Ticket 20090702_1

Ticket Number:	20090702_1	Ticket State:	CLOSED
Ticket Opened:	2009-07-02 17:47	Ticket Closed:	2009-07-03 10:19
Ticket Description:	Outage UZH, PZH

Problem Description:

PHZH complained about an outage of Internet connectivity between 16:51 and 16:59 today.
We can not see any link or BGP outages at the router ZH2 to UZH, but we saw the PIM sessions go down at that time. Also we see that there was almost no traffic on the access link to UZH during that time frame. Thus we assume that there must have been a problem within the UZH infrastructure.
Between 18:09 and 18:12 we have observed another possible outage.
UZH confirms that they did have an unexpected outage around 16:50 while performing preparations for a planned maintenance between 18:00 and 19:30.
The connectivity losses during maintenance were expected for UZH, but not for PHZH.

Affected:

From 2009-07-02 18:09 until 2009-07-02 18:12
Impact: Total loss of connectivity
Sites/Services: UZH, PHZH


From 2009-07-02 16:51 until 2009-07-02 16:59
Impact: Total loss of connectivity
Sites/Services: UZH, PHZH

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