disable Dead Peer Detection. Specifies which transform sets can be used with the crypto map entry. keepalive. After some number of retransmitted messages, an implementation should assume its peer to be unreachable and delete IPSec and IKE SAs to the peer. peer If the timer is set for 10 seconds, the router sends a hello message every 10 seconds (unless, of course, the router receives a hello message from the peer). seq-num Specifies an IPsec peer in a crypto map entry. ipsec-isakmp, 4. The contrasting on-demand approach is the default. A device performs this verification by sending encrypted IKE Phase 1 notification payloads (R-U-THERE messages) to a peer and waiting for DPD acknowledgements (R-U-THERE-ACK messages) from the peer. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. --(Optional) The default behavior. All rights reserved. Use Cisco Feature Navigator to find information about platform support and Cisco software image support. connect isakmp If a peer is dead, and the router never has any traffic to send to the peer, the router does not discover this until the IKE or IPsec security association (SA) has to be rekeyed (the liveliness of the peer is unimportant if the router is not trying to communicate with the peer). For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Some articles and Websites ( Wikipedia and Cisco for instance) claim that unlike IKEv1, IKEv2 provides a support for Dead Peer Detection. In this example, an SA could be set up to the IPsec peer at 10.10.10.10, 10.2.2.2, or 10.3.3.3. isakmp. Before configuring the IPsec Dead Peer Detection Periodic Message Option feature, you should have the following: Using periodic DPD potentially allows the router to detect an unresponsive IKE peer with better response time when compared to on-demand DPD. Dead Peer Detection Periodic Message Option. ipsec-isakmp, 4. periodic keyword, the router defaults to the on-demand approach. This table lists only the software release that introduced support for a given feature in a given software release train. Periodic DPD Enabled Example. For example, if a router has no traffic to send, a DPD message is still sent at regular intervals, and if a peer is dead, the router does not have to wait until the IKE SA times out to find out. The default DPD retry message is sent every 2 seconds. connect crypto Once an IPsec/IKE policy is specified on a connection, the Azure VPN gateway will only send or accept the IPsec/IKE proposal with specified cryptographic algorithms and key strengths on that particular connection. Specifies an extended access list for a crypto map entry. transform-set On the other hand, if the router has traffic to send to the peer, and the peer does not respond, the router will initiate a DPD message to determine the state of the peer. Prerequisites for IPsec Dead Peer Detection PeriodicMessage Option, Restrictions for IPsec Dead Peer Detection PeriodicMessage Option, Information About IPsec Dead Peer DetectionPeriodic Message Option, How DPD and Cisco IOS Keepalive Features Work, Using the IPsec Dead Peer Detection Periodic Message Option, Using DPD and Cisco IOS Keepalive Featureswith Multiple Peers in the Crypto Map, Using DPD in an Easy VPN Remote Configuration, How to Configure IPsec Dead Peer Detection PeriodicMessage Option, Configuring DPD and Cisco IOS Keepalives with Multiple Peersin the Crypto Map, Configuration Examples for IPsec Dead Peer DetectionPeriodic Message Option, Site-to-Site Setup with Periodic DPD Enabled Example, Easy VPN Remote with DPD Enabled Example, Verifying DPD Configuration Using the debug crypto isakmp Command Example, DPD and Cisco IOS Keepalives Used in Conjunction with Multiple Peers in a Crypto Map Example, DPD Used in Conjunction with Multiple Peers for an Easy VPN Remote Example, Feature Information for IPsec Dead Peer Detection Periodic Message Option, Site-to-Site Setup with Periodic DPD Enabled Example, Verifying DPD Configuration Using the debug crypto isakmp Command Example, DPD and Cisco IOS Keepalives Used in Conjunction with Multiple Peers in a Crypto Map Example, DPD Used in Conjunction with Multiple Peers for an Easy VPN Remote Example. isakmp If you do not configure the crypto The above message shows what happens when the remote peer is unreachable. Router (config-crypto-map)# set peer 10.12.12.12. Use Cisco Feature Navigator to find information about platform support and Cisco software image support. Starting in Junos OS Release 17.2R1, the dead-peer-detection options are also applicable to IKEv2 SAs. To access Cisco Feature Navigator, go to To this end, a number of vendors have implemented their own approach to detect peer liveliness without needing to send messages at regular intervals. keepalive command with the If DPD is enabled and the peer is unreachable for some time, you can use the clear crypto session command to manually clear IKE and IPsec SAs. DPD is described in the informational RFC 3706: "A Traffic-Based Method of Detecting Dead Internet Key Exchange (IKE) Peers" authored by G. Huang, S. Beaulieu, D. Rochefort. The IPsec Dead Peer Detection Periodic Message Option feature allows you to configure your router to query the liveliness of its Internet Key Exchange (IKE) peer at regular intervals. This problem of detecting a dead IKE peer has been addressed by proposals that require sending periodic HELLO/ACK messages to prove liveliness. session ASA may have nothing to send to the peer, but DPD is still sent if the peer is idle. crypto Dead Peer Detection (DPD) is the method to detect the aliveness of an IPsec connection. Creates a Cisco Easy VPN remote configuration and enters the Cisco Easy VPN Remote configuration mode. What is Dead Peer Detection (DPD)? The result of sending frequent messages is that the communicating peers must encrypt and decrypt more packets. In the implementation, this translates into managing some timer to service these message intervals. crypto DPD Requests are sent asISAKMP R-U-THEREmessages and DPD Responses are sent asISAKMP R-U-THERE-ACKmessages. key This asynchronous property of DPD exchanges allows fewer messages to be sent, and this is how DPD achieves greater scalability. map-name Sets dead peer detection options when dead peer detection has been enabled with the initiate-dead-peer-detection command. 2. On the other hand, if the router has traffic to send to the peer, and the peer does not respond, the router initiates a DPD message to determine the state of the peer. address A complete DPD exchange (i.e., transmission of R-U-THERE and receipt of corresponding R-U-THERE-ACK) will serve as proof of liveliness until the next idle period. If a peer is dead, and the router never has any traffic to send to the peer, the router will not find out until the IKE or IPsec security association (SA) has to be rekeyed (the liveliness of the peer is unimportant if the router is not trying to communicate with the peer). In implementations and installations where managing large numbers of simultaneous IKE sessions is of concern, these regular heartbeats/keepalives prove to be infeasible. ipsec If you configure multiple peers, the router will switch over to the next listed peer for a stateless failover. Dead Peer Detection kills IPsec after 3min Sebastian R over 4 years ago Hello guys, I just created first IPsec connection with my UTM. Specifies the VPN mode of operation of the router. Go to Site-to-site VPN > IPsec. IPsec Dead Peer Detection Periodic Message Option 12.3(7)T 12.2(33)SRA 12.2(33)SXH The IPsec Dead Peer Detection Periodic Message Option feature is used to configure the router to query the liveliness of its Internet Key Exchange (IKE) peer at regular intervals. With on-demand DPD, messages are sent on the basis of traffic patterns. {auto | manual}, 5. match address 101, Table 1Feature Information for Dead Peer Detection, IPsec Anti-Replay Window Expandingand Disabling, Invalid Security Parameter Index Recovery, IPsec Dead Peer Detection PeriodicMessage Option, DF Bit Override Functionality with IPsec Tunnels, Prerequisites for IPsec Dead Peer Detection PeriodicMessage Option, Restrictions for IPsec Dead Peer Detection PeriodicMessage Option, Information About IPsec Dead Peer DetectionPeriodic Message Option, How DPD and Cisco IOS XE Keepalive Features Work, Using the IPsec Dead Peer Detection Periodic Message Option, Using DPD and Cisco IOS XE Keepalive Featureswith Multiple Peers in the Crypto Map, Using DPD in an Easy VPN Remote Configuration, How to Configure IPsec Dead Peer Detection PeriodicMessage Option, Configuring DPD and Cisco IOS XE Keepalives with Multiple Peersin the Crypto Map, Configuration Examples for IPsec Dead Peer DetectionPeriodic Message Option, Site-to-Site Setup with Periodic DPD Enabled Example, Easy VPN Remote with DPD Enabled Example, Verifying DPD Configuration Using the debug crypto isakmp Command Example, DPD and Cisco IOS XE Keepalives Used in Conjunction with Multiple Peers in a Crypto Map Example, DPD Used in Conjunction with Multiple Peers for an Easy VPN Remote Example, Feature Information for Dead Peer DetectionPeriodic Message Option, Site-to-Site Setup with 3. DPD is a method used by devices to verify the current existence and availability of IPsec peers. DPD parameters are not negotiated by peers. IKEIKE SAIPsec SADPDDead Peer Detection IKEIKE SAIPsec SA When communicating to large numbers of IKE peers, you should consider using on-demand DPD instead. Allows the gateway to send DPD messages to the peer. The following example shows that DPD is used in conjunction with multiple peers in an Easy VPN remote configuration. The use of the word partner does not imply a partnership relationship between Cisco and any other company. The IPsec Dead Peer Detection Periodic Message Option feature is used to configure the router to query the liveliness of its Internet Key Exchange (IKE) peer at regular intervals. The following Dead Peer Detection DPD is a monitoring function used to determine liveliness of the Security-SA (Security Association and IKE, Phase 1) DPD is used to detect if the peer device still has a valid IKE-SA. DPD (Dead Peer Detection) IPsec () IPsec () . The result of sending frequent messages is that the communicating peers must encrypt and decrypt more packets. The following example shows that DPD is used in conjunction with multiple peers in an Easy VPN remote configuration. When communicating to large numbers of IKE peers, you should consider using on-demand DPD instead. The benefit of this approach over the default approach (on-demand dead peer detection) is earlier detection of dead peers. Specifies an extended access list for a crypto map entry. Enable the device to use dead peer detection (DPD). Solution You can configure DPD per phase1-interface as follows (default settings are shown): #config vpn ipsec phase1-interface edit <Tunnel Name> set dpd [disable | on-idle | on-demand] set dpd-retryinterval 20 set dpd-retrycount 3 next end DPD: In this example, an SA could be set up to the IPsec peer at 10.0.0.1, 10.0.0.2, or 10.0.0.3. DPD and IOS keepalive features can be used in conjunction with multiple peers in the crypto map to allow for stateless failover. ipsec-isakmp, 4. ezvpn map-name A hostname can be specified only when the router has a DNS server available for host-name resolution. Using periodic DPD potentially allows the router to detect an unresponsive IKE peer with better response time when compared to on-demand DPD. If a router has no traffic to send, it never sends a DPD message. The following example shows that DPD and Cisco IOS keepalives are used in conjunction with multiple peers in a crypto map configuration when IKE is used to establish the security associations (SAs). The default DPD retry message is sent every 2 seconds. The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies. 1. The benefit of this approach over the default approach (on-demand dead peer detection) is earlier detection of dead peers. The following command was introduced or modified: You can specify more than one transform set name by repeating this command. set interfaces ge-0/0/1 unit 0 family inet address 192.168.10.254/24 set interfaces ge-0/0/2 unit 0 family inet address 192.168.1.254/24 set interfaces ge-0/0/2 unit 0 family inet . Router (config-crypto-ezvpn)# mode client. Finding Feature Information configure ezvpn A keepalive timer of 10 seconds with 5 retries seems to work well with HA because of the time that it takes for the router to get into active mode. With on-demand DPD, messages are sent on the basis of traffic patterns. configure (1005R). For the latest feature information and caveats, see the release notes for your platform and software release. Unless noted otherwise, subsequent releases of that software release train also support that feature. A peer is free to request proof of liveliness when it needs it not at mandated intervals. Familiarity with configuring IP Security (IPsec). DPD is a method used by devices to verify the current existence and availability of IPsec peers. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental. To access Cisco Feature Navigator, go to You can specify multiple peers by repeating this command. An implementation can initiate a DPD exchange (i.e., send an R-U-THERE message) when there has been some period of idleness, followed by the desire to send outbound traffic. When two peers communicate with IKE [2] and IPSec [3], the situation may arise in which connectivity between the two goes down unexpectedly. on-demand <----- Trigger Dead Peer Detection when IPsec traffic is sent but no reply is received from the peer. DPD and Cisco IOS keepalives function on the basis of the timer. map If you do not specify a time interval, an error message appears. The above message shows what happens when the remote peer is unreachable. To configure a periodic DPD message, perform the following steps. If DPD is enabled and the peer is unreachable for some time, you can use the clear crypto session command to manually clear IKE and IPsec SAs. match crypto To access Cisco Feature Navigator, go to group-key, 6. To locate and download MIBs for selected platforms, Cisco IOS software releases, and feature sets, use Cisco MIB Locator found at the following URL: DPD conforms to the Internet draft draft-ietf-ipsec-dpd-04.txt, which is pending publication as an Informational RFC (a number has not yet been assigned). --(Optional) DPD messages are sent at regular intervals. An account on Cisco.com is not required. Almost everything is left to an implementation. The result of sending frequent messages is that the communicating peers must encrypt and decrypt more packets. Use Cisco Feature Navigator to find information about platform support and Cisco software image support. clear If you do not configure the The connection is established successfully (I can ping and transfer over vpn), but after ~3min the DeadPeerDetection kills the vpn, so it must be re-established. The following configurations are for a site-to-site setup with no periodic DPD enabled. Configure Dead peer detection in Cisco ASA firewall. DPD allows the router to detect a dead IKE peer, and when the router detects the dead state, the router deletes the IPsec and IKE SAs to the peer. Dead Peer Detection Interval - Enter the number of seconds between "heartbeats." The default value is 60 seconds. Manually establishes and terminates an IPsec VPN tunnel on demand. group The following configuration tells the router to send a periodic DPD message every 30 seconds. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password. configurations are for the IKE Phase 1 policy and for the IKE preshared key. See the section Configuring DPD for an Easy VPN Remote section. In this example, an SA could be set up to the IPsec peer at 10.0.0.1, 10.0.0.2, or 10.0.0.3. Router (config-crypto-ezvpn)# group unity key preshared. terminal, 3. The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. If the timer is set for 10 seconds, the router sends a "hello" message every 10 seconds (unless, of course, the router receives a "hello" message from the peer). Finding Feature Information IKEv2 IPSec tunnel is going down due to Dead Peer Detection (DPD). isakmp crypto map seconds The button should turn green, indicating that the connection is . Ikemgr.log (CLI: less mp-log ikemgr.log) indicating the tunnel going down due to DPD. These schemes tend to be unidirectional (a HELLO only) or bidirectional (a HELLO/ACK pair). keepalive The following configurations are for a site-to-site setup with no periodic DPD enabled. Specifies the group name and key value for the Virtual Private Network (VPN) connection. ASA and PIX firewalls support "semi-periodic" DPD only. Prerequisites for IPsec Dead Peer Detection PeriodicMessage Option, Restrictions for IPsec Dead Peer Detection PeriodicMessage Option, Information About IPsec Dead Peer DetectionPeriodic Message Option, How DPD and Cisco IOS Keepalive Features Work, Using the IPsec Dead Peer Detection Periodic Message Option, Using DPD and Cisco IOS Keepalive Featureswith Multiple Peers in the Crypto Map, Using DPD in an Easy VPN Remote Configuration, How to Configure IPsec Dead Peer Detection PeriodicMessage Option, Configuring DPD and Cisco IOS Keepalives with Multiple Peersin the Crypto Map, Configuration Examples for IPsec Dead Peer DetectionPeriodic Message Option, Site-to-Site Setup with Periodic DPD Enabled Example, Easy VPN Remote with DPD Enabled Example, Verifying DPD Configuration Using the debug crypto isakmp Command Example, DPD and Cisco IOS Keepalives Used in Conjunction with Multiple Peers in a Crypto Map Example, DPD Used in Conjunction with Multiple Peers for an Easy VPN Remote Example, Feature Information for IPsec Dead Peer Detection Periodic Message Option, Site-to-Site Setup with Periodic DPD Enabled Example, Verifying DPD Configuration Using the debug crypto isakmp Command Example, DPD and Cisco IOS Keepalives Used in Conjunction with Multiple Peers in a Crypto Map Example, DPD Used in Conjunction with Multiple Peers for an Easy VPN Remote Example. keepalive command is configured, the Cisco IOS software negotiates the use of Cisco IOS keepalives or DPD, depending on which protocol the peer supports. connect Enable IKE Dead Peer Detection: Select if you want inactive VPN tunnels to be dropped by the SonicWall. Your software release may not support all the features documented in this module. If a peer is dead, and the router never has any traffic to send to the peer, the router does not discover this until the IKE or IPsec security association (SA) has to be rekeyed (the liveliness of the peer is unimportant if the router is not trying to communicate with the peer). A device performs this verification by sending encrypted IKE Phase 1 notification payloads (R-U-THERE messages) to a peer and waiting for DPD acknowledgements (R-U-THERE-ACK messages) from the peer. The IPsec Dead Peer Detection Periodic Message Option feature allows you to configure your router to query the liveliness of its Internet Key Exchange (IKE) peer at regular intervals. on-idle <----- Trigger Dead Peer Detection when IPsec is idle. To configure DPD in an Easy VPN remote configuration, perform the following steps. periodic keyword. The following sample output from the debug crypto isakmp command verifies that IKE DPD is enabled: To see that IKE DPD is enabled (and that the peer supports DPD): when periodic DPD is enabled, you should see the following debug messages at the interval specified by the command: The above message corresponds to sending the DPD R_U_THERE message. The benefit of this approach over the default approach (on-demand dead peer detection) is earlier detection of dead peers. There needs a mechanism to detect remote peer failure. DPD and Cisco IOS XE keepalives function on the basis of the timer. isakmp periodic keyword. IKE peer should send an R-U-THERE query to its peer if it is interested in the liveliness of this peer. Abstract This document describes the method detecting a dead Internet Key Exchange (IKE) peer that is presently in use by a number of vendors. isakmp DPD retries are sent on demand. If DPD is enabled and the peer is unreachable for some time, you can use the clear crypto session command to manually clear IKE and IPsec SAs. The IPsec Dead Peer Detection Periodic Message Option feature is used to configure the router to query the liveliness of its Internet Key Exchange (IKE) peer at regular intervals. The benefit of IOS keepalives and periodic DPD is earlier detection of dead peers. Your software release may not support all the features documented in this module. enable, 2. An IKE peer that supports DPD (dead peer detection). This configuration will cause a router to cycle through the peer list when it detects that the first peer is dead. The following command was introduced: keepalive. crypto key Once 1 DPD message is missed by the peer, the router moves to a more aggressive state and sends the DPD retry message at the faster retry interval, which is the number of seconds between DPD retries if the DPD message is missed by the peer. client The method, called Dead Peer Detection (DPD) uses IPSec traffic patterns to minimize the number of IKE messages that are needed to confirm liveness. On the Dead Peer interval and retry, i set it to 5 and 5, respectively. session peer debug set Five aggressive DPD retry messages can be missed before the tunnel is marked as down. The benefit of this approach over the default approach (on-demand dead peer . This configuration causes a router to cycle through the peer list when it detects that the first peer is dead. (1110R). To access Cisco Feature Navigator, go to The following table provides release information about the feature or features described in this module. {host-name [dynamic] | ip-address}, 5. mode Essentially, keepalives and heartbeats mandate exchange of HELLOs at regular intervals. configure match Symptom. A keepalive timer of 10 seconds with 5 retries seems to work well with HA because of the time that it takes for the router to get into active mode. Enters crypto map configuration mode and creates or modifies a crypto map entry. {client | network-extension}, 7. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the Feature Information Table at the end of this document. This configuration also causes a router to cycle through the peer list when it detects that the first peer is dead. ipsec I.e. crypto In the first example, the tunnel is brought down manually using . peer . This forced approach results in earlier detection of dead peers. isakmp Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. match mode Specifies the group name and key value for the Virtual Private Network (VPN) connection. The following example shows that DPD and Cisco IOS keepalives are used in conjunction with multiple peers in a crypto map configuration when IKE is used to establish the security associations (SAs). {auto | manual}, 5. However, use of periodic DPD incurs extra overhead. Allows the gateway to send DPD messages to the peer. on-demand The benefit of this approach over the default approach (on-demand dead peer detection) is earlier detection of dead peers. The default DPD retry message is sent every 2 seconds. transform-set-name, 6. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. group-key, 6. set peer 10.2.80.209 set The default value is 600 seconds (10 minutes). Unless noted otherwise, subsequent releases of that software release train also support that feature. Because this option is the default, the on-demand keyword does not appear in configuration output. keepalive 3. keepalive command with the set An account on Cisco.com is not required. 2. I enable Dead Peer Dection (DPD) in the IKE gateway between the PAN IKEv1 and Cisco R2 router. Access to most tools on the Cisco Support website requires a Cisco.com user ID and password. --(Optional) Number of seconds between DPD retry messages if the DPD retry message is missed by the peer; the range is from 2 to 60 seconds. By contrast, with DPD, each peers DPD state is largely independent of the others. Configure dead peer detection in Cisco router. You can specify more than one transform set name by repeating this command. Likewise, the term keepalive will refer to a bidirectional message. For the latest feature information and caveats, see the release notes for your platform and software release. periodic keyword, the router defaults to the on-demand approach. Dead Peer Detection ( DPD) is a method that allows detection of unreachable Internet Key Exchange (IKE) peers. Unless noted otherwise, subsequent releases of that software release train also support that feature. set [retry-seconds] [periodic | on-demand], Router (config)# crypto isakmp keepalive 10 periodic. If the timer is set for 10 seconds, the router will send a hello message every 10 seconds (unless, of course, the router receives a hello message from the peer). set transform-set Trans1 To receive security and technical information about your products, you can subscribe to various services, such as the Product Alert Tool (accessed from Field Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds. terminal, 3. crypto Configure DHCP Server on Cisco IOS router, Configure web-based Kubernetes user interface, Create Kubernetes Cluster with Kubeadm on Centos 7 from scratch. DPD is a method used by devices to verify the current existence and availability of IPsec peers. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table. 2. If you do not configure the name, 4. DPD and IOS keepalive features can be used in conjunction with multiple peers in the crypto map to allow for stateless failover. When the seq-num The IPsec Dead Peer Detection Periodic Message Option feature allows you to configure your router to query the liveliness of its Internet Key Exchange (IKE) peer at regular intervals. Literally any change I make on the FortiGate side instantly brings up the tunnel. However, IOS keepalives and periodic DPD rely on periodic messages that have to be sent with considerable frequency. If a router has no traffic to send, it never sends a DPD message. This feature was introduced in Cisco IOS Release 12.3(7)T. This feature was integrated into Cisco IOS Release 12.2(33)SRA, This feature was integrated into Cisco IOS Release 12.2(33)SXH. The IPsec Dead Peer Detection Periodic Message Option feature allows you to configure your router to query the liveliness of its Internet Key Exchange (IKE) peer at regular intervals. To configure DPD with IPsec High Availability (HA), the recommendation is to use a value other than the default (which is 2 seconds). The dead-peer-detection options are used for IKEv1 security associations (SAs). This configuration also causes a router to cycle through the peer list when it detects that the first peer is dead. The ipsec-isakmp keyword indicates that IKE will be used to establish the IPsec SAs for protecting the traffic specified by this crypto map entry. crypto Router (config-crypto-ezvpn)# peer 10.10.10.10. DPD can be used in an Easy VPN remote configuration. seconds Overview. I'm trying to archive Ipsec STS failover using DPD. To configure a periodic DPD message, perform the following steps. peer This forced approach results in earlier detection of dead peers. group-name The above message corresponds to receiving the acknowledge (ACK) message from the peer. A device performs this verification by sending encrypted IKE Phase 1 notification payloads (R-U-THERE messages) to a peer and waiting for DPD acknowledgements (R-U-THERE-ACK messages) from the peer. In this example, an SA could be set up to the IPsec peer at 10.10.10.10, 10.2.2.2, or 10.3.3.3. Familiarity with configuring IP Security (IPsec). isakmp DPD can be used in an Easy VPN remote configuration. Before configuring the IPsec Dead Peer Detection Periodic Message Option feature, you should have the following: Using periodic DPD potentially allows the router to detect an unresponsive IKE peer with better response time when compared to on-demand DPD. peer configurations are for a site-to-site setup with no periodic DPD enabled. group Its tight integration with the Security Fabric enables policy-based automation to contain threats and control outbreaks. The benefit of this approach over the default approach (on-demand dead peer detection) is earlier detection of dead peers. You can specify more than one transform set name by repeating this command. However, use of periodic DPD incurs extra overhead. This situation can arise because of routing problems, one host rebooting, etc., and in such cases, there is often no way for IKE and IPSec to identify the loss of peer connectivity. 2. Click the red button under Connection and click OK to establish the connection. DPD can be used in an Easy VPN remote configuration. With the IPsec Dead Peer Detection Periodic Message Option feature, you can configure your router so that DPD messages are forced at regular intervals. This scheme, called Dead Peer Detection (DPD), relies on IKE Notify messages to query the liveliness of an IKE peer. [local ip-address [port local-port]] [remote ip-address [port remote-port]] | [fvrf vrf-name] [ivrf vrf-name], 3. In Sophos implementation, you cannot disable this parameter due to the Sophos Firewall being a stateful firewall which would timeout the connection otherwise. The IPsec Dead Peer Detection Periodic Message Option feature is used to configure the router to query the liveliness of its Internet Key Exchange (IKE) peer at regular intervals. Dead Peer Detection: Dead Peer Detection: Turned on: Check peer after every: 30: Wait for response up to: 120: When peer unreachable: Re-initiate: Click Save. The following sections provide references related to IPsec Dead Peer Detection Periodic Message Option. Likewise, it is sometimes necessary to detect black holes to recover lost resources. When the on-demand keyword is used, this argument is the number of seconds during which traffic is not received from the peer before DPD retry messages are sent if there is data (IPSec) traffic to send; the range is from 10 to 3600 seconds. The configurations are for the IKE Phase 1 policy and for the IKE preshared key. DPD and Cisco IOS XE keepalive features can be used in conjunction with multiple peers in the crypto map to allow for stateless failover. group-name {client | network-extension}, 7. crypto clear Deletes crypto sessions (IPsec and IKE SAs). mode [access-list-id | name]. On the Cisco router R2, I set "set crypto isakmp keepalive 10". clear This RFC describes DPD negotiation procedure and two new ISAKMP NOTIFY messages. Router (config-crypto-ezvpn)# group unity key preshared. This configuration also will cause a router to cycle through the peer list when it detects that the first peer is dead. To locate and download MIBs for selected platforms, Cisco IOS software releases, and feature sets, use Cisco MIB Locator found at the following URL: DPD conforms to the Internet draft "draft-ietf-ipsec-dpd-04.txt," which is pending publication as an Informational RFC (a number has not yet been assigned). Enters crypto map configuration mode and creates or modifies a crypto map entry. [access-list-id | name], Router (config)# crypto map green 1 ipsec-isakmp. Configure dead peer detection in Cisco router. Thus it does not define specific DPD timers, retry intervals, retry counts or even algorithm to be used to initiate a DPD exchange. periodic keyword. If a router has no traffic to send, it never sends a DPD message. Specifies the VPN mode of operation of the router. 2012 Cisco Systems, Inc. All rights reserved. Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Similarly, because rapid detection of the dead peer is often desired, these messages must be sent with some frequency, again translating into considerable overhead for message processing. --When the periodic keyword is used, this argument is the number of seconds between DPD messages; the range is from 10 to 3600 seconds. If you configure multiple peers, the router switches over to the next listed peer for a stateless failover. they send R-U-THERE message to a peer if the peer was idle for <threshold> seconds. {ipaddress | hostname}, Router (config)# crypto ipsec client ezvpn ezvpn-config1. The contrasting on-demand approach is the default. Enable the device to use dead peer detection (DPD). DPD addresses the shortcomings of IKE keepalives- and heartbeats- schemes by introducing a more reasonable logic governing message exchange. FortiClient is compatible with Fabric-Ready partners to further strengthen enterprises security posture. DPD and Cisco IOS keepalives function on the basis of the timer. www.cisco.com/go/cfn. Likewise, an entity can initiate a DPD exchange if it has sent outbound IPSec traffic, but not received any inbound IPSec packets in response. DPD allows the router to clear the IKE state when a peer becomes unreachable. In this example, an SA could be set up to the IPsec peer at 10.10.10.10, 10.2.2.2, or 10.3.3.3. The router sends one DPD R_U_THERE message and four retransmissions before it finally deletes the IPsec and IKE SAs. For example, if a router has no traffic to send, a DPD message is still sent at regular intervals, and if a peer is dead, the router does not have to wait until the IKE SA times out to find out. Specifies an extended access list for a crypto map entry. Dead Peer Detection (DPD) ( IPsec DPD ) is a mechanism whereby a device will send a liveness check to its IKEv2 peer to check that the peer is functioning correctly. client Cisco ASR 1000 Series Aggregation Services Routers, crypto map test 1 ipsec-isakmp The following command was introduced: Implementations that support DPD include the Cisco VPN 3000 concentrator, Cisco PIX Firewall, Cisco VPN Client, and Cisco IOS software in all modes of operation--site-to-site, Easy VPN remote, and Easy VPN server. The following example shows that DPD and Cisco IOS XE keepalives are used in conjunction with multiple peers in a crypto map configuration when IKE will be used to establish the security associations (SAs). http://www.cisco.com/cisco/web/support/index.html. Local and remote peer IDs are set, proxy ID's in Palo are set, NAT traversal set on both, both key times are the same, 28,800 for phase 1 and 2. session isakmp crypto www.cisco.com/go/trademarks. Specifies an IPsec peer in a crypto map entry. A hostname can be specified only when the router has a DNS server available for host-name resolution. crypto The following sample output from the debug crypto isakmp command verifies that IKE DPD is enabled: To see that IKE DPD is enabled (and that the peer supports DPD): when periodic DPD is enabled, you should see the following debug messages at the interval specified by the command: The above message corresponds to sending the DPD R_U_THERE message. On the IKE gateway between the PAN and Cisco R1 IKEv2, I set the "liveness check" to 5. For the purpose of this document, the term heartbeat will refer to a unidirectional message to prove liveliness. periodic keyword, the router defaults to the on-demand approach. This table lists only the software release that introduced support for a given feature in a given software release train. 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