Dual Metro E Circuits, Different Providers: Fail Over?

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Sep 25th, 2007
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I Currently have a 1000Mb Metro E port with Provider A that's in production. We recently got a second, 10Mb circuit with Provider B. Both of these links are transports from our location to a co-lo facility where our internet routers are.


I'm wanting to setup this second link for fail over. The two links will be terminated on 4500 switches (currently statically routing), and both connections have different vlans.


Any advice where to start with this?


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dgahm Tue, 09/25/2007 - 07:59
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Nathan,

A dynamic routing protocol like EIGRP or OSPF would solve your problem nicely. The gig link would normally carry all traffic, and failover would occur dynamically to your 10mb when needed.


An alternative would be PBR (policy based routing) with tracking, but dynamic routing would be much simplier.


Please rate helpful posts.


Dave

informationage Tue, 09/25/2007 - 09:28
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Thank for the reply!


I'll look into the routing protocols some more, my initial research showed that EIGRP would be much easier to implement giving the simpler setup I'm using. Any input?



dgahm Tue, 09/25/2007 - 09:35
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Yes, EIGRP is always the first choice for internal routing unless you have a need to interoperate with non-Cisco routers.

informationage Tue, 09/25/2007 - 11:19
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Is EIGRP compatible with inter-vlan routing, which is what I'm currently using?

informationage Tue, 09/25/2007 - 11:19
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Is EIGRP compatible with inter-vlan routing, which is what I'm currently using?

dgahm Tue, 09/25/2007 - 11:24
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Yes, though I am not a 4500 guru, I believe all code versions support EIGRP. If in doubt from config mode try:


router eigrp 100


If it takes the command, you can enter a network and be off and running.

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