From: Steven Hodgson (steven.hodgson@inxi.com)
Date: Fri Dec 14 2007 - 12:09:02 ART
They aren't required to form a neighbor relationship, but they can cause
problems in the relationship staying up. If they are different enough,
one router will be expecting to get hellos and never get them. It will
think the neighbor is down. Then it will finally get a hello and it
will bring the relationship back up. This will repeat ad nauseum.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
vignesh sethuraman
Sent: Friday, December 14, 2007 1:49 AM
To: ccielab@groupstudy.com
Subject: Hello Timers Mismatch
Hello,
I have connected 2 routers R1 and R2 using 2 serial links. I changed
the default value of hello timers and hold timers in one of the
interface only at R1 router. I thought neighborship will be down due to
timers mismatch, but still it is up in both the interfaces.
R1;
interface Serial1/0
ip address 155.1.0.5 255.255.255.0
ip hello-interval eigrp 100 3
ip hold-time eigrp 100 9
encapsulation frame-relay
frame-relay map ip 155.1.0.4 405 broadcast
no frame-relay inverse-arp
end
interface Serial1/2
ip address 155.1.45.5 255.255.255.0
router eigrp 100
network 155.1.0.5 0.0.0.0
network 155.1.45.5 0.0.0.0
network 155.2.0.5 0.0.0.0
no auto-summary
R2:
interface Serial1/0
ip address 155.1.0.4 255.255.255.0
encapsulation frame-relay
frame-relay map ip 155.1.0.5 504 broadcast
no frame-relay inverse-arp
end
interface Serial1/2
ip address 155.1.45.4 255.255.255.0
router eigrp 100
network 155.1.0.4 0.0.0.0
network 155.1.45.4 0.0.0.0
network 155.2.0.4 0.0.0.0
no auto-summary
R2#sh ip eigrp neighbors
IP-EIGRP neighbors for process 100
H Address Interface Hold Uptime SRTT RTO Q
Seq
(sec) (ms) Cnt
Num
2 155.1.0.4 Se1/1 176 00:00:08 36 216 0
68
1 155.1.45.4 Se1/2 12 00:00:16 22 200 0
67
R1#sh ip eigrp neighbors
IP-EIGRP neighbors for process 100
H Address Interface Hold Uptime SRTT RTO Q
Seq
(sec) (ms) Cnt
Num
0 155.1.0.5 Se1/0 8 00:00:06 1 4500 2
0
1 155.1.45.5 Se1/2 14 00:00:04 36 1140 0
102
Could you please explain why the neighborship is up on the mismatched
interface.
Thanks,
Vignesh
---------------------------------
Unlimited freedom, unlimited storage. Get it now
This archive was generated by hypermail 2.1.4 : Tue Jan 01 2008 - 12:04:30 ARST