Ticket Number: HEA-NOC/20070220-15 Ticket Status: UPDATE
Ticket Type: unscheduled Resolver:
Ticket Opened: 20070220 18:37 UTC Problem Start: 20070220 09:00 UTC
Ticket Update: 20070222 18:46 UTC Problem End:
Site/line: Citywest PoP
Sometime between 00:00 and 9am on the 20th Feb, the cpu utilisation of the
core router in citywest increased. The utilisation has since remained
steady at this higher rate.
20070220 18:10 PC - Monitoring difficulties mean that that the increase in
CPU utilisation may have occured earlier than 09:00, although the MRTG
graphs indicate a sudden increase at this time.
20070222 15:30 PC - At 08:00 tomorrow morning (23rd Feb) the following
commands will be added to the MSDP loopback interface on the core router:
These may improve performance but are not expected to resolve the issue.
No service disruption is expected.
20070222 18:22 PC - CPU utilisation has returned to normal levels. This
was sometime between 16:00 and 18:00, the exact time is being verified.
Multicast on the GEANT link had significantly increased during Tuesday
morning and also returned to normal levels at 17:00 today.
This ticket can be monitored at http://www.hea.net/tickets/20070220-15