Behaviour of EIGRP

[amit-singh]

All,

I have 2 Leased lines between my HO to a branch office. We are running EIGRP between the sites. I am advertising a route/subnet 193.0.4.0 to my branch office. When I see the " show ip route 193.0.4.0 " at branch office it shows me only one entry via one of the link i.e of controller card ( badwidth 1984 KB). The other link I have is a serial card with a G.703 coverter and has a defualt bandwidth of 1544 KB.

Branch#show ip route 193.0.4.0

Routing entry for 193.0.4.0/24

Known via "eigrp 10", distance 90, metric 1804800, type internal

Redistributing via eigrp 10

Last update from 195.9.205.2 on Serial0/0:0, 00:04:44 ago

Routing Descriptor Blocks:

* 195.9.205.2, from 195.9.205.2, 00:04:44 ago, via Serial0/0:0

Route metric is 1804800, traffic share count is 1

Total delay is 20100 microseconds, minimum bandwidth is 1984 Kbit

Reliability 255/255, minimum MTU 1500 bytes

Loading 31/255, Hops 1

The Metric using the controller link is 1804800 and using the serial link is 2172416. FD is 1804800 installed it in the routing table and the other route becomes the feasible successor as it staifies the feasibility condition i.e RD < FD.

P 193.0.4.0/24, 2 successors, FD is 1804800

via 195.9.205.2 (1804800/28160), Serial0/0:0

via 195.9.201.2 (2172416/28160), Serial1/0

Question .. I tried using the varience as 3 and it didnt load balance on the links. neither it installed the other route in the routing table ???

When i manually make the bandwitdh to 1984 on all the links it installs the route and does the load-balancing

Routing entry for 193.0.4.0/24

Known via "eigrp 10", distance 90, metric 1804800, type internal

Redistributing via eigrp 10

Last update from 195.9.201.2 on Serial1/0, 00:00:01 ago

Routing Descriptor Blocks:

* 195.9.205.2, from 195.9.205.2, 00:00:01 ago, via Serial0/0:0

Route metric is 1804800, traffic share count is 1

Total delay is 20100 microseconds, minimum bandwidth is 1984 Kbit

Reliability 255/255, minimum MTU 1500 bytes

Loading 31/255, Hops 1

195.9.201.2, from 195.9.201.2, 00:00:01 ago, via Serial1/0

Route metric is 1804800, traffic share count is 1

Total delay is 20100 microseconds, minimum bandwidth is 1984 Kbit

Reliability 255/255, minimum MTU 1500 bytes

Loading 17/255, Hops 1

Why the route was not installed in the routing table after using the varience as 3 and load-balancing wasnot done.

regards,

-amit singh

[Harold Ritter · Accepted solution]

This should work even with a variance of 2. Was the route already installed when you configured the variance statement? If so, try to do a "clear ip route 193.0.4.0". It should install both next-hop in the RIB.

Hope this helps,

[amit-singh]

Hi Harold,

After clearing the route its done and has installed both the route entries. I have taken the bandwidth command out of the interface.

Thanks again..

regards,

-amit singh