On 8/12/10 4:01 PM, evang wrote:
On a router ethernet interface connected directly to a packetshaper, IM's
Interface Stats show a particular level of multicast traffic transmitted by the
packet shaper.
The router interface is reporting the same level of traffic, except as
broadcast.
If IM uses MIB-II data for those interfaces (counters for unicast and
non-unicast packets only) how is it differenciating?
And why does it characterize the traffic differently
When a device is polled with SNMPv2c or SNMPv3, InterMapper will
automatically use the counters ifInMulticastPkts, ifInBroadcastPkts,
ifOutMulticastPkts and ifOutBroadcastPkts, when those counters are
available, instead of the stock ifInNUcastPkts and ifOutNUcastPkts.
My guess is that you're polling the router with SNMPv2c or above, and
the packetshaper with SNMPv1? It's also possible that the packetshaper
may not support the separate multicast/broadcast counter in its SNMP
agent, and InterMapper has to rely on the non-unicast pkt counters alone.
--
Bill Fisher
Dartware, LLC
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