Cisco Command Christmas Calendar #20: show ip protocols

The show ip protocols command displays the parameters and current status of the active routing protocols. The information from this command is useful in debugging routing operations.

Router# show ip protocols
Routing Protocol is "eigrp 101"
  Outgoing update filter list for all interfaces is not set
  Incoming update filter list for all interfaces is not set
  Default networks flagged in outgoing updates
  Default networks accepted from incoming updates
  EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0
  EIGRP maximum hopcount 100
  EIGRP maximum metric variance 1
  Redistributing: eigrp 101
  EIGRP NSF-aware route hold timer is 240s
  Automatic network summarization is in effect
  Maximum path: 4
  Routing for Networks:
    10.4.9.0/24
  Routing Information Sources:
    Gateway         Distance      Last Update
  Distance: internal 90 external 170

Here are the details for the command output:

• Routing Protocol is "eigrp 101" specifies the routing protocol and AS number.
• Outgoing update filter list for all interfaces is not set indicates the outgoing filter list is not set.
• Incoming update filter list for all interfaces is not set indicates the incoming filter list is not set.
• Default networks flagged in outgoing updates and Default networks accepted from incoming updates specify how these network will be handled in both incoming and outgoing updates.
• EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0 specifes the K values used in EIGRP metric calculation.
• EIGRP maximum hopcount 100 indicates the maximum hop count in EIGRP.
• EIGRP maximum metric variance 1 indicates the EIGRP variance value used in unequal-cost load balancing.
• EIGRP NSF-aware route hold timer is 240s displays the route-hold timer value.
• Automatic network summarization is in effect specifies that automatic summarization is enabled.
• Maximum path: 4 indicates how many paths for the same route can be installed into the routing table.
• Routing for Networks: specifies the networks for which the routing process is currently injecting routes.
• Routing Information Sources: lists all the routing sources IOS is using to build its routing table. For each source, you will see the following displayed: IP address, administrative distance, and time the last update was received from this source.

Cisco documentation: show ip protocols