Re: Multiple interfaces with the same IP address

Hi Jan,

I just ran into a problem with this functionality: the ipAddressTable
(in the ip-mib code) leaked memory; this is because the table did not
allow duplicate IP addresses.

I believe the ip-mib is using the ip-addresses as indexes into the
table, therefore it is a limitation of the MIB to not allow duplicates
(but I am not 100% sure).

We were doing some IP tunneling when we encountered this error.

Should I post my fixes (diffs) to net-snmp-bugs? or -coders?

MV

Jan Safranek wrote:
> Greetings,
>
> is it possible for SNMP to handle multiple interfaces with the same IPv4
> address? Net-snmp (5.4) throws error messages to log:
>
> $ ifconfig eth1 192.168.100.1 up
> $ ifconfig eth2 192.168.100.1 up
> $ /etc/init.d/snmpd start
> $ tail /var/log/messages
>
> error on subcontainer 'ia_addr' insert (-1)
> error on subcontainer '' insert (-1)
>
> Unfortunately it's quite common to have one IP shared among more
> interfaces - e.g. in PPTP server. The same applies to situation, where
> there are more interfaces without IP address (e.g. when channel bonding
> is configured).
>
> Regards
>
> --
> Jan Safranek
>
>
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--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Mike Varley -= SOMA Networks =-
mvarley@somanetworks.com 416-348-1578

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