EIGRP related Issue

Unanswered Question
May 15th, 2012

Guys,

Pls help me regarding these logs I am unable to understand the problem---

May 15 04:49:24.746 GMT: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 172.22.74.6 (GigabitEthernet0/7) is up: new adjacency

May 15 04:50:44.396 GMT: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 172.22.74.6 (GigabitEthernet0/7) is down: retry limit exceeded

May 15 04:50:47.408 GMT: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 172.22.74.6 (GigabitEthernet0/7) is up: new adjacency

May 15 04:52:07.033 GMT: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 172.22.74.6 (GigabitEthernet0/7) is down: retry limit exceeded

May 15 04:52:07.695 GMT: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 172.22.74.6 (GigabitEthernet0/7) is up: new adjacency

May 15 04:53:27.337 GMT: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 172.22.74.6 (GigabitEthernet0/7) is down: retry limit exceeded

May 15 04:53:30.852 GMT: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 172.22.74.6 (GigabitEthernet0/7) is up: new adjacency

May 15 04:54:50.502 GMT: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 172.22.74.6 (GigabitEthernet0/7) is down: retry limit exceeded

May 15 04:54:53.648 GMT: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 172.22.74.6 (GigabitEthernet0/7) is up: new adjacency

May 15 04:56:13.321 GMT: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 172.22.74.6 (GigabitEthernet0/7) is down: retry limit exceeded

May 15 04:56:17.258 GMT: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 172.22.74.6 (GigabitEthernet0/7) is up: new adjacency

May 15 04:57:36.947 GMT: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 172.22.74.6 (GigabitEthernet0/7) is down: retry limit exceeded

May 15 04:57:40.657 GMT: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 172.22.74.6 (GigabitEthernet0/7) is up: new adjacency

May 15 04:59:00.326 GMT: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 172.22.74.6 (GigabitEthernet0/7) is down: retry limit exceeded

Someone pls help me......

I have this problem too.
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Cadet Alain Tue, 05/15/2012 - 23:56

Hi,

EIGRP is trying to send updates with multicast and as it is not working it tries with unicast a certain amaount of time( retry limit) and as it is still not working it tears down the adjacency.It brings the adjacency up again and the same stuff happens again and again.

Can you provide a topology as well as the running config from the 2 neighbours.

Regards.

Alain

ciscoamit_497 Wed, 05/16/2012 - 01:51

Hi Cadet,

I only have access to ISP router, so I cant see any logs in ISP router that is a neighbor  of problematic router, And configuration of ISP router under the EIGRP and interface are fine...I didn't find any problem in the configuration, above logs are provided by the Customer that is apearing on there own devices...

And I dont have the access of customer devices...

But I tried to contact to customer and whenever I will get any update from the customer will post my updates..

Thanks

John Blakley Wed, 05/16/2012 - 04:02

Along with what Alain stated, check your duplex settings on the interface. I had this problem the other day and found that it was negotiated at half duplex. Once I changed that the neighbors came up without a problem.

HTH,

John

Richard Burts Wed, 05/16/2012 - 05:39

Amit

If these logs are from the customer router then it suggests that they are receiving EIGRP hello messages from you that initiate the EIGRP neighbor process. Then they are trying to send updates to you but that they are not receiving EIGRP responses from you. I would suggest testing to see if there is any problem in connectivity. I would try ping to both the unicast  and the 224.0.0.10 addresses of the customer specifying your connected interface  as the source address. And I would suggest that they do the same test of pinging both your unicast and the multicast address.

Are you seeing any log messages on your router about this neighbor?

HTH

Rick

ciscoamit_497 Thu, 05/17/2012 - 07:38

Richard,

Thats the problem...Actually on ISP router I am not getting any logs related to the EIGRP...and We cant go beyond that..I mean cant ask customer about more information as I am unable to found any EIGRP logs on ISP device....

And the neighborship with the Customer router is OK.

Let me show.....the output from ISP routers---

Got the reply from all EIGRP neigbors---

rtr-mpls-az-arbnr01#ping 224.0.0.10

Type escape sequence to abort.
Sending 1, 100-byte ICMP Echos to 224.0.0.10, timeout is 2 seconds:

Reply to request 0 from 172.22.74.1, 1 ms
Reply to request 0 from 172.31.192.202, 1 ms
Reply to request 0 from 172.22.74.5, 1 ms


rtr-mpls-az-arbnr01#sh ip int br
Interface                  IP-Address      OK? Method Status                Protocol
GigabitEthernet0/0         172.22.74.2     YES NVRAM  up                    up
GigabitEthernet0/1         unassigned      YES NVRAM  up                    up
GigabitEthernet0/1.2993    172.31.232.46   YES NVRAM  up                    up
FastEthernet0/2/0          unassigned      YES unset  up                    up
FastEthernet0/2/1          unassigned      YES unset  administratively down down
FastEthernet0/2/2          unassigned      YES unset  administratively down down
FastEthernet0/2/3          unassigned      YES unset  administratively down down
Serial0/0/0:0              unassigned      YES NVRAM  administratively down down
Serial0/1/0:0              unassigned      YES NVRAM  administratively down down
Vlan1                      172.22.74.6     YES NVRAM  up                    up
Loopback10                 62.5.72.222     YES NVRAM  up                    up
Loopback11                 172.31.192.202  YES NVRAM  up                    up

U can see Eigrp neigbor is up for more than 6weeks on ISP device--

IP-EIGRP neighbors for process 100

H   Address                 Interface       Hold Uptime   SRTT   RTO  Q  Seq

                                            (sec)         (ms)       Cnt Num

0   172.22.74.1             Gi0/0             12 6w2d        1   200  0  229 <<<<<<<<<<<<<<<

Ping to Neighbor is 100%--

rtr-mpls-az-arbnr01#ping 172.22.74.1 si 1000 re 100

Type escape sequence to abort.
Sending 100, 1000-byte ICMP Echos to 172.22.74.1, timeout is 2 seconds:
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Success rate is 100 percent (100/100), round-trip min/avg/max = 1/1/8 ms

No EIGRP logs on device--


May 17 14:57:44.114 BST: bgp_cpu2timeout: seconds: 30000, slot: 3 for 5: 4% and 1: 4%

May 17 14:58:14.651 BST: bgp_cpu2timeout: seconds: 30000, slot: 3 for 5: 4% and 1: 3%

May 17 15:23:34.780 BST: bgp_cpu2timeout: seconds: 30000, slot: 3 for 5: 3% and 1: 3%

May 17 15:28:39.886 BST: bgp_cpu2timeout: seconds: 30000, slot: 3 for 5: 4% and 1: 3%

May 17 15:29:10.455 BST: bgp_cpu2timeout: seconds: 30000, slot: 3 for 5: 4% and 1: 3%

EIGRP Config on ISP Router

router eigrp 100

redistribute static route-map static-to-eigrp

network 10.130.98.0 0.0.0.255

network 172.22.1.0 0.0.0.255

network 172.22.74.0 0.0.0.3

network 172.22.74.4 0.0.0.3

network 172.31.192.202 0.0.0.0

no auto-summary

Now pls suggest everything working fine over here...now Wat I need to do??

Richard Burts Thu, 05/17/2012 - 13:14

Amit

Thank you for the additional information. I am confused about what is going on. The error message in your original post specifies that the neighbor address is 172.22.74.6. And from the new information that you provide that would be the address on vlan 1. But the EIGRP output that you sent says that the neighbor is on Gig0/0. If the neighbor is on Gig0/0 how are they seeing hello messages from 172.22.74.6 on vlan 1? Perhaps more detail of how your router is configured might be helpful.

Are you saying that you see no log messages from EIGRP at all or just that there are no log messages about this neighbor? If there are no log messages for EIGRP at all then the logging may be disabled. You might try this command under router eigrp and see if it produces log messages

eigrp log-neighbor-changes

HTH

Rick

evergreenajay Wed, 05/16/2012 - 06:31

Might. Be some issue of hello and hold timer

Sent from Cisco Technical Support iPhone App

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Posted May 15, 2012 at 11:49 PM
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