В моем тесте к ультра2 подключено 2 клиента IPIP over IPSec v2 , туннели по параметрам одинаковые, отличаются только ip адреса.(еще болтается virtualip сервер)
На клиенте IPIP4 дергаю питание.
Север пытается восстановить соединение:
[I] Jul 24 19:00:20 ipsec: 12[IKE] retransmit 1 of request with message ID 0
[I] Jul 24 19:00:29 ipsec: 14[IKE] retransmit 2 of request with message ID 0
[I] Jul 24 19:00:39 ipsec: 15[IKE] retransmit 3 of request with message ID 0
[I] Jul 24 19:00:50 ipsec: 07[IKE] retransmit 4 of request with message ID 0
[I] Jul 24 19:01:01 ipsec: 09[IKE] retransmit 5 of request with message ID 0
[I] Jul 24 19:01:14 ipsec: 16[IKE] retransmit 6 of request with message ID 0
[I] Jul 24 19:01:28 ipsec: 16[IKE] retransmit 7 of request with message ID 0
[I] Jul 24 19:01:44 ipsec: 14[IKE] retransmit 8 of request with message ID 0
[I] Jul 24 19:02:01 ipsec: 12[IKE] giving up after 8 retransmits
[E] Jul 24 19:02:01 ndm: IpSec::Configurator: remote peer of crypto map "IPIP4" is down.
[I] Jul 24 19:02:01 ndm: IpSec::Configurator: crypto map "IPIP4" active IKE SA: 0, active CHILD SA: 0.
[I] Jul 24 19:02:01 ndm: Network::Interface::SecureIPTunnel: "IPIP4": IPsec layer is down, shutdown tunnel layer.
[I] Jul 24 19:02:01 ndm: Network::Interface::SecureIPTunnel: "IPIP4": secured tunnel is down.
[I] Jul 24 19:02:01 ndm: IpSec::Manager: IP secure connection "IPIP4" was stopped.
[I] Jul 24 19:02:01 ipsec: 12[IKE] restarting CHILD_SA IPIP4
[I] Jul 24 19:02:01 ipsec: 12[IKE] initiating IKE_SA IPIP4[78] to 192.168.1.66
[I] Jul 24 19:02:02 ndm: IpSec::Configurator: crypto map "IPIP4" active IKE SA: 0, active CHILD SA: 0.
[I] Jul 24 19:02:02 ndm: IpSec::Configurator: crypto map "IPIP4" active IKE SA: 0, active CHILD SA: 0.
[I] Jul 24 19:02:02 ndm: kernel: EIP93: release SPI cd50f94c
[I] Jul 24 19:02:02 ndm: kernel: EIP93: release SPI c1eeca41
Далее идет реконфигурация ipsec
[I] Jul 24 19:02:02 ndm: IpSec::IpSecNetfilter: start reloading netfilter configuration...
[I] Jul 24 19:02:02 ndm: IpSec::IpSecNetfilter: netfilter configuration reloading is done.
[I] Jul 24 19:02:03 ndm: IpSec::Manager: create IPsec reconfiguration transaction...
[I] Jul 24 19:02:03 ndm: IpSec::Manager: add config for crypto map "VirtualIPServer".
[I] Jul 24 19:02:03 ndm: IpSec::Manager: add config for crypto map "IPIP2".
[I] Jul 24 19:02:03 ndm: IpSec::Manager: add config for crypto map "IPIP3".
[I] Jul 24 19:02:03 ndm: IpSec::Manager: add config for crypto map "IPIP4".
[I] Jul 24 19:02:03 ndm: IpSec::Manager: IPsec reconfiguration transaction was created.
[I] Jul 24 19:02:03 ndm: IpSec::Configurator: start applying IPsec configuration.
[I] Jul 24 19:02:03 ndm: IpSec::Configurator: IPsec configuration applying is done.
[I] Jul 24 19:02:03 ndm: IpSec::Configurator: start reloading IPsec config task.
[I] Jul 24 19:02:03 ipsec: 10[CFG] received stroke: delete connection 'VirtualIPServer'
[I] Jul 24 19:02:03 ipsec: 10[CFG] deleted connection 'VirtualIPServer'
[I] Jul 24 19:02:03 ipsec: 05[CFG] received stroke: delete connection 'IPIP2'
[I] Jul 24 19:02:03 ipsec: 05[CFG] deleted connection 'IPIP2'
[I] Jul 24 19:02:03 ipsec: 06[CFG] received stroke: delete connection 'IPIP3'
[I] Jul 24 19:02:03 ipsec: 06[CFG] deleted connection 'IPIP3'
[I] Jul 24 19:02:03 ipsec: 15[CFG] received stroke: delete connection 'IPIP4'
[I] Jul 24 19:02:03 ipsec: 15[CFG] deleted connection 'IPIP4'
[I] Jul 24 19:02:03 ipsec: 00[DMN] signal of type SIGHUP received. Reloading configuration
[I] Jul 24 19:02:03 ipsec: 09[CFG] received stroke: add connection 'VirtualIPServer'
[I] Jul 24 19:02:03 ipsec: 00[CFG] loaded 0 entries for attr plugin configuration
[I] Jul 24 19:02:03 ipsec: 09[CFG] reusing virtual IP address pool 172.20.0.1-172.20.0.65
[I] Jul 24 19:02:03 ipsec: 09[CFG] added configuration 'VirtualIPServer'
[I] Jul 24 19:02:03 ipsec: 07[CFG] received stroke: add connection 'IPIP2'
[I] Jul 24 19:02:03 ipsec: 07[CFG] added configuration 'IPIP2'
[I] Jul 24 19:02:03 ipsec: 10[CFG] received stroke: add connection 'IPIP3'
[I] Jul 24 19:02:03 ipsec: 10[CFG] added configuration 'IPIP3'
[I] Jul 24 19:02:03 ipsec: 05[CFG] received stroke: add connection 'IPIP4'
[I] Jul 24 19:02:03 ipsec: 05[CFG] added configuration 'IPIP4'
[I] Jul 24 19:02:04 ndm: IpSec::Configurator: reloading IPsec config task done.
[I] Jul 24 19:02:04 ndm: IpSec::Configurator: crypto map "IPIP3" shutdown started.
[I] Jul 24 19:02:04 ndm: IpSec::IpSecNetfilter: start reloading netfilter configuration...
Приводящая к закрытию IPIP3
[I] Jul 24 19:02:04 ndm: IpSec::Configurator: crypto map "IPIP3" shutdown started.
Что еще нужно уточнить?