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On Fri, Dec 30, 2005 at 12:29:51PM -0500, Adell Flourry, Jr. wrote: > Hi, > > Is anyone having trouble getting to various web sites off campus today? > In particular, microsoft windows update, and symantec. For the record, the network troubles on Friday were a result of some network maintenance being done by Northwestern University at a key Chicago POP. It had been announced that access to Abilene/Internet2 would be unavailable during the maintenance window (7 am - 3 pm CST), but we expected that other services would be unaffected. It appears that MSU's access to commodity Internet services was also affected, due to a combination of two errors in the backup routing which took over when the Chicago POP was down. MSU's traffic should have been routed via Detroit rather than Chicago, and as a result, the traffic took an extra hop to Chicago, then back to the correct destination via an IP tunnel. Unfortunately, the IP tunnel wasn't passing large IP packets properly. Merit resolved the problem for us around 1:30 pm Friday by fixing the errant route which was sending the traffic to Chicago while the Chicago POP was down. Doug -- Doug Nelson, Network Manager | [log in to unmask] Academic Computing and Network Services | Ph: (517) 353-2980 Michigan State University | http://www.msu.edu/~nelson/