Information Technology Reference
In-Depth Information
Table11-4
DECnet: Router or End Node Sees Incorrect Designated Router (continued)
Possible Problem
Solution
Multiple routers
have the same
router priority
(continued)
Syntax:
The following is the syntax for the
decnet router-priority
command:
decnet router-priority
value
To elect a designated router to which packets will be sent when
no destination is specified, use the
decnet router-priority
interface configuration command.
Syntax:
•
value
—Priority of the router. This can be a number in the
range 0 through 127. The larger the number, the higher the
priority. The default priority is 64.
Note:
If two routers are configured with the same priority, the
router with the higher node number will become the designated
router.
Adjacency between
nodes is not
bidirectional
1.
Use the
show decnet route exec
command to see whether
the adjacency with the expected designated router is in a
“down” or “initializing” state.
2.
Use the
debug decnet adj privileged exec
command to
determine whether hello packets are being exchanged.
Caution:
Because debugging output is assigned high priority in
the CPU process, it can render the system unusable. For this
reason, use
debug
commands only to troubleshoot specific
problems or during troubleshooting sessions with Cisco
technical support staff. Moreover, it is best to use
debug
commands during periods of lower network traffic and fewer
users. Debugging during these periods decreases the likelihood
that increased
debug
command processing overhead will affect
system use.
3.
If a router is not sending hello packets, use the
show interfaces
command to determine whether the
interface input and output queues are full. A full input
queue is indicated by a value of 75/75, and a full output
queue is indicated by a value of 40/40.
4.
If the queues are full, and no hello packets are being
exchanged, contact your router technical support
representative.
5.
If routers are sending hello packets, contact end-node
administrators to determine why end nodes are rejecting
hello packets.
DECnet: Routers Not Establishing Adjacencies
Symptom:
Routers do not establish adjacencies with other routers on the same LAN.
