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Cisco: What does the  20 mean in part of the sho ip route statement "[110/20]"

Posted on 2013-12-05
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Last Modified: 2014-01-25
I'm working on understanding routing tables better and the lab I'm doing has a show ip route output:

0 E2    7.7.7.7 [110/20] via 10.12.0.2, 00:03:39, GigabitEthernet1/0
R1#

This is a redistributed route (EIGRP into OSPF), see attached:
Show-ip-route-question-with-topo.PNG
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Question by:dsterling
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by:Infamus
ID: 39698815
It is the metric for the route.
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Infamus earned 2000 total points
ID: 39698823
Here's quick explanation:

Routes are chosen and built in the routing table based on the routing protocol's administrative distance. The routes learned from the routing protocol with the lowest administrative distance are installed in the routing table. If there are multiple paths to the same destination from a single routing protocol, then the multiple paths would have the same administrative distance and the best path is selected based on the metrics. Metrics are values associated with specific routes, ranking them from most preferred to least preferred. The parameters used to determine the metrics differ for different routing protocols. The path with the lowest metric is selected as the optimal path and installed in the routing table. If there are multiple paths to the same destination with equal metrics, load balancing is done on these equal cost paths.
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