Looking at an SNMP walk over 184.108.40.206.220.127.116.11.218.104.22.168.1.3 (enterprise.cisco.ciscoMgmt.ciscoFcFeMIB.ciscoFcFeObjects.cffFcFeConfig.fcIfFLoginTable.fcIfFLoginEntry.fcIfNxPortNodeName) on a CISCO FC switch, I'm seeing results of the form:
'22.214.171.124.126.96.36.199.2188.8.131.52.1.3.x..y' => '0xWWN',
Through some walking, I've determined that
x is the switch port identifier used, for example, in 184.108.40.206.220.127.116.11.218.104.22.168.1.1. My question is: what are the  and
A full walk shows that
y is only used in the fcIfFLoginTable, but I'd still like to know its significance, as it appears unique.