Cisco router hardware advice needed..

haesu at haesu at
Fri Nov 22 03:06:49 UTC 2002


We currently run a small ISP network with two Linux based routers called ISis 
( to aggregate all the customers into the backbone.

There are two ISis routers and each ISis has two frame-relay T3's. All 
customers have a frame-relay T1 and we setup the PVC DLCI mappings over the 
frame cloud..

Now, the ISis routers are too much of a low quality and unacceptable for our 
ever-growing network. (Please don't reply back to me telling me how Linux for 
ISP routing is incorrect to begin with, etc, etc.. I understand and agree.. I 
never made the call the go with Linux based routers in the beginning..)

Anyway.. with that being said. We are in process of removing these ISis 
routers and replacing them with Cisco routers.

We are currently thinking of using Cisco 7206VXR's with at least an NPE300 per 
replacement of ISis. So that would be two Cisco 7206 routers, each with two 
frame-relay T3's. Each Cisco 7206 router will have about approximately 150 or 
so serial sub-interfaces for customer PVC mapping.. And each 7206 will have a 
100Meg FastEthernet connection to the backbone core router (since two T3's 
saturating only goes up to about 90Mbps).

Now the question is.. Can a Cisco 7200 handle the two frame-relay T3's with 
150 or so subinterfaces? My impression of a 7200 is that it is more designed 
for deployment at the border, not much at the edge/aggregation.. What do you 
people think? If it cannot handle such pressure, what other models do you guys 
suggest for us? We are looking at both Cisco and Juniper products, but we 
would like to use Cisco whenever we can, so Cisco is our preference.

Thanks in advance.


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