Stubby Post – show ip protocols

I’ve seen and used the command before, but I’ve never really seen any use of the show ip protocols command until tonight while reading up for my ROUTE test.  There’s a lot of good information in the output, and, from the way the book is reading, this is a great candidate for use in a lab question.

To check it out a bit, I set up a small network with four routers connected only to a single Ethernet segment.  I set up one router to run EIGRP, OSPF, and BGP to each one of the other routers just so I could see the output for the different routing protocols.  Here’s what puked out after struggling with GNS for a few minutes.

R1#sh ip protocols Routing Protocol is "eigrp 1" 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 1 EIGRP NSF-aware route hold timer is 240s Automatic network summarization is in effect Maximum path: 4 Routing for Networks: 192.168.0.0 Routing Information Sources: Gateway Distance Last Update Distance: internal 90 external 170 Routing Protocol is "ospf 1" Outgoing update filter list for all interfaces is not set Incoming update filter list for all interfaces is not set Router ID 192.168.0.101 Number of areas in this router is 1. 1 normal 0 stub 0 nssa Maximum path: 4 Routing for Networks: 192.168.0.0 0.0.0.255 area 0 Reference bandwidth unit is 100 mbps Routing Information Sources: Gateway Distance Last Update Distance: (default is 110) Routing Protocol is "bgp 65001" Outgoing update filter list for all interfaces is not set Incoming update filter list for all interfaces is not set IGP synchronization is disabled Automatic route summarization is disabled Neighbor(s): Address FiltIn FiltOut DistIn DistOut Weight RouteMap 192.168.0.104 Maximum path: 1 Routing Information Sources: Gateway Distance Last Update Distance: external 20 internal 200 local 200

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R1#sh ip protocols Routing Protocol is "eigrp 1"   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 1   EIGRP NSF-aware route hold timer is 240s   Automatic network summarization is in effect   Maximum path: 4   Routing for Networks:     192.168.0.0   Routing Information Sources:     Gateway         Distance      Last Update   Distance: internal 90 external 170   Routing Protocol is "ospf 1"   Outgoing update filter list for all interfaces is not set   Incoming update filter list for all interfaces is not set   Router ID 192.168.0.101   Number of areas in this router is 1. 1 normal 0 stub 0 nssa   Maximum path: 4   Routing for Networks:     192.168.0.0 0.0.0.255 area 0 Reference bandwidth unit is 100 mbps   Routing Information Sources:     Gateway         Distance      Last Update   Distance: (default is 110)   Routing Protocol is "bgp 65001"   Outgoing update filter list for all interfaces is not set   Incoming update filter list for all interfaces is not set   IGP synchronization is disabled   Automatic route summarization is disabled   Neighbor(s):     Address          FiltIn FiltOut DistIn DistOut Weight RouteMap     192.168.0.104   Maximum path: 1   Routing Information Sources:     Gateway         Distance      Last Update   Distance: external 20 internal 200 local 200

The EIGRP section shows some important details, including what k-values are used, networks configured, and administrative distance (AD) of the various route types (internal and external).  The OSPF section shows the router ID, number of areas on the router, and number of area types (normal, stub, NSSA), as well as the networks configured and the AD.  The section regarding BGP shows summarization status, neighbors (along with any filter lists, distribution lists, local weights, and route-maps if they were configured), and the ADs again.

That’s good stuff to know.  I’ll have to put that command in usual repertoire.

Aaron Conaway

I shake my head around sometimes and see what falls out. That's what lands on these pages. If you have any questions, the best way to contact me is through Twitter at @aconaway.

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