Finding EIGRP Stub Router

[mahesh18]

Hi Everyone,

Happy New Year!

Say we have few Devices at Site A  running EIGRP.

How can i tell which Router is EIGRP stub?

By checking the config

eigrp stub connected.

Whoever device has above line we can confirm  it is stub router right?

Thanks

MAhesh

[John Blakley · Accepted solution]

Your neighbor command can tell you with detail:

sh ip eigrp neighbor detail

HTH,
John

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[mahesh18]

Hi John,

Thanks for reply.

I did

sh ip eigrp  neighbors   detail

EIGRP-IPv4:(510) neighbors for process 510

H   Address                 Interface       Hold Uptime   SRTT   RTO  Q  Seq

                                            (sec)         (ms)       Cnt Num

0   192.168.122.12          Tu1               10 2w2d      820  4920  0  41

   Version 12.2/1.2, Retrans: 0, Retries: 0, Prefixes: 6

   Topology-ids from peer - 0

EIGRP-IPv4:(38) neighbors for process 38

config shows

router eigrp 38

eigrp stub connected summary

so how can i confirm if this is stub device?

Thanks

MAhesh

[John Blakley · Accepted solution]

Here are a couple of other outputs from two routers in gns:

R1#sh ip proto

Routing Protocol is "eigrp 100"

  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

EIGRP stub, connected, summary

  Redistributing: eigrp 100

  EIGRP NSF-aware route hold timer is 240s

  Automatic network summarization is not in effect

  Maximum path: 4

  Routing for Networks:

    192.168.12.0

  Routing Information Sources:

    Gateway         Distance      Last Update

  Distance: internal 90 external 170

And the neighbor detail:

R2#sh ip eigrp neigh deta

IP-EIGRP neighbors for process 100

H   Address                 Interface       Hold Uptime   SRTT   RTO  Q  Seq

                                            (sec)         (ms)       Cnt Num

0   192.168.12.1            Fa0/0             11 00:01:21 1282  5000  0  3

   Version 12.4/1.2, Retrans: 0, Retries: 0

   Stub Peer Advertising ( CONNECTED SUMMARY ) Routes

   Suppressing queries

The neighbor will only show up if you're actually peered with the stub router itself. Is the output that you posted the stubs ip address? (192.168.122.12)

Happy New Year! btw

HTH,
John

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[mahesh18]

Hi John

Thanks for reply.

Now here is output from other router

sh ip eigrp nei detail

IP-EIGRP neighbors for process 510

H   Address                 Interface       Hold Uptime   SRTT   RTO  Q  Seq Typ

                                            (sec)         (ms)       Cnt Num

0   192.168.122.13          Tu1               14 2w3d       80  5000  0  25

   Version 4.0/3.0, Retrans: 2, Retries: 0

   Stub Peer Advertising ( CONNECTED SUMMARY REDISTRIBUTED ) Routes

   Suppressing queries

IP-EIGRP neighbors for process 37

IP-EIGRP neighbors for process 38

So this confirms that  nei  192.168.122.13 is stub router right?

Thanks

MAhesh

[John Blakley · Accepted solution]

Yes, 192.168.122.13 is configured as a stub router...

HTH,
John

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[Reza Sharifi · Accepted solution]

Hi Mahesh and happy new year to you too

Yes, by looking at the config you will be able to tell if the router is configured as stub.

Here are some the options you can use with eigrp stub

In the following example, the eigrp stub command is used to configure the router as a stub that advertises connected and summary routes:

router eigrp 1

network 10.0.0.0

eigrp stub

In the following example, the eigrp stub command is issued with the connected and static keywords  to configure the router as a stub that advertises connected and static  routes (sending summary routes will not be permitted):

router eigrp 1

network 10.0.0.0

eigrp stub connected static

In the following example, the eigrp stub command is issued with the receive-only keyword to configure the router as a receive-only neighbor (Connected, summary, and static routes will not be sent):

router eigrp 1

network 10.0.0.0 eigrp 

eigrp stub receive-only
 

More info:

http://www.cisco.com/en/US/docs/ios/12_0s/feature/guide/eigrpstb.html

HTH

Reza

[mahesh18]

Hi Reza & John,

Many thanks for helping me out again.

Regards

Mahesh