News - Sep 2003

Sep 12 2003 - We are experiencing problems with our external network connections. We are investigating the cause.

Sep 12 2003 - Our external network connectivity trouble cleared before 6:30PM. Data was collected for the period of the trouble for further investigation.

Sep 11 2003 - Email is being rejected for a few acccounts on mailserv. We are currently investigating this problem.

Sep 05 2003 - The Hospital network is experiencing some irregularities within the ITS internal router-to-router links. Work is underway to resolve these issues.

Sep 04 2003 - We are experiencing intermittent network problems with our off campus connections. More details to follow.

Sep 04 2003 - A failed hardware interface on an ATM switch has caused the intermittent network troubles we are experiencing. We are in the process of routing around the failed interface.

Sep 04 2003 - We should be at the end of this problem now. This morning we found that an OC-12 interface on our border ATM switch was cycling intermittently. For those who were following the routing problems via traceroute, it was the atm interface for router 31. This caused the loops that showed up between 31-32 and 41-42.

Recent attacks have targeted ATM LANE (LAN Emulation) interfaces, whether by intention or as a nasty side effect. We have been decommissioning ATM links in general and ATM LANE in particular. With the loss of the ATM interface to 31 today, we removed all internal ATM links within our core routers and reconfigured many internal links, installing additional backup paths. All test here show great improvement, with better traces than we have had in the past.

While testing via lots of traceroutes, we found today that there are a lot of dead spots out on the internet. Be advised that failure pinging or surfing to remote sites does not necessarily imply an internal UIC problem. Please try using traceroute to those sites to follow the flow and identify problem areas. If you log a problem, please include the trace.