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 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