Example A: LFR Tie Breaker

Example A as presented in VSB LFR Stack Examples depicts a dual failure in a closed interconnect configuration where the two surviving segments results in a LFR priority tie: a priority of 180 for each segment. Chassis 1 – 8 are configured for the default LFR priority of chassis ID * 10. The total LFR priority for stack segment chassis 1, 2, 7, and 8 is 180. The total LFR priority for stack segment chassis 3 – 6 is 180. The front-panel ports for the stack segment containing chassis 1, 2, 7, and 8 remain enabled because this stack segment contains the chassis with the highest LFR priority: chassis 8, priority 80. The front-panel ports for the stack segment containing chassis 3 – 6 are taken down.