Specifying a source interface

[efairbanks]

Does anybody know if there is a way to force a packet originating from a router to source from a specified interface? I am running into a situation where my carrier may not necessarily know about all of the subnets hosted by a router and I want to force network management traffic to originate from a backside interface located in the carrier's address space. Thanks for your help!

[thisisshanky]

Are you sending trap info ? If it is SNMP trap you can change the interface using,

snmp-server trap-source

http://www.cisco.com/en/US/partner/products/sw/iosswrel/ps1831/products_configuration_guide_chapter09186a00800ca66b.html

[efairbanks]

That solves half of it. Thanks. TACACS is my other concern.

[thisisshanky · Accepted solution]

ip tacacs source-interface

ip tftp source-interface

ip telnet source-interface

ip ssh source-interface

ip radius source-interface

http://www.cisco.com/en/US/partner/products/sw/iosswrel/ps1831/products_command_reference_chapter09186a00800e3efa.html#wp1017795

[efairbanks]

That looks like it will do it. Thank you very much :)