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How do I distribute a default route?

Running EIGRP.

See attachment.

I need to make the default route, from all routers, get to my firewall. If something fails in the ring I want it to fail over and still be able to reach the firewall.

Scenario: Using static default routes, router 4 has a primary of C and a secondary of D.

Router 5 has primary of E and secondary of D.

Router 6 fails.

Router 5 uses secondary route of D but router 4 still has primary of D. Traffic just bounces back and forth.

Is there another way to do default routes without using static?

1 REPLY
Hall of Fame Super Silver

Re: How do I distribute a default route?

Hello Paul,

EIGRP supports a specific command that is ip default network: actually an EIGRP route is flagged as capable to support a default route and propagated in the EIGRP domain.

In your case the link is the R1 -FW link

requirements:

ip subnet on R1-FW must be in a different major network not subnetted

a network command for this subnet must be present in R1 router eigrp config

see

http://www.cisco.com/en/US/docs/ios/iproute/configuration/guide/irp_ip_prot_indep_ps6350_TSD_Products_Configuration_Guide_Chapter.html#wp1056287

note: you still need a default static route on R1 pointing to FW

Hope to help

Giuseppe

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