Router 2

Another way to verify that matched traffic is being diverted to the bidirectional IPSec tunnel is to view the firewall filter counter. After you issue the ping command from Router 1 (seven packets), the es-traffic firewall filter counter looks like this:

Filter: es-traffic
Counters:
Name                                                Bytes              Packets
ipsec-tunnel                                          588                    7

After you issue the ping command from both Router 1 (seven packets) and Router 4 (five packets), the es-traffic firewall filter counter looks like this:

Filter: es-traffic
Counters:
Name                                                Bytes              Packets
ipsec-tunnel                                         1008                   12

To verify that the IKE SA negotiation between Routers 2 and 3 is successful, issue the show ike security-associations detail command. Notice that the SA contains the settings you specified, such as SHA-1 for the authentication algorithm and 3DES-CBC for the encryption algorithm.

IKE peer 10.1.15.2
  Role: Initiator, State: Matured
  Initiator cookie: b5dbdfe2f9000000, Responder cookie: a24c868410000041
  Exchange type: Main, Authentication method: Pre-shared-keys
  Local: 10.1.15.1:500, Remote: 10.1.15.2:500
  Lifetime: Expires in 401 seconds
  Algorithms:
   Authentication        : sha1 
   Encryption            : 3des-cbc
   Pseudo random function: hmac-sha1
  Traffic statistics:
   Input  bytes  :                 1736
   Output bytes  :                 2652
   Input  packets:                    9
   Output packets:                   15
  Flags: Caller notification sent 
  IPSec security associations: 3 created, 0 deleted
  Phase 2 negotiations in progress: 0

To verify that the IPSec security association is active, issue the show ipsec security-associations detail command. Notice that the SA contains the settings you specified, such as ESP for the protocol, HMAC-SHA1-96 for the authentication algorithm, and 3DES-CBC for the encryption algorithm.

Security association: sa-dynamic, Interface family: Up
  Local gateway: 10.1.15.1, Remote gateway: 10.1.15.2
  Local identity: ipv4_subnet(any:0,[0..7]=10.1.12.0/24)
  Remote identity: ipv4_subnet(any:0,[0..7]=10.1.56.0/24)
    Direction: inbound, SPI: 2133029543, AUX-SPI: 0
    Mode: tunnel, Type: dynamic, State: Installed
    Protocol: ESP, Authentication: hmac-sha1-96, Encryption: 3des-cbc
    Soft lifetime: Expires in 26212 seconds
    Hard lifetime: Expires in 26347 seconds
    Anti-replay service: Disabled
    Direction: outbound, SPI: 1759450863, AUX-SPI: 0
    Mode: tunnel, Type: dynamic, State: Installed
    Protocol: ESP, Authentication: hmac-sha1-96, Encryption: 3des-cbc
    Soft lifetime: Expires in 26212 seconds
    Hard lifetime: Expires in 26347 seconds
    Anti-replay service: Disabled

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