RE: MTU Test

From: Yoshe Rionando (Rionando@swadharma.com)
Date: Fri Nov 10 2006 - 01:47:51 ART


Oke folks, i can do a test.Thank's

Yoshe Rionando Y.
PT. Swadharma Duta Data
Network & System Engineering Dept.
Senior Network Engineer
phone : 62 21 8318881
fax : 62 21 8297293
mobile : 62 8159084895

"Victor Cappuccio" <vcappuccio@desca.com>
Sent by: nobody@groupstudy.com
11/09/2006 07:54 PM
Please respond to
"Victor Cappuccio" <vcappuccio@desca.com>

To
"Angelo De Guzman" <a.deguzman@wesolv.ph.fujitsu.com>,
<ccielab@groupstudy.com>
cc

Subject
RE: MTU Test

Too boring to wait for the switch to take a life to reboot

R3(config-if)#do show int s1/1 | in MTU
  MTU 1500 bytes, BW 2048 Kbit, DLY 20000 usec, rely 255/255, load 1/255
R3(config-if)#mtu ?
  <64-18000> MTU size in bytes
R3(config-if)#mtu 300
R3(config-if)#do show int s1/1 | in MTU
  MTU 300 bytes, BW 2048 Kbit, DLY 20000 usec, rely 255/255, load 1/255
R3(config-if)#do clear ip ospf pro
Reset ALL OSPF processes? [no]: yes
R3(config-if)#do sho
00:18:41: %OSPF-5-ADJCHG: Process 1, Nbr 4.4.4.4 on Serial1/1 from FULL
to DOWN,
 Neighbor Down: Interface down or detached
00:18:41: %OSPF-5-ADJCHG: Process 1, Nbr 2.2.2.2 on Serial1/3 from FULL
to DOWN,
 Neighbor Down: Interface down or detached
R3(config-if)#do show ip ospf neigh

R3(config-if)#do db
00:18:45: %OSPF-5-ADJCHG: Process 1, Nbr 2.2.2.2 on Serial1/3 from
LOADING to FULL, Loading Don
R3(config-if)#do deb ip ospf ad
OSPF adjacency events debugging is on
R3(config-if)#
00:18:50: OSPF: Build router LSA for area 0, router ID 3.3.3.3, seq
0x80000006,
process 1
00:18:51: OSPF: Rcv DBD from 4.4.4.4 on Serial1/1 seq 0x70A opt 0x52
flag 0x7 le
n 32 mtu 1500 state EXSTART
=========================================================
00:18:51: OSPF: Nbr 4.4.4.4 has larger interface MTU
=========================================================

R3(config-if)#
00:18:51: OSPF: Rcv LS UPD from 2.2.2.2 on Serial1/3 length 64 LSA count
1
R3(config-if)#do u all
All possible debugging has been turned off
R3(config-if)#
00:18:54: OSPF: Rcv DBD from 4.4.4.4 on Serial1/1 seq 0x70A opt 0x52
flag 0x7 le
n 32 mtu 1500 state EXSTART
00:18:54: OSPF: Nbr 4.4.4.4 has larger interface MTU
00:18:54: OSPF: Retransmitting DBD to 4.4.4.4 on Serial1/1
00:18:54: OSPF: Up DBD Retransmit cnt to 2 for 4.4.4.4 on Serial1/1
00:18:54: OSPF: Send DBD to 4.4.4.4 on Serial1/1 seq 0x16B1 opt 0x52
flag 0x7 le

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Angelo De Guzman
Sent: Jueves, 09 de Noviembre de 2006 06:17 a.m.
To: ccielab@groupstudy.com
Subject: Re:MTU Test

On the switch (3550) you can change the system MTU. You need reload for
this to
take effect.

Yoshe Rionando (11/9/06 5:58 PM):
>Hi folks,
>How to make a test a wrong MTU configuration and how to debug that
wrong
>configuration in OSPF environment ?
>
>
>
>Yoshe Rionando Y.
>PT. Swadharma Duta Data
>Network & System Engineering Dept.
>Senior Network Engineer
>phone : 62 21 8318881
>fax : 62 21 8297293
>mobile : 62 8159084895
>
>_______________________________________________________________________
>Subscription information may be found at:
>http://www.groupstudy.com/list/CCIELab.html



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