From: Angelo De Guzman (a.deguzman@wesolv.ph.fujitsu.com)
Date: Thu Nov 09 2006 - 22:34:00 ART
Yes. I agree with Victor, but its good to know other means of doing the test.
8-)
Victor Cappuccio (11/9/06 8:54 PM):
>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
>
>_______________________________________________________________________
>Subscription information may be found at:
>http://www.groupstudy.com/list/CCIELab.html
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