[f-nsp] loopback interface as source for snmp

[Bruce Rodger]

Mario,

what version of code are you using?

It's a bug. It didn't exist in the 7.7 code train, but was there in 7.8.0a

It is resolved in 7.8.0d

>From my dialogue with Foundry:


"The 7.8.00d is released now the bug is #33598 .The description of the
bug is different, but this issue " SNMP uses a different interface IP
while responding to a get request " has been addressed in this issue. I
verified the issue has been fixed in 7800d code."

Bruce.



On Thu, 14 Apr 2005, Mario Apitz wrote:

> hi there,
>
> we're using big iron 4000 switches.
>
> i'd like to receive and address all management data for/from the router
> via one defined network interface. that's why i configured a loopback
> interface and defined this interfacce as source.
>
>
> ip router-id 10.10.1.1
> snmp-server community ..... ro
> snmp-server community ..... rw
> no snmp-server pw-check
> snmp-server trap-source loopback 1
> snmp-server host 10.10.11.25
> interface loopback 1
>  ip address 10.10.1.1 255.255.255.0
> !
> ip tftp source-interface loopback 1
> ip sntp source-interface loopback 1
>
>
> consequently, all snmp traps are send via loopback 1. that's fine so far.
> but nonetheless, all snmpqueries, i.e. snmpwalk, from snmp managemnet
> hosts are NOT answered by the loopback interface, but by the interface
> of the shortest route, i.e.:
>
> if i do a
>
> # snmpwalk -v 1 -c public 10.10.1.1 system
>
> i wont get an answer from 10.10.1.1 but from the interface with the
> shortest route to the snmp workstation.
>
>
> can anyone help? is there a way to bind the snmp answer to the loopback
> interface?
> thanks in advance for your help!
>
>
>
> kind regards,
> Mario Apitz
>
>

-- 
Bruce Rodger                      |Bruce.Rodger at strath.ac.uk  PGP key available
Network Manager, IT Services      |http://www.strath.ac.uk/IT/People/bruce.html
The University of Strathclyde     | +44 (0)141 548 3300
Glasgow G4 0LN, Scotland.         | Fax        553 4100