Default Route injection in EIGRP

[parthiban chinnaya]

How to originate default route in EIGRP as long as I get the default route from my Service Provide through BGP.

I am not willing to do redistribution,summarization.

[Jon Marshall]

pchinnaya wrote:
How to originate default route in EIGRP as long as I get the default route from my Service Provide through BGP.
I am not willing to do redistribution,summarization.

Hmmm, you ask how to do something but then say you aren't willing to use the only methods i know of to inject a default-route into EIGRP - tricky

There is not equivalent of the OSPF default-information originate so with EIGRP you can either -

1) configure static and redistribute

2) redistribute BGP default into EIGRP

Your other alternative is to use the "ip summary-address eigrp ..." interface command but then you say you don't want summarization either.

So i am afraid you are out of luck, without using one of the above methods you can't do it.

Jon

[Peter Paluch]

Jon,

There is still the option of using the ip default-network command but it works only with classful network argument. The "default network" has to be already advertised in EIGRP and must be classful. Then it can be marked using the ip default-network command at a boundary router as a candidate for default route.

But the usability of this command is rather small with today's subnetted networks. You can create a fake classful static route (actually, this command creates it for you automatically if necessary) to work this around, but that one needs to be redistributed into the EIGRP, so in the end, there is at least so much work as directly redistributing a static route.

I actually wonder what keeps Cisco from implementing the default-information originate command for EIGRP. A similar code for RIP is implemented for ages.

Best regards,

Peter

[Mohamed Sobair]

Hi,

There are two ways to inject adefault route into Eigrp:

1- redistributing a default route into Eigrp (Which you dont want).

2- Configuring manual Summarization just to generate a default route with the command (IP summary-address Eigrp x 0.0.0.0 0.0.0.0).

This command would only inject a default route into Eigrp, however Cisco doesnt recommend using this command to inject a default route into Eigrp.

HTH

Mohamed