EIGRP variance command 1

[bobthecat]

Hi, I have a router with 5 possible routes to 10.20.0.0/22,
When I do a 'sh ip route 10.20.0.0' it shows the 2 best choices for that destination. The last link on the eigrp topology list below (10.3.3.1) is a direct link to 10.20.0.0 and the utilization is very low, how can I get this link to participate in the routing? Would a variance do the trick and if so what multiplier should i use.


Router1# sh ip eigrp topology 10.20.0.0/22
IP-EIGRP (AS 1): Topology entry for 10.20.0.0/22
State is Passive, Query origin flag is 1, 2 Successor(s), FD is 3019776
Routing Descriptor Blocks:
10.1.1.1 (Serial0/0.1), from 10.1.1.1 Send flag is 0x0
Composite metric is (3019776/2507776), Route is Internal
Vector metric:
Minimum bandwidth is 1024 Kbit
Total delay is 20310 microseconds
Reliability is 255/255
Load is 21/255
Minimum MTU is 1500
Hop count is 3
10.1.1.2 (Serial0/1.1), from 10.1.1.2, Send flag is 0x0
Composite metric is (3019776/2507776), Route is Internal
Vector metric:
Minimum bandwidth is 1024 Kbit
Total delay is 20310 microseconds
Reliability is 255/255
Load is 12/255
Minimum MTU is 1500
Hop count is 3
10.2.2.1 (FastEthernet0/0), from 10.2.2.1, Send flag is 0x0
Composite metric is (3022336/3019776), Route is Internal
Vector metric:
Minimum bandwidth is 1024 Kbit
Total delay is 20410 microseconds
Reliability is 255/255
Load is 12/255
Minimum MTU is 1500
Hop count is 4
10.2.2.2 (FastEthernet0/1), from 10.2.2.2, Send flag is 0x0
Composite metric is (3022336/3019776), Route is Internal
Vector metric:
Minimum bandwidth is 1024 Kbit
Total delay is 20410 microseconds
Reliability is 255/255
Load is 12/255
Minimum MTU is 1500
Hop count is 4
10.3.3.1 (Serial0/0.3), from 10.3.3.1, Send flag is 0x0
Composite metric is (10514688/28416), Route is Internal
Vector metric:
Minimum bandwidth is 256 Kbit
Total delay is 20110 microseconds
Reliability is 255/255
Load is 1/255 Bob ^^

 

[svermill]

Are all of your bandwidth statements on your interface correct? 10.3.3.1 has a minumum bandwidth of 256 kbit vs. 1024 kbit on all the others. This is why the composite metric is so much higher.

A variance of 4 would be required in your case. The traffic share would be pretty low relative to the other links.

http://www.cisco.com/en/US/tech/tk648/tk365/technologies_tech_note09186a008009437d.shtml

So you may want to consider manipulating the delay metric.

http://www.cisco.com/en/US/tech/tk648/tk365/technologies_tech_note09186a00800c2d96.shtml