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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical BGP Dampening
Greetings, I pose this question do its puzzling major. Two nights ago at approximately 10:20 PM PST I started receiving enough invalid routes that it caused my processor on router B to reach 100 percent utilization for 30 second interval every 3 min. While doing a debug on updates I discovered that router A was injecting routes from two of my transit connections into my tables and then removing them. When I checked router A there was a dampening list being created, but still Router A passed these routes on to Router B, but stranger still not on to Router C. When I check router B there were no dampened paths in the tables. My question is why didn't Router B dampen the invalid routes, and two why did Router A pass them along to Router B, and not Router C? Background Router C: 7513, dual processor, full memory IOS; Version 12.1(5c)E12, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1) Router B: 7507, dual processor, full memory IOS; Version 12.1(2)E, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1) Router A: 12012, dual processor, full memory IOS; GS Software (GSR-P-M), Version 12.0(21)ST2, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1) Route Sources: there are 4 full tables coming into Router A, 3 of equal preference and one of lesser preference. Yet the router still chose the flapping route???? If this is not worthy of the groups time could someone please contact me off list Mark V. A. Bown [email protected] Optigate Networks Inc. www.optigate.net
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