Neighbor Uptime Tracking; Monitoring Ospf; Debug Commands - Juniper IGP - CONFIGURATION GUIDE V11.1.X Configuration Manual

JUNOSe 11.0.x IP, IPv6, and IGP Configuration Guide

Neighbor Uptime Tracking

You can use the history keyword with the show ip ospf neighbors command to
display a history of up to 10 events for all OSPF neighbors or a specific OSPF neighbor.
This history can aid in troubleshooting network problems related to neighbor flapping.
The history includes the interface for the neighbor, a timestamp for the event, whether
the neighbor transition is seen (up) or down, and the cause of down events.
You can track up to 50 neighbors; when that number is exceeded, the history of the
least recently tracked neighbor is overwritten. Similarly, when a neighbor's events
exceed 10, the oldest event is overwritten, because no more than 10 events can be
tracked per neighbor. Neighbor uptime tracking is not available for OSPFv3. See
"show ip ospf neighbors" on page 319 for output field definitions.
host1#show ip ospf neighbors history
Transition log for neighbor 10.10.8.2:
Interface
==============================================
ATM2/0.8
Transition log for neighbor 10.10.12.2:
Interface
==============================================
ATM2/0.12
ATM2/0.12
ATM2/0.12

Monitoring OSPF

Two sets of commands enable you to monitor OSPF operation on your router: the
debug and the show commands. Both sets of commands provide information about
your router's OSPF state and configuration.
The task you are performing with each of these monitoring commands is basically
the same for each command; that is, you are requesting information. The results of
this request can vary. For instance, the debug commands provide information (some
of which is dynamically obtained from router logs) about problems with the network
or the router, whereas the show commands provide information about the actual
state and configuration of your router.

debug Commands

The debug commands provide information about the following OSPF items:
300
Neighbor Uptime Tracking
Use to specify traps for OSPF.
Example
host1(config-router-rn)#traps all
Use the no version to delete the specified trap, group of traps, or all traps.
See traps
Event Cause
Seen NA
Event Cause
Seen NA
DOWN Interface down
Seen NA
Time
WED DEC 14 07:02:27
Time
WED DEC 14 07:09:12
WED DEC 14 07:05:47
WED DEC 14 07:02:32