Displaying IS-IS Adjacencies in Detail
Purpose
Display extensive information about IS-IS neighbors.
Action
From the CLI, enter the show isis adjacency extensive command.
Sample Output
user@host> show isis adjacency extensiveR1 Interface: so-0/0/0.0, Level: 2, State: Up, Expires in 25 secs Priority: 0, Up/Down transitions: 1, Last transition: 4w6d 19:38:52 ago Circuit type: 2, Speaks: IP, IPv6 Topologies: Unicast Restart capable: Yes IP addresses: 10.1.12.1 Transition log: When State Reason Wed Jul 13 16:26:11 Up Seenself R3 Interface: so-0/0/1.0, Level: 2, State: Up, Expires in 23 secs Priority: 0, Up/Down transitions: 1, Last transition: 6w5d 19:07:16 ago Circuit type: 2, Speaks: IP, IPv6 Topologies: Unicast Restart capable: Yes IP addresses: 10.1.23.2 Transition log: When State Reason Thu Jun 30 16:57:46 Up Seenself R6 Interface: so-0/0/2.0, Level: 2, State: Up, Expires in 25 secs Priority: 0, Up/Down transitions: 1, Last transition: 6w0d 18:01:18 ago Circuit type: 2, Speaks: IP, IPv6 Topologies: Unicast Restart capable: Yes IP addresses: 10.1.26.2 Transition log: When State Reason Tue Jul 5 18:03:45 Up Seenself
Meaning
Check the following fields and verify adjacency information about IS-IS neighbors:
- Interface—Interface through which the neighbor is reachable
- L or Level—Configured level of IS-IS:
- 1—Level 1 only
- 2—Level 2 only
- 3—Level 1 and Level 2
An exclamation point before the level number indicates that the adjacency is missing an IP address.
- State—Status of the adjacency: Up, Down, New, One-way, Initializing, or Rejected
- Event—Message that identifies the cause of a state
- Down reason—Reason the adjacency is down
- Restart capable—Denotes a neighbor configured for graceful restart
- Transition log—List of transitions including When, State, and Reason
Related Topics
For a complete description of show isis adjacency extensive output, see the JUNOS Routing Protocols and Policies Command Reference.