Finish Up¶
After completing the configuration, check the status as described in IS-IS Status.
The two main items to check are neighbors and routes.
Check Neighbors¶
First, check the neighbors to ensure the routers formed an adjacency with each others:
tnsr# show route dynamic isis neighbor
Area exco:
System Id Interface L State Holdtime SNPA
ro.example.com CCLINK 1 Up 10 90ec.7747.5e5d
If the neighbors do not appear or have an unexpected status, double check the configuration and confirm the two nodes can communicate over their connected interface(s).
Check Routes¶
Next, check the routes received by IS-IS to ensure all of the expected networks are present:
tnsr# show route dynamic isis route
Area exco:
IS-IS paths to level-1 routers that speak IP
Vertex Type Metric Next-Hop Interface Parent
--------------------------------------------------------------------------------------------
hq.example.com
10.2.0.0/24 IP internal 0 hq.example.com(4)
10.127.0.0/30 IP internal 0 hq.example.com(4)
ro.example.com TE-IS 10 ro.example.com CCLINK hq.example.com(4)
ro.example.com pseudo_TE-IS 20 ro.example.com CCLINK ro.example.com(4)
10.127.0.0/30 IP TE 20 ro.example.com CCLINK ro.example.com(4)
10.30.0.0/24 IP TE 20 ro.example.com CCLINK ro.example.com(4)
IS-IS L1 IPv4 routing table:
Prefix Metric Interface Nexthop Label(s)
--------------------------------------------------------
10.2.0.0/24 0 - - -
10.30.0.0/24 20 CCLINK 10.127.0.2 -
10.127.0.0/30 20 CCLINK 10.127.0.2 -
Check Connectivity¶
If the routes appear to be correct, try to communicate from a network local to the node:
tnsr# ping 10.30.0.1 source 10.2.0.1 count 5
PING 10.30.0.1 (10.30.0.1) from 10.2.0.1 : 56(84) bytes of data.
64 bytes from 10.30.0.1: icmp_seq=1 ttl=64 time=0.136 ms
64 bytes from 10.30.0.1: icmp_seq=2 ttl=64 time=0.108 ms
64 bytes from 10.30.0.1: icmp_seq=3 ttl=64 time=0.134 ms
64 bytes from 10.30.0.1: icmp_seq=4 ttl=64 time=0.106 ms
64 bytes from 10.30.0.1: icmp_seq=5 ttl=64 time=0.104 ms
--- 10.30.0.1 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4136ms
rtt min/avg/max/mdev = 0.104/0.117/0.136/0.014 ms