IT Answers » EIGRP

Cisco 3750 – EIGRP not on common subnet problen

Jlymn — Tue, 24 May 2011 14:43:56 +0000

I’m getting lots of messages on a router IGRP-IPv4:(50)(Default-IP-Routing-Table:50): Neighbor 10.13.1.251 not on common subnet for Vlan11

i tried to ping but 10.13.1.251 doesnt respond

show ip route shows 10.13.1.251 is directly connected on Vlan1. This must be off one of the trunk ports but how can i find out which port this neighbor connects on so i can fix the problem?

vlan 11 is 10.20.1.0 255.255.255.0.

Vlan 1 is 10.13.1.0 255.255.255.0.

So something is misconfigured with wrong ip address, but i can’t see what it is or where it connects to be able to fix. If i could find MAC address of device i could trace to a port and console on – any ideas?

Thanks

Reasons for using RIP instead of OSPF,EIGRP

yans112112 — Tue, 15 Mar 2011 02:41:57 +0000

Now a days also why we are using RIP instead of OSPF,EIGRP.Any one knows means please tell me.

hub and spoke using EIGRP

Rayb53 — Tue, 06 Apr 2010 11:41:26 +0000

I cant ping from one spoke to another, split-horizon has been disabled, any suggestions???

Propagating vlan’s over a eigrp?

Dialerstring — Tue, 09 Mar 2010 21:10:45 +0000

Hello,

I have 2 switches – one in building X and the other in building Y. The buildings are connected via fiber and eigrp is the protocol that’s setup between them. The buildings are p2p connections between 7200′s.

I need the Vlans to be propagated from switch “y” to switch “x” over the L3 connection. If the the link between the buildings were l2 – I could use VTP. Thanks!!

When do I use RIP, EIGRP, IGRP AND OSPF?

NetworkingATE — Thu, 17 Dec 2009 19:27:06 +0000

When do I use RIP, EIGRP, IGRP AND OSPF?

regarding Network

Virendra456 — Wed, 02 Sep 2009 07:30:18 +0000

How can i do practise of all levels if network practicals like ospf,

eigrp and bgp, isis, hsrp etc.

I neeed link where i can i get best webside so i cam guide my self.

Tricky EIGRP routing quesiton

Richardvoyageur — Fri, 15 May 2009 12:51:46 +0000

Hello Sudhanshu, I have a bit of a tricky question that I’ve been wondering about.

I’m going to be setting up over a dozen new ASA5510s in front of preexisting 2821 routers. I currently have EIGRP running in GRE tunnels between the sites.

I have heard that the ASAs do not support GRE tunnels…yet you need a GRE tunnel for EIGRP to work because of the multicast hellos.

What do you think is the best solution to the problem? I was thinking perhaps the EIGRP neighbor command could help me because of the fact that it sends unicast to static neighbors instead of multicast and I could get around the fact that I don’t have a GRE tunnel.

This has been dogging me for a while and I would really appreciate any help you could provide. Thank you,

Connecting 2, 3 or 4 sites over MPLS

ChicagoTechie — Thu, 29 Jan 2009 01:19:15 +0000

Hi. I have some routing experience but I don’t have much experience routing over a service providers MPLS network and had some questions..

Say I had 3 sites in different cities. I want to be able to route my data traffice to each site. I would like to use a MPLS provider.
Does the provider hand-off copper and/or fiber to me?
If fiber, is it usually single mode for anything above 10 megabits?
Would the hand-off be a layer 2 or 3 hand-off?
If layer 2, do I trunk with the providers directly connected interface/port?
If layer 3, do I “peer” with the providers directly connected interface with a routing protocol?
If I want to use EIGRP between my 3 sites, can I configure them to all be in the same AS?
I’m assuming I would need a layer2 and or layer 3 device at each of the locations to interface into the provider. What type of router/layer3 switch would be good for something like this? (Must be able to handle heavy traffic. Say, sustained 40 megabit throughput throughout the day.)

Does anyone know of or have any configuration samples/diagrams of the “customer side” of routing over MPLS? (I’ve seen a lot of docs on configuring MPLS but that’s not what I want to do.) My goal is to interface with the carrier to use their backbone and just pass/route my data-traffic to my different sites.

Any advice/pointers/help would be GREATLY appreciated!

Router configuration – Invalid input message configuring EIGRP

Ytechie — Wed, 05 Nov 2008 04:36:03 +0000

I enter the following command to configure eigrp using a wildcard mask, and I get the output “invalid input detected at” under the first character of the wildcard mask. This same command works on all other routers in the network. The command seems correct? Why this router?

R2(config)#router eigrp 100
R2(config-router)#no auto-summary
R2(config-router)#network 172.12.123.0 0.0.0.255
^
% Invalid input detected at ‘^’ marker.

Any ideas?

About routing protocol

Hacky — Tue, 11 Dec 2007 15:54:42 +0000

Hi Engineers

my name is vinod, i would like to no routing protocols ,like how rip,igrp,eigrp,ospf and bgp works and what is advantage and disadvantage of this protocols, specifically what is route poisening. i will appreciate for any kind of answer and any attachment or links will also help me.
thank u