Intermittent BGP session resets on PE-LAG-01 every ~4 minutes. Hold-timer expire events in MRT logs.
Emeka Okafor
Intermittent BGP session resets on PE-LAG-01 every ~4 minutes. Hold-timer expire events in MRT logs.
Captured BGP debug during reset. Verified interface counters. Ran MTU path discovery with DF-bit set.
Set MTU to 9000 bytes on transit link. Enabled IP MTU 1490 on BGP TCP session. Cleared session.
Provider enabled 802.1q on their PE adding 4 bytes overhead, causing BGP TCP fragmentation.
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