Two Default Routes

S

staticz

Limp Gawd
Joined
Feb 19, 2008
Messages
184
I'm working on a potential network configuration but I ran into a bit of a mental road block. Basic idea is that there will be eight ISP lines coming in (via load two load balancers) to two separate ASA bundles (each getting 4 lines). These ASA bundles connect to the core router. What is the best way to setup the routes on the core?

I would like to be able to have both serving internet connections but understand that two default routes isn't going to work. Is there any way around this? I'm sure it is something simple, but I've never had to do anything quite like this!
 
Wouldn't you just configure the core with the regular quad 0 default route? I mean assuming the core device picks up both ASA's shouldn't it automatically load balance given the equal cost paths?
 
Liger88 said:
Wouldn't you just configure the core with the regular quad 0 default route? I mean assuming the core device picks up both ASA's shouldn't it automatically load balance given the equal cost paths?
Click to expand...

Can I put both default routes in then? ASA1 = 192.168.1.1 ASA2= 192.168.1.2

0.0.0.0 0.0.0.0 192.168.1.1
0.0.0.0 0.0.0.0 192.168.1.2
 
staticz said:
Can I put both default routes in then? ASA1 = 192.168.1.1 ASA2= 192.168.1.2

0.0.0.0 0.0.0.0 192.168.1.1
0.0.0.0 0.0.0.0 192.168.1.2
Click to expand...



I see what you're saying, totally brain farted with the mental map I was drawing (backwards). Setting up two default routes is acceptable, but from what I'm gathering only for purposes of setting a metric to use one as a backup for the other not load balancing. Doing a quick search some are saying to do so would require sharing routing table information with the ISP.

I'm curious to what others say since this is above my head and actually intriguing. I can talk to my professor tomorrow who manages a similar setup at the University he works for and see what he says just in case no answers arise.
 
Thanks for the info B1zz. I'm waiting to hear back from Cisco on best practices. I sent my request in too late and got stuck with a night shift tech!
 
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