#39 SNMP.pm: specifiy source host IP address

[Masahiro Inoue]

When PC has multi NIC or multi Virtual IP,
I want to specify
source host IP address for the sake of routing based on source IP
address.

Example:
$sess = new SNMP::Session(

SrcHost => $srcip, <==== specific Source IP
address
DestHost => $destip,
Version =>
'2c',
StateCheck => true,
StateOID =>
'sysObjectID'
);

Could you tell me how to modify the
source.
Best Regards,
Masa

[Simon Leinen]

Logged In: YES
user_id=9208

Any progress on this one? :-)

We are now in a situation where we have to use a "logical"
address as the source address in SNMP requests. Since our
management machines have multiple physical addresses, this
simplifies access lists and make life easier for some (brain
damaged) devices where every IP address that is configured
as a manager automatically receives all SNMP traps.

MRTG and Cricket already support setting the source IP
address (using ugly syntax, as always), but I cannot use
Net-SNMP anymore on certain of our devices, which makes me
sort of sad.
--
Simon.

[Thomas Anders]

Logged In: YES
user_id=848638

FYI: this is possible with the command-line apps through the
"clientAddr" config token. Are you looking for a SNMP.pm
solution only?

[Simon Leinen]

Logged In: YES
user_id=9208

For my own needs, the clientAddr option is sufficient.
Thanks for pointing me to it! Unfortunately it isn't
documented in the man page for snmp.conf(5) or any other man
page.

In general, I think there should be a way to specify the
client address from the command line, and also on a
target-by-target (or session-by-session) bases for APIs such
as SNMP.pm.

[Thomas Anders]

Logged In: YES
user_id=848638

"clientAddr" has been added to the documentation recently
and will appear in future releases. The wish to specify it
through other means has been noted. I'm lowering priority,
though.

[Cory Steele]

Hi posting here to ask if it's possible / or if there can be a feature added to allow different snmp communities or destination snmp servers to source trap from different interface ip addresses?
Let's say I have 1 network that's internal that has to hit SNMP servers out eth0 - i want it to source it from eth0 for those servers. Let's say I have eth1 and loopback1. I have an external SNMP server that I want to source the packet from loopback1, but go out eth1 with a route. Currently it will source it with eth1's ip address.

Any advice?