Tips and Pitfalls: CFS / IPFC

Common Commands

show feature session

switch(config)#feature abort

show cfs lock

show cfs regions

show cfs status

Key Points / Pitfalls

  • CFS Merge Master is lowest sWWN
  • device-alias, fscm and fc-redirect are CFS enabled by default
  • CFS over IP sends UDP keepalives using multicast UDP port 7546 for discovery
  • Once discovered switches send distribution information via unicast TCP 7546
  • ipv4 or ipv6 CFS ip distribution can be enabled but not both
  • Don’t forget to enable “ip routing” if necessary on a switch that traffic is transiting two networks
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