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New Member

Mulicast-Monitoring through SNMP

I'm looking for a simple way to monitor multicast-traffic. I only found one variable under the mib-2.ifMIB-tree, but it works only with sub-interfaces. Do you know mib-variables, which support multicast-issues ?

Thank you for your answer and best regards !


Re: Mulicast-Monitoring through SNMP

In IF-MIB, there are ifInMulticastPkts, ifOutMulticastPkts, ifHCInMulticastPkts, ifHCOutMulticastPkts. For HC counters, you need to use snmp v2c to poll them.

New Member

Re: Mulicast-Monitoring through SNMP

i know these variables, but it works only with sub-interfaces. if i start a request on an "normal" interface (f.e. Se0/0), i get no values returned.


Re: Mulicast-Monitoring through SNMP

Then you might run into a bug. There are quite a few bugs on snmp counters. What's the "show ver"?

New Member

Re: Mulicast-Monitoring through SNMP

Cisco Internetwork Operating System Software

IOS (tm) C2600 Software (C2600-I-M), Version 12.1(19), RELEASE SOFTWARE (fc1)

Copyright (c) 1986-2003 by cisco Systems, Inc.

Compiled Tue 04-Mar-03 04:18 by kellythw

Image text-base: 0x80008088, data-base: 0x8082EBB4

ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)

C26-MC-Tunnel uptime is 32 weeks, 4 days, 23 hours, 38 minutes

System returned to ROM by power-on

System image file is "flash:c2600-i-mz.121-19.bin"

cisco 2612 (MPC860) processor (revision 0x102) with 20480K/4096K bytes of memory.

Processor board ID JAB0351032K (3924849845)

M860 processor: part number 0, mask 49

Bridging software.

X.25 software, Version 3.0.0.

1 Ethernet/IEEE 802.3 interface(s)

1 Token Ring/IEEE 802.5 interface(s)

32K bytes of non-volatile configuration memory.

8192K bytes of processor board System flash (Read/Write)

Configuration register is 0x2101


Re: Mulicast-Monitoring through SNMP

It's bug CSCdu26480. Multicast and Broadcast counters were not implemented until late 12.2T code. There is another object, ifInNUcastPkts which is in ifTable and based on RFC1213 was implemented at very early stage of IOS.

So you can have two choices. Either upgrade to latest 12.2T code, currently 12.2(15)T11, or poll ifInNUcastPkts. Notice that even the IP only image needs 32MB RAM. It doesn't look like your router has enough memory.



Externally found enhancement defect: Resolved (R)

IF-MIB Broadcast/Multicast counter infrastructure supportPI


At the main interface there is no infrastructure support for the

Multicast/Broadcast counters of the IF-MIB. Support is to be provided

to get the counter values from the interfaces.