This document provides a sample configuration how to encrypt traffic from the network behind Router 1 to the network behind Router 2 (the Loopback 0s are used as networks in this example). If the primary link (Ethernet) between Router 1 and Router 2 goes down, IP Security (IPSec) traffic continues to flow through the secondary link (ISDN). There are several ways to achieve this objective; you can use dialer watch, backup interface, demand circuit, and floating static. This sample configuration demonstrates the dialer watch mechanism. For more information on other features, refer to Evaluating Backup Interfaces, Floating Static Routes, and Dialer Watch for DDR Backup.
There are no specific requirements for this document.
The information in this document is based on these software and hardware versions:
Cisco 2621 and 3640 Routers
Cisco IOS® Software Release 12.3(3)
The information presented in this document was created from devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command before you use it.
For more information on document conventions, refer to the Cisco Technical Tips Conventions.
In this section, you are presented with the information to configure the features described in this document.
Note: To find additional information on the commands used in this document, use the Command Lookup Tool (registered customers only) .
This document uses the network setup shown in the diagram here:
This document uses the configurations shown here:
Router 1 (2621) |
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r1#show running-config Building configuration... Current configuration : 2244 bytes ! version 12.3 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname r1 ! boot-start-marker boot-end-marker ! ! username r2 password 0 cisco !--- This is the username for remote router (Router 2) !--- and shared secret. Shared secret (used for Challenge Handshake !--- Authentication Protocol [CHAP]) must be the same on both sides. no aaa new-model ip subnet-zero ip tcp synwait-time 5 ! ! no ip domain lookup ! ip audit notify log ip audit po max-events 100 ip ssh break-string no ftp-server write-enable ! ! ! crypto isakmp policy 10 hash md5 authentication pre-share crypto isakmp key cisco address 222.222.222.222 ! ! crypto ipsec transform-set abc esp-des esp-md5-hmac ! crypto map cisco local-address Loopback1 crypto map cisco 10 ipsec-isakmp set peer 222.222.222.222 !--- Peer address, Loopback 1 of Router 2 set transform-set abc match address 101 !--- Networks to encrypt (Loopback 0 on both ends) ! isdn switch-type basic-ts013 ! ! ! ! ! ! ! ! ! no voice hpi capture buffer no voice hpi capture destination ! ! ! ! ! ! interface Loopback0 !--- Network to encrypt ip address 11.11.11.11 255.255.255.0 ! interface Loopback1 !--- Used for peer address for IPSec ip address 111.111.111.111 255.255.255.0 ! interface FastEthernet0/0 !--- Primary link ip address 10.1.1.1 255.255.255.0 no ip route-cache !--- Enable process switching no ip mroute-cache duplex auto speed auto crypto map cisco !--- Apply crypto map on primary interface ! interface BRI0/0 no ip address encapsulation ppp no ip route-cache no ip mroute-cache dialer pool-member 1 isdn switch-type basic-ts013 no cdp enable ! interface Dialer1 !--- Backup link ip address 20.1.1.1 255.255.255.0 encapsulation ppp no ip route-cache !--- Enable process switching ip ospf cost 9999 !--- Increase the cost so that when primary comes up again, !--- Open Shortest Path First (OSPF) routes are !--- preferred using the primary link (due to better cost). no ip mroute-cache dialer idle-timeout 180 dialer pool 1 dialer string 94134028 dialer watch-group 1 !--- Enable dialer watch on this backup interface. !--- Watch the route specified with the dialer watch-list 1 command. dialer-group 1 !--- Apply interesting traffic defined in dialer list 1. no peer neighbor-route ppp authentication chap crypto map cisco !--- Apply crypto map on backup interface. ! router ospf 1 !--- OSPF advertising Loopback 0, Loopback 1, !--- primary, and secondary links. log-adjacency-changes network 10.1.1.0 0.0.0.255 area 0 network 11.11.11.0 0.0.0.255 area 0 network 20.1.1.0 0.0.0.255 area 0 network 111.111.111.0 0.0.0.255 area 0 ! ip http server no ip http secure-server ip classless ! ! access-list 101 permit ip host 11.11.11.11 host 22.22.22.22 !--- Access control list (ACL) 101 is the !--- IPSec traffic used in match address. access-list 110 deny ip any any !--- ACL 110 is for the dialer list to mark !--- all IP traffic uninteresting. The dialer watch will !--- trigger the ISDN backup when the route is lost. dialer watch-list 1 ip 222.222.222.222 255.255.255.255 !--- This defines the route(s) to be watched. !--- This exact route (including subnet mask) !--- must exist in the routing table. !--- Use the dialer watch-group 1 command to apply this !--- list to the backup interface. dialer watch-list 1 delay route-check initial 10 dialer-list 1 protocol ip list 110 !--- Interesting traffic is defined by ACL 110. !--- This is applied to Dialer1 using dialer group 1. ! ! ! dial-peer cor custom ! ! ! ! ! line con 0 exec-timeout 0 0 logging synchronous escape-character 27 line aux 0 line vty 0 4 login ! end |
Router 2 (3640) |
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r2#show running-config Building configuration... Current configuration : 2311 bytes ! version 12.3 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname r2 ! boot-start-marker boot-end-marker ! username r1 password 0 cisco !--- This is the username for remote router (Router 1) !--- and shared secret. Shared secret (used for CHAP) !--- must be the same on both sides. no aaa new-model ip subnet-zero ip tcp synwait-time 5 ! ! no ip domain lookup ! ip audit notify log ip audit po max-events 100 ip ssh break-string no ftp-server write-enable ! ! ! crypto isakmp policy 10 hash md5 authentication pre-share crypto isakmp key cisco address 111.111.111.111 ! ! crypto ipsec transform-set abc esp-des esp-md5-hmac ! ! crypto map cisco local-address Loopback1 crypto map cisco 10 ipsec-isakmp set peer 111.111.111.111 !--- Peer address, Loopback 1 of Router 1 set transform-set abc match address 101 !--- Networks to encrypt (Loopback 0 on both ends) ! isdn switch-type basic-ts013 ! ! ! ! ! ! ! ! ! no voice hpi capture buffer no voice hpi capture destination ! ! ! ! ! ! interface Loopback0 ip address 22.22.22.22 255.255.255.0 !--- Network to encrypt ! interface Loopback1 ip address 222.222.222.222 255.255.255.0 !--- Used for peer address for IPSec. ! interface BRI0/0 no ip address encapsulation ppp no ip route-cache no ip mroute-cache dialer pool-member 1 isdn switch-type basic-ts013 ! interface Ethernet0/0 !--- Primary link ip address 10.1.1.2 255.255.255.0 no ip route-cache !--- Enable process switching. no ip mroute-cache half-duplex crypto map cisco !--- Apply crypto map on primary interface. ! interface Dialer1 ip address 20.1.1.2 255.255.255.0 encapsulation ppp no ip route-cache ip ospf cost 9999 no ip mroute-cache dialer pool 1 dialer idle-timeout 600 dialer remote-name r1 !--- Dialer for the BRI interface of the remote router !--- without a dial string. dialer-group 1 !--- Apply interesting traffic defined in dialer list 1. ppp authentication chap crypto map cisco !--- Apply crypto map on backup interface. ! router ospf 1 log-adjacency-changes network 10.1.1.0 0.0.0.255 area 0 network 20.1.1.0 0.0.0.255 area 0 network 22.22.22.0 0.0.0.255 area 0 network 222.222.222.0 0.0.0.255 area 0 ! no ip http server no ip http secure-server ip classless ! ! access-list 101 permit ip host 22.22.22.22 host 11.11.11.11 access-list 110 deny ospf any any !--- Mark OSPF as uninteresting. !--- This will not allow OSPF hellos !--- to try to bring the link up. access-list 110 permit ip any any dialer-list 1 protocol ip list 110 !--- Interesting traffic is defined by ACL 110. !--- This is applied to Dialer1 using dialer group 1. ! line con 0 exec-timeout 0 0 logging synchronous escape-character 27 line aux 0 line vty 0 4 login ! end |
This section provides information you can use to confirm whether your configuration functions properly.
Certain show commands are supported by the Output Interpreter Tool (registered customers only) , which allows you to view an analysis of show command output.
Routing table of Router 1 (2621)—primary link up
r1#show ip route Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 I - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area, * - candidate default, U - per-user static route, o - ODR, P - periodic downloaded static route Gateway of last resort is not set 222.222.222.0/32 is subnetted, 1 subnets O 222.222.222.222 [110/2] via 10.1.1.2, 00:00:25, FastEthernet0/0 20.0.0.0/24 is subnetted, 1 subnets C 20.1.1.0 is directly connected, Dialer1 22.0.0.0/32 is subnetted, 1 subnets O 22.22.22.22 [110/2] via 10.1.1.2, 00:00:25, FastEthernet0/0 111.0.0.0/24 is subnetted, 1 subnets C 111.111.111.0 is directly connected, Loopback1 10.0.0.0/24 is subnetted, 1 subnets C 10.1.1.0 is directly connected, FastEthernet0/0 11.0.0.0/24 is subnetted, 1 subnets C 11.11.11.0 is directly connected, Loopback0
Routing table of Router 2 (3640)—primary link up
r2#show ip route Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 I - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area, * - candidate default, U - per-user static route, o - ODR, P - periodic downloaded static route Gateway of last resort is not set. C 222.222.222.0/24 is directly connected, Loopback1 20.0.0.0/24 is subnetted, 1 subnets C 20.1.1.0 is directly connected, Dialer1 22.0.0.0/24 is subnetted, 1 subnets C 22.22.22.0 is directly connected, Loopback0 111.0.0.0/32 is subnetted, 1 subnets O 111.111.111.111 [110/11] via 10.1.1.1, 00:06:22, Ethernet0/0 10.0.0.0/24 is subnetted, 1 subnets C 10.1.1.0 is directly connected, Ethernet0/0 11.0.0.0/32 is subnetted, 1 subnets O 11.11.11.11 [110/11] via 10.1.1.1, 00:06:23, Ethernet0/0
OSPF neighbor of Router 1 (2621)—primary link up
r1#show ip ospf neighbor Neighbor ID Pri State Dead Time Address Interface 222.222.222.222 1 FULL/DR 00:00:33 10.1.1.2 FastEthernet0/0
OSPF neighbor of Router 2 (3640)—primary link up
r2#show ip ospf neighbor Neighbor ID Pri State Dead Time Address Interface 111.111.111.111 1 FULL/BDR 00:00:31 10.1.1.1 Ethernet0/0
Routing table of Router 1 (2621)—primary link down
r1#show ip route Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP I - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area, * - candidate default, U - per-user static route, o - ODR, P - periodic downloaded static route Gateway of last resort is not set. 222.222.222.0/32 is subnetted, 1 subnets O 222.222.222.222 [110/10000] via 20.1.1.2, 00:00:09, Dialer1 20.0.0.0/24 is subnetted, 1 subnets C 20.1.1.0 is directly connected, BRI0/0 20.0.0.0/24 is subnetted, 1 subnets C 20.1.1.0 is directly connected, Dialer1 22.0.0.0/32 is subnetted, 1 subnets O 22.22.22.22 [110/10000] via 20.1.1.2, 00:00:09, Dialer1 111.0.0.0/24 is subnetted, 1 subnets C 111.111.111.0 is directly connected, Loopback1 10.0.0.0/24 is subnetted, 1 subnets O 10.1.1.0 [110/10009] via 20.1.1.2, 00:00:09, Dialer1 11.0.0.0/24 is subnetted, 1 subnets C 11.11.11.0 is directly connected, Loopback0
Routing table of Router 2 (3640)—primary link down
r2#show ip route Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP I - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area, * - candidate default, U - per-user static route, o - ODR, P - periodic downloaded static route Gateway of last resort is not set. C 222.222.222.0/24 is directly connected, Loopback1 20.0.0.0/8 is variably subnetted, 2 subnets, 2 masks C 20.1.1.0/24 is directly connected, Dialer1 C 20.1.1.1/32 is directly connected, Dialer1 22.0.0.0/24 is subnetted, 1 subnets C 22.22.22.0 is directly connected, Loopback0 111.0.0.0/32 is subnetted, 1 subnets O 111.111.111.111 [110/10000] via 20.1.1.1, 00:00:07, Dialer1 10.0.0.0/24 is subnetted, 1 subnets C 10.1.1.0 is directly connected, Ethernet0/0 11.0.0.0/32 is subnetted, 1 subnets O 11.11.11.11 [110/10000] via 20.1.1.1, 00:00:08, Dialer1
OSPF neighbor of Router 1 (2621)—primary link down
r1#show ip ospf neighbor Neighbor ID Pri State Dead Time Address Interface 222.222.222.222 0 FULL/ - 00:00:32 20.1.1.2 Dialer1
OSPF neighbor of Router 2 (3640)—primary link down
r2#show ip ospf neighbor Neighbor ID Pri State Dead Time Address Interface 111.111.111.111 0 FULL/ - 00:00:31 20.1.1.1 Dialer1
The debug dialer and several show command outputs displayed here show the primary link as failed, and dialer watch recognizesthe lost route. The router then initiates the backup link and OSPF converges through the secondary link. Each time the idle timeout expires, the router checks whether the primary link is down. If the primary link is found to be up, dialer watch disconnects the backup link after the disable timer expires and tears down the call, and OSPF converges by way of the primary link as usual.
These are the debug and show command outputs of Router one (2621), when the primary link goes down and is brought up again.
r1#show debug Dial on demand: Dial on demand events debugging is on r1# 03:00:21: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to down !--- Primary link was brought down manually when you disable the switch ports. 03:00:21: %OSPF-5-ADJCHG: Process 1, Nbr 222.222.222.222 on FastEthernet0/0 from FULL to DOWN, Neighbor Down: Interface down or detached !--- Primary link goes down. !--- OSPF loses neighbor adjacency. r1# !--- Dialer watch kicks in. 03:00:21: DDR: Dialer Watch: watch-group = 1 03:00:21: DDR: network 222.222.222.222/255.255.255.255 DOWN, 03:00:21: DDR: primary DOWN 03:00:21: DDR: Dialer Watch: Dial Reason: Primary of group 1 DOWN 03:00:21: DDR: Dialer Watch: watch-group = 1, 03:00:21: BR0/0 DDR: rotor dialout [best] least recent failure is also most recent failure 03:00:21: BR0/0 DDR: rotor dialout [best] also has most recent failure 03:00:21: BR0/0 DDR: rotor dialout [best] 03:00:21: DDR: dialing secondary by dialer string 94134028 on Di1 03:00:21: BR0/0 DDR: Attempting to dial 94134028 03:00:21: DDR: Dialer Watch: watch-group = 1 r1# 03:00:21: DDR: network 222.222.222.222/255.255.255.255 DOWN, 03:00:21: DDR: primary DOWN 03:00:21: DDR: Dialer Watch: Dial Reason: Secondary of group 1 AVAILABLE 03:00:21: DDR: Dialer Watch: watch-group = 1, 03:00:21: DDR: Dialer Watch: watch-group = 1 03:00:21: DDR: network 222.222.222.222/255.255.255.255 DOWN, 03:00:21: DDR: primary DOWN 03:00:21: DDR: Dialer Watch: Dial Reason: Secondary of group 1 AVAILABLE 03:00:21: DDR: Dialer Watch: watch-group = 1, 03:00:21: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/0, TEI 82 changed to up 03:00:94489280514: %LINK-3-UPDOWN: Interface BRI0/0:1, changed state to up 03:00:94489280516: BR0/0:1 DDR: Dialer Watch: resetting call in progress 03:00:94489280512: BR0/0:1: interface must be fifo queue, force fifo 03:00:94489280512: %DIALER-6-BIND: Interface BR0/0:1 bound to profile Di1 r1# 03:00:22: BR0/0:1 DDR: Remote name for r2 03:00:22: BR0/0:1 DDR: dialer protocol up 03:00:23: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0/0:1, changed state to up r1# 03:00:28: %ISDN-6-CONNECT: Interface BRI0/0:1 is now connected to 94134028 r2 !--- Backup link is now connected to Router 2. r1# 03:00:31: %OSPF-5-ADJCHG: Process 1, Nbr 222.222.222.222 on Dialer1 from LOADING to FULL, Loading Done !--- OSPF converges over the backup link. r1# r1#show dialer BRI0/0 - dialer type = ISDN Dial String Successes Failures Last DNIS Last status 0 incoming call(s) have been screened. 0 incoming call(s) rejected for callback. BRI0/0:1 - dialer type = ISDN Idle timer (180 secs), Fast idle timer (20 secs) Wait for carrier (30 secs), Re-enable (15 secs) Dialer state is data link layer up Dial reason: Dialing on watched route loss !--- Dial reason is the lost route. Interface bound to profile Di1 Time until disconnect 154 secs !--- Idle timeout is ticking. Current call connected 00:00:25 Connected to 94134028 (r2) BRI0/0:2 - dialer type = ISDN Idle timer (120 secs), Fast idle timer (20 secs) Wait for carrier (30 secs), Re-enable (15 secs) Dialer state is idle Di1 - dialer type = DIALER PROFILE Idle timer (180 secs), Fast idle timer (20 secs) Wait for carrier (30 secs), Re-enable (15 secs) Dialer state is data link layer up Number of active calls = 1 Dial String Successes Failures Last DNIS Last status 94134028 45 24 00:00:27 successful Default r1#show isdn active ----------------------------------------------------------------------------- ISDN ACTIVE CALLS ----------------------------------------------------------------------------- Call Calling Called Remote Seconds Seconds Seconds Charges Type Number Number Name Used Left Idle Units/Currency ----------------------------------------------------------------------------- Out ---N/A--- 94134028 r2 37 142 37 0 ----------------------------------------------------------------------------- r1#show dialer BRI0/0 - dialer type = ISDN Dial String Successes Failures Last DNIS Last status 0 incoming call(s) have been screened. 0 incoming call(s) rejected for callback. BRI0/0:1 - dialer type = ISDN Idle timer (180 secs), Fast idle timer (20 secs) Wait for carrier (30 secs), Re-enable (15 secs) Dialer state is data link layer up Dial reason: Dialing on watched route loss Interface bound to profile Di1 Time until disconnect 47 secs !--- Idle timeout is ticking. Current call connected 00:02:12 Connected to 94134028 (r2) BRI0/0:2 - dialer type = ISDN Idle timer (120 secs), Fast idle timer (20 secs) Wait for carrier (30 secs), Re-enable (15 secs) Dialer state is idle Di1 - dialer type = DIALER PROFILE Idle timer (180 secs), Fast idle timer (20 secs) Wait for carrier (30 secs), Re-enable (15 secs) Dialer state is data link layer up Number of active calls = 1 Dial String Successes Failures Last DNIS Last status 94134028 45 24 00:02:14 successful Default r1#show dialer BRI0/0 - dialer type = ISDN Dial String Successes Failures Last DNIS Last status 0 incoming call(s) have been screened. 0 incoming call(s) rejected for callback. BRI0/0:1 - dialer type = ISDN Idle timer (180 secs), Fast idle timer (20 secs) Wait for carrier (30 secs), Re-enable (15 secs) Dialer state is data link layer up Dial reason: Dialing on watched route loss Interface bound to profile Di1 Time until disconnect 0 secs !--- Idle timeout is ticking. Current call connected 00:02:59 Connected to 94134028 (r2) BRI0/0:2 - dialer type = ISDN Idle timer (120 secs), Fast idle timer (20 secs) Wait for carrier (30 secs), Re-enable (15 secs) Dialer state is idle Di1 - dialer type = DIALER PROFILE Idle timer (180 secs), Fast idle timer (20 secs) Wait for carrier (30 secs), Re-enable (15 secs) Dialer state is data link layer up Number of active calls = 1 Dial String Successes Failures Last DNIS Last status 94134028 45 24 00:03:05 successful Default r1# 03:03:22: BR0/0:1 DDR: idle timeout !--- Idle timed out. !--- Dialer watch checks lost routes !--- again and reset the idle time since primary is not up yet. 03:03:22: DDR: Dialer Watch: watch-group = 1 03:03:22: DDR: network 222.222.222.222/255.255.255.255 UP, 03:03:22: DDR: primary DOWN !--- Primary link is still down. r1# r1#show dialer BRI0/0 - dialer type = ISDN Dial String Successes Failures Last DNIS Last status 0 incoming call(s) have been screened. 0 incoming call(s) rejected for callback. BRI0/0:1 - dialer type = ISDN Idle timer (180 secs), Fast idle timer (20 secs) Wait for carrier (30 secs), Re-enable (15 secs) Dialer state is data link layer up Dial reason: Dialing on watched route loss Interface bound to profile Di1 Time until disconnect 154 secs !--- Idle timeout was reset by dialer watch. Current call connected 00:03:25 Connected to 94134028 (r2) BRI0/0:2 - dialer type = ISDN Idle timer (120 secs), Fast idle timer (20 secs) Wait for carrier (30 secs), Re-enable (15 secs) Dialer state is idle Di1 - dialer type = DIALER PROFILE Idle timer (180 secs), Fast idle timer (20 secs) Wait for carrier (30 secs), Re-enable (15 secs) Dialer state is data link layer up Number of active calls = 1 Dial String Successes Failures Last DNIS Last status 94134028 45 24 00:03:28 successful Default r1# 03:04:59: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up !--- Primary link was brought up manually when the switch ports are enabled. r1# r1# 03:05:50: %OSPF-5-ADJCHG: Process 1, Nbr 222.222.222.222 on FastEthernet0/0 from LOADING to FULL, Loading Done r1# r1#show ip ospf neigh Neighbor ID Pri State Dead Time Address Interface 222.222.222.222 0 FULL/ - 00:00:02 20.1.1.2 Dialer1 !--- OSPF over secondary link is still up because !--- the call is not terminated yet, waiting for idle timeout. 222.222.222.222 1 FULL/DR 00:00:38 10.1.1.2 FastEthernet0/0 !--- OSPF is now starts to converge over primary link. r1# r1#show ip route 222.222.222.222 !--- The watched route is now learned through the primary link. !--- Check the cost. Routing entry for 222.222.222.222/32 Known via "ospf 1", distance 110, metric 2, type intra area Last update from 10.1.1.2 on FastEthernet0/0, 00:00:16 ago Routing Descriptor Blocks: * 10.1.1.2, from 222.222.222.222, 00:00:16 ago, via FastEthernet0/0 Route metric is 2, traffic share count is r1# 03:06:22: BR0/0:1 DDR: idle timeout !--- Idle timed out. !--- Dialer watch checks lost routes. Since primary is up, !--- it tears down the call. 03:06:22: DDR: Dialer Watch: watch-group = 1 03:06:22: DDR: network 222.222.222.222/255.255.255.255 UP, 03:06:22: DDR: primary UP 03:06:22: BR0/0:1 DDR: disconnecting call 03:06:22: BR0/0:1 DDR: Dialer Watch: resetting call in progress 03:06:22: DDR: Dialer Watch: watch-group = 1 03:06:22: DDR: network 222.222.222.222/255.255.255.255 UP, 03:06:22: DDR: primary UP 03:06:22: %ISDN-6-DISCONNECT: Interface BRI0/0:1 disconnected from 94134028 r2, call lasted 360 seconds 03:06:96677768412: %LINK-3-UPDOWN: Interface BRI0/0:1, changed state to down 03:06:94489281195: BR0/0 DDR: has total 0 call(s), dial_out 0, dial_in 0 r1# 03:06:94489280544: %DIALER-6-UNBIND: Interface BR0/0:1 unbound from profile Di1 03:06:23: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0/0:1, changed state to down r1# 03:06:37: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BR0/0, TEI 82 changed to down r1# 03:07:01: %OSPF-5-ADJCHG: Process 1, Nbr 222.222.222.222 on Dialer1 from FULL to DOWN, Neighbor Down: Dead timer expired !--- OSPF neighbor is down because the secondary link is down. !--- Dead timer has expired. r1# r1#show ip ospf neigh Neighbor ID Pri State Dead Time Address Interface 222.222.222.222 1 FULL/DR 00:00:38 10.1.1.2 FastEthernet0/0 !--- OSPF neighbor is through the primary link only. r1#u all All possible debugging has been turned off r1#
This section provides information you can use to troubleshoot your configuration. For information on troubleshooting general issues with ISDN Layers 1, 2, and 3, refer to Using the show isdn status Command for BRI Troubleshooting.
Certain show commands are supported by the Output Interpreter Tool (registered customers only) , which allows you to view an analysis of show command output.
Note: Before you issue debug commands, refer to Important Information on Debug Commands.
These debug commands can be run on both IPSec peers.
debug crypto isakmp—Displays errors during Phase 1.
debug crypto ipsec—Displays errors during Phase 2.
debug crypto engine—Displays information from the crypto engine.
These show commands can be run on both IPSec peers.
show crypto isakmp sa—Displays all current Internet Key Exchange (IKE) security associations (SAs) at a peer.
show crypto ipsec sa—Displays the settings used by current [IPSec] SAs.
show crypto engine connections active—Displays current connections and information regarding encrypted and decrypted packets.
These clear commands can be used to clear SAs.
clear crypto isakmp—Clears the Phase one security associations.
clear crypto sa—Clears the Phase two security associations.
Revision | Publish Date | Comments |
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1.0 |
14-Jan-2008 |
Initial Release |