Setting metrics on redistributed routes into EIGRP

[jrhofman]

I have a configuration with two WAN routers connecting to a BGP cloud. These two routes connnect to a 6500 on the inside. I want one router to be primary for inbound and outbound traffic. We are

redistributing BGP into EIGRP. Under EIGRP we have:

!

Primary router

router eigrp 48

redistribute bgp 65147 route-map furman

network 10.147.1.0 0.0.0.255

default-metric 100000 11 255 1 1500

no auto-summary

no eigrp log-neighbor-changes

The furman route map is:

!

route-map furman permit 10

match ip address 3

set metric 100000 10 255 1 1500

Which metric will be used? the default or the route-map.

The backup WAN router has the same config but with higher delay statements in the furman route map.

Also, this WAN router connects to a 6500. I am assuming that the delay the MSFC will see for re-distributed BGP routes will be what the metric is set at (via route map) as well as the delay of the fastE. Is this correct?

I'm trying to decide if I should control routes from these WAN routes via the redistribute metrics or delay statements on the FastE interfaces.

[vcjones]

Default is only used if there is no other source of information (such as your route map), so the route map will be where the metric comes from.

Your approach (adjust the delay metric) is the same as I use when I'm trying to steer outgoing traffic for my clients. You are correct in your understanding that delays add, just make sure that the lowest bandwidth link is the same for both routes, or you could find the delay contribution being trumped by the bandwidth factor.

All else being equal, use redistribute metrics if its the outbound links which are the driving factor. Use FastE adjustments if its the network which is the driving factor. If all else is not equal, use whichever you are more comfortable with and will remember the rationale for down the road when changes are needed. Just keep in mind that weighting the FastE interface will affect ALL routes leading out that interface.

Good luck and have fun!

Vincent C Jones

www.networkingunlimited.com

[jrhofman]

Thanks for the info and conformation Vincent.