[j-nsp] How to debug if the state of OSPF neighbor is ExStartonM20

Harshit Kumar harshit at juniper.net
Tue Mar 1 02:59:12 EST 2005


Ospf cares about ip mtu, so try that. 

-----Original Message-----
From: Eric Shih (TP/ERT) [mailto:eric.shih at ericsson.com] 
Sent: Monday, February 28, 2005 11:37 PM
To: Harshit Kumar; swm at emanon.com; juniper-nsp at puck.nether.net
Subject: RE: [j-nsp] How to debug if the state of OSPF neighbor is
ExStartonM20 

So if I want to change the MUT to fix the ospf problem, which part of
MTU( L2 or L3) should I modify ?

-----Original Message-----
From: Harshit Kumar [mailto:harshit at juniper.net]
Sent: Tuesday, March 01, 2005 3:33 PM
To: Eric Shih (TP/ERT); swm at emanon.com; juniper-nsp at puck.nether.net
Subject: RE: [j-nsp] How to debug if the state of OSPF neighbor is
ExStartonM20 


FE's ethernet Mtu is 1514 (1500 ip mtu) 

-----Original Message-----
From: juniper-nsp-bounces at puck.nether.net
[mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of Eric Shih
(TP/ERT)
Sent: Monday, February 28, 2005 10:54 PM
To: swm at emanon.com; juniper-nsp at puck.nether.net
Subject: RE: [j-nsp] How to debug if the state of OSPF neighbor is
ExStartonM20 

Hello Scott

  What is the default value on M20 ? We are using 4-port FE.

Eric

-----Original Message-----
From: Scott Morris [mailto:swm at emanon.com]
Sent: Tuesday, March 01, 2005 2:49 PM
To: Eric Shih (TP/ERT); juniper-nsp at puck.nether.net
Subject: RE: [j-nsp] How to debug if the state of OSPF neighbor is
ExStart onM20 


Depending on which L3 switch/IOS we're talking about, it's probably
because
the system mtu is defaulting to 1518 on the Cisco side.  Change ip mtu
on
the Cisco interface to 1500 and life should be good.

Scott
 

-----Original Message-----
From: juniper-nsp-bounces at puck.nether.net
[mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of Eric Shih
(TP/ERT)
Sent: Tuesday, March 01, 2005 1:27 AM
To: juniper-nsp at puck.nether.net
Subject: [j-nsp] How to debug if the state of OSPF neighbor is ExStart
onM20


Hello all

   Could someone tell me what shoud I do if the state of OSPF neighbor
is
ExStart on M20 ? The neighbor is Cisco L3 switch. Is it related to MTU
size
of the interface ? If it is, to what value should I modify ?
Thanks fo your support !!



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