Command:

show ip protocols

Mode:

Router>


Syntax:

show ip protocols


Syntax Description:

This command has no arguments or keywords.


Command Description:

To display the parameters and current state of the active routing protocol process, use the show ip protocols EXEC command.

The information displayed by show ip protocols is useful in debugging routing operations. Information in the Routing Information Sources field of the show ip protocols output can help you identify a router suspected of delivering bad routing information.

 

Examples:

The following is a sample of output from the show ip protocols command, showing IGRP processes:

Router#show ip protocols

Routing Protocol is "igrp 109"
  Sending updates every 90 seconds, next due in 44 seconds
  Invalid after 270 seconds, hold down 280, flushed after 630
  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
  IGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0
  IGRP maximum hopcount 100
  IGRP maximum metric variance 1
  Redistributing: igrp 109
  Routing for Networks:
    198.92.72.0
  Routing Information Sources:
    Gateway         Distance      Last Update
    198.92.72.18         100      0:56:41
    198.92.72.19         100      6d19
    198.92.72.22         100      0:55:41
    198.92.72.20         100      0:01:04
    198.92.72.30         100      0:01:29
  Distance: (default is 100)

Routing Protocol is "bgp 1878"
  Sending updates every 60 seconds, next due in 0 seconds
  Outgoing update filter list for all interfaces is 1
  Incoming update filter list for all interfaces is not set
  Redistributing: igrp 109
  IGP synchronization is disabled
  Automatic route summarization is enabled
  Neighbor(s):
    Address          FiltIn FiltOut DistIn DistOut Weight RouteMap
    192.108.211.17                1
    192.108.213.89                1
    198.6.255.13                  1
    198.92.72.18                  1
    198.92.72.19
    198.92.84.17                  1
  Routing for Networks:
    192.108.209.0
    192.108.211.0
    198.6.254.0
  Routing Information Sources:
    Gateway         Distance      Last Update
    198.92.72.19          20      0:05:28
  Distance: external 20 internal 200 local 200
 

The following table describes significant fields shown in the IGRP display:

Table: Show IP Protocols Field Descriptions for IGRP Processes

Field Description

Routing Protocol is "igrp 109"

Specifies the routing protocol used

Sending updates every 90 seconds

Specifies the time between sending updates

next due in 44 seconds

Precisely when the next update is due to be sent

Invalid after 270 seconds

Specifies the value of the invalid parameter

hold down for 280

Specifies the current value of the hold-down parameter

flushed after 630

Specifies the time in seconds after which the individual routing information will be thrown (flushed) out

Outgoing update ...

Specifies whether the outgoing filtering list has been set

Incoming update ...

Specifies whether the incoming filtering list has been set

Default networks

Specifies how these networks will be handled in both incoming and outgoing updates

IGRP metric

Specifies the value of the K0-K5 metrics, as well as the maximum hopcount

Redistributing

Lists the protocol that is being redistributed

Routing

Specifies the networks for which the routing process is currently injecting routes

Routing Information Sources

Lists all the routing sources the Cisco IOS software is using to build its routing table. For each source, you will see the following displayed:

  •  

  • IP address
  • Administrative distance
  • Time the last update was received from this source.

     

The following is a sample of output from the show ip protocols command, showing EIGRP processes:

Router#show ip protocols


Routing Protocol is "eigrp 77"
  Outgoing update filter list for all interfaces is not set
  Incoming update filter list for all interfaces is not set
  Redistributing: eigrp 77
  Automatic network summarization is in effect
  Routing for Networks:
    160.89.0.0
  Routing Information Sources:
    Gateway         Distance      Last Update
    160.89.81.28          90      0:02:36
    160.89.80.28          90      0:03:04
    160.89.80.31          90      0:03:04
  Distance: internal 90 external 170
 

The table describes the fields that might be shown in the display.

Table: show ip protocols Field Descriptions for EIGRP Processes

Field Description

Routing Protocol is "eigrp 77"

Name and autonomous system number of the currently running routing protocol.

Outgoing update filter list for all interfaces...

Indicates whether a filter for outgoing routing updates has been specified with the distribute-list out command.

Incoming update filter list for all interfaces...

Indicates whether a filter for incoming routing updates has been specified with the distribute-list in command.

Redistributing: eigrp 77

Indicates whether route redistribution has been enabled with the redistribute command.

Automatic network summarization...

Indicates whether route summarization has been enabled with the auto-summary command.

Routing for Networks:

Networks for which the routing process is currently injecting routes.

Routing Information Sources:

Lists all the routing sources that the Cisco IOS software is using to build its routing table. The following is displayed for each source: IP address, administrative distance, and time the last update was received from this source.

Distance: internal 90 external 170

Internal and external distances of the router. Internal distance is the degree of preference given to EIGRP internal routes. External distance is the degree of preference given to EIGRP external routes.

The following is a sample of output from the show ip protocols command, showing IS-IS processes:

Router#show ip protocols


Routing Protocol is "isis"
  Sending updates every 0 seconds
  Invalid after 0 seconds, hold down 0, flushed after 0
  Outgoing update filter list for all interfaces is not set
  Incoming update filter list for all interfaces is not set
  Redistributing: isis
  Address Summarization:
    None
  Routing for Networks:
    Serial0
  Routing Information Sources:
  Distance: (default is 115)
 

The following is a sample of output from the show ip protocols command, showing RIP processes:

Router#show ip protocols


Routing Protocol is "rip"
  Sending updates every 30 seconds, next due in 2 seconds
  Invalid after 180 seconds, hold down 180, flushed after 240
  Outgoing update filter list for all interfaces is not set
  Incoming update filter list for all interfaces is not set
  Redistributing: rip
  Default version control: send version 2, receive version 2
    Interface        Send  Recv   Key-chain
    Ethernet0        2     2      trees
    Fddi0            2     2
  Routing for Networks:
    172.19.0.0
    2.0.0.0
    3.0.0.0
  Routing Information Sources:
    Gateway         Distance      Last Update
  Distance: (default is 120)


Misconceptions:

None

Related commands:
None

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