Accessing Counters - Indexing
IfIndex’s are not by required to be fixed for all time to a given slot/port.
- Only rule is that ifIndex can’t change from one media to another w/o disrupting sysUpTime
Routed vs Bridged Ports
- All ports that bridge have an ifIndex and dot1dBasePortNum assigned
- If a port does not perform bridging, no dot1dBasePortNum is assigned