Re: ifTable Extensions

[Sandra Durham <[e-mail]>]

> 
> Can anyone shed some light on the use of the ifGeneralGroup and ifPacketGroup
> They seem to be just repackaged ifTable objects.  They are not defined as 
> tables so it does not look like they can be retrieved from an agent.

ifGeneralGroup, and ifPacketGroup are part of the conformance statements
for the IF-MIB.  If you are unfamiliar with conformance issues,
you should probably go read rfc1904.

the basic deal here is that an agent implementation can be considered
conformant to the IF-MIB if it implements the appropriate
groups for a given interface media type.  And thus the ifTable will
have sparse rows. (as in if media type A requires only the
ifGeneralGroup, then the associated ifTable rows will return
noSuchInstance for things like ifInUcastPkts, etc).

Sandra Durham