Fast Convergence on Metro Links

[mheick]

We are currently installing our second Metro link that connects both of our main data centers together.

One of the design requirements calls for fast convergence, in the 1-2 minutes range. More importantly we would like to have some sort of defense against brown outs and have look at OER.

I understand that OER is more of a WAN (Internet) technology and after investigation have deemed it not feesible for this design. With this being said, would I be better off relying on EIGRP and maintaining a sound QoS policy? Are there any tricks out there that would provide a faster convergence, or is this a case of keeping it simple?

[paolo bevilacqua]

Hi,

with default settings, eigrp convergence will be well below 1 minute.

If you want better, look at the standard routing protocol that is know to converge in less than 1 second with proper configuration.

Hope this helps, please rate post if it does!

[royalblues]

you can either use EIGRP or OSPF and the convergence will be well below the 1 minute range.

If configured properly, then EIGRP can install this second link as a Feasible successor and any failure would not even require a Dual Computation

Narayan