MCI Fiber Outage - 10/17 ================ At 12:33EST on 10/17 we experienced a major MCI fiber outage on the east coast that affected the T3 and T1 backbones. A truck snagged an overhead fiber-line between Trenton and New Brunswick (New Jersey). This caused an extended loss of connectivity for several east coast circuits transiting the MCI junction in West Orange New Jersey. All ckts affected by the fiber cut are back on their original path as of 10/17/92 22:00 EDT. The following links were affected: Link Failure Outage Time ============ =============== C32<>C40 12:33-21:58 EDT C32<>C56 12:33-21:58 EDT C32<>C48 15:08-21:58 EDT C33<>E137 12:33-22:05 EDT C48<>C72 12:33-21:04 EDT C35<>C59 13:59-20:18 EDT C34<>E164 12:35-20:38 EDT nss8<>nss19 12:34-21:00 EDT nss8<>nss17 12:34-21:00 EDT nss5<>nss8 12:34-21:00 EDT nss8<>nss9 12:34-21:00 EDT nss9<>nss10 12:39-21:01 EDT Several safetynet links were put into service (on diverse circuit routes), and backup restoration circuits were provided by MCI during the fiber outage. There were some periods of routing instability with circuits going down and coming back up, and getting congested that caused temporary loss of connectivity for other network sites as well. According to our routing logs, the following T3 nodes experienced outages during this time period. Oct 17 05:20 E205 - down for 10 minutes Oct 17 05:56 E205 - down for 15 minutes Oct 17 04:18 E134,E133 - down for 2 hours and 50 minutes Oct 17 07:28 E128 - down for 10 minutes Oct 17 08:46 E146 - down for 50 minutes Oct 17 08:10 E136,E145 - down for 1 hour 50 minutes Oct 17 10:14 E136 - down for 20 minutes Oct 17 11:10 C56,C57,E146 - down for 20 minutes Oct 17 19:28 C32,E164 - down for 15 minutes Oct 17 20:03 C32 - down for 5 hours and 15 minutes Oct 17 16:34 E137 - down for 8 hours and 50 minutes Oct 18 01:53 E179 - down for 10 minutes Oct 18 05:54 E128,E179 - down for 15 minutes We are conducting a post-mortem with MCI to evaluate the impact of this outage on the network, and identify any potential areas for improvement in the future. Jordan