11-13-2013 08:42 AM - edited 03-04-2019 09:34 PM
Hello!
I am using multiple ISR881s in hub and spoke scenario, all configured as "eigrp stub connected". I am wondering how many EIGRP routes can be received from two HUB neighbours and safely maintained by 881 (256MB of DRAM).
Thanks!
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11-23-2013 07:15 AM
I would think that 400 routes was well within the capabilities of an 881. And if no problems have been observed that sort of confirms it.
HTH
Rick
11-13-2013 08:49 AM
I do not believe that there is any particular number that would be the limit of how many EIGRP routes. The limit would depend on what else you have configured that is using memory on the router in addition to the EIGRP topology table and the IP routing table.
If you are doing hub and spoke with EIGRP stub connected at the spoke then a good practice is to limit the routes that are advertised from the hub to the spoke. This can easily be done with eigrp summary address commands on the hub or could also be done by implementing distribute lists in EIGRP on the hub. I have done this (both ways) and it works quite well.
HTH
Rick
11-23-2013 06:22 AM
Thanks, there is around 400 subnets in the routing table of the spoke.
There is a voip qos and dmvpn configuration on each stub 881 spoke and CPU sits at around 12-18% under the load time.
No problem was ever reported by any users. Wondering if 400 routes is too many for an 881 spoke or it is kind of Ok.
Here is sh ip route summary from one of the spokes:
sh ip route summary
IP routing table name is default (0x0)
IP routing table maximum-paths is 32
Route Source Networks Subnets Replicates Overhead Memory (bytes)
connected 0 8 0 480 1440
static 1 1 0 120 360
nhrp 0 0 0 0 0
eigrp 400 0 358 0 44940 64440
internal 8 16348
Total 9 367 0 45540 82588
11-23-2013 07:15 AM
I would think that 400 routes was well within the capabilities of an 881. And if no problems have been observed that sort of confirms it.
HTH
Rick
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