From: Schernau, Ed (Edward.Schernau@CITIZENSBANK.com)
Date: Thu Apr 22 2004 - 15:34:51 EDT
Hello all,
I am using an SNMP-based agent on a 480R with 2 GigE interfaces, ce0 and
ce1, configured for IP Multipathing. I do not have root, I did not set them
up. I can only connect to 1 of the aliased interfaces, the 2nd one, if I
connect to the first one, a snoop done on the machine shows my connections
to 1, but the replies coming out of the 2nd. I hope this is clear:
/etc/hosts info:
foo #grep `hostname` /etc/hosts
10.1.40.5 foo loghost
10.1.40.6 foo-dumb
10.1.40.7 foo1-2
10.1.40.8 foo1-2-dumb
10.1.55.75 fooc
ifconfig -a:
foo #/sbin/ifconfig -a
lo0: flags=1000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4> mtu 8232 index 1
inet 127.0.0.1 netmask ff000000
ce0:
flags=9040843<UP,BROADCAST,RUNNING,MULTICAST,DEPRECATED,IPv4,NOFAILOVER> mtu
1500 index 2
inet 10.1.40.6 netmask ffffff80 broadcast 10.1.40.127
groupname production
ce0:1: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
inet 10.1.40.5 netmask ffffff80 broadcast 10.1.40.127
ce1:
flags=9040843<UP,BROADCAST,RUNNING,MULTICAST,DEPRECATED,IPv4,NOFAILOVER> mtu
1500 index 3
inet 10.1.40.8 netmask ffffff80 broadcast 10.1.40.127
groupname production
ce1:1: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 3
inet 10.1.40.7 netmask ffffff80 broadcast 10.1.40.127
I can only point my SNMP browser at the 10.1.40.7 address. If I try and
connect to the .5 address, i.e. pointing at the 'hostname' address, the
responses from my SNMP query come from 10.1.40.7, which confuses intervening
firewalls mightily.
Any solution for this? I'm no multipathing expert - can I bind ANOTHER IP
to one of the NICs, that never floats, so that inbound request traffic to
that IP comes back from the same source IP ?
TIA, will summarize
Ed Schernau
Systems Management Specialist, ECC
Citizens Bank, East Providence Operations Center
401.282.1262 ed.schernau@citizensbank.com
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