From: Oliver Ziltener (ziltener@netcloud.ch)
Date: Fri May 09 2003 - 04:48:16 GMT-3
Hello again
the cmd erase startup-config will not set the mtu back to default value of
1500bytes.
The previous setting size stay in the config.
Note: My 3550 is running c3550-i5q3l2-mz.121-13.EA1a.bin
Oliver
-----Urspr|ngliche Nachricht-----
Von: Oliver Ziltener
Gesendet: Freitag, 9. Mai 2003 08:48
An: Connie Nie; ccielab@groupstudy.com
Betreff: AW: 3550 with svi: strange ospf neighborship problem[solved]
Thanks Connie
I set down the system mtu size to 1500 on the 3550 and the ospf neighbor were
up.
Thanks
Oliver
-----Urspr|ngliche Nachricht-----
Von: Connie Nie [mailto:CNie@EPLUS.com]
Gesendet: Donnerstag, 8. Mai 2003 23:55
An: ccielab@groupstudy.com
Betreff: FW: 3550 with svi: strange ospf neighborship problem
Default configuration on my 3550:
cat2#sh system mtu
System MTU size is 1504 bytes
cat2#
cat2#sh int vlan 30
Vlan30 is up, line protocol is up
Hardware is EtherSVI, address is 000a.b7f7.0700 (bia 000a.b7f7.0700)
Internet address is 172.16.34.10/22
MTU 1504 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:03, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue :0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute ouxtput rate 0 bits/sec, 0 packets/sec
1226 packets input, 186404 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
619 packets output, 42264 bytes, 0 underruns
0 output errors, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
Connie
-----Original Message-----
From: Volkov, Dmitry (IDS Canada) [mailto:dmitry_volkov@ca.ml.com]
Sent: Thursday, May 08, 2003 11:18 AM
To: Connie Nie; 'Oliver Ziltener'
Cc: ccielab@groupstudy.com
Subject: RE: 3550 with svi: strange ospf neighborship problem
Connie,
Where did You find MTU 1504 ?
3550#sh int vlan 1
Vlan1 is up, line protocol is up
Hardware is EtherSVI, address is 000a.f4d2.d100 (bia 000a.f4d2.d100)
Internet address is 192.1.1.100/24
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
3550#sh ip int vlan1
Vlan1 is up, line protocol is up
Internet address is 192.1.1.100/24
Broadcast address is 255.255.255.255
Address determined by non-volatile memory
MTU is 1500 bytes
Dmitry Volkov
CCIE # 10292
> -----Original Message-----
> From: Connie Nie [mailto:CNie@EPLUS.com]
> Sent: Thursday, May 08, 2003 9:28 AM
> To: 'Oliver Ziltener'; ccielab@groupstudy.com
> Subject: RE: 3550 with svi: strange ospf neighborship problem
>
>
> SVI has a MTU size of 1504 and router 1500. You need to set
> them to be the
> same.
>
> Connie
> -----Original Message-----
> From: Oliver Ziltener [mailto:ziltener@netcloud.ch]
> Sent: Thursday, May 08, 2003 4:27 AM
> To: ccielab@groupstudy.com
> Subject: 3550 with svi: strange ospf neighborship problem
>
> Hey all
> totally easy setup...
> 2 Routers (R5, R6) are connectet to vlan1 on 3550, vlan1 is
> speaking ospf.
> Ports on the 3550 are in "switchport mode access"
> Both router build up ospf adj but not with vlan1.
>
> 3550#show ip ospf neighbor
> Neighbor ID Pri State Dead Time Address
> Interface
> 192.168.10.5 1 EXCHANGE/DR 00:00:35
> 192.168.10.5 Vlan1
> 192.168.10.6 1 EXCHANGE/BDR 00:00:35
> 192.168.10.6 Vlan1
> 3550#
>
> R5#show ip ospf neighbor
> Neighbor ID Pri State Dead Time Address
> Interface
> 3.5.5.0 1 EXSTART/DROTHER 00:00:38 192.168.10.1
> Ethernet0/0
> 192.168.10.6 1 FULL/BDR 00:00:31 192.168.10.6
> Ethernet0/0
> R5#
>
> R6#show ip ospf neighbor
> Neighbor ID Pri State Dead Time Address
> Interface
> 3.5.5.0 1 EXSTART/DROTHER 00:00:39 192.168.10.1
> Ethernet0/0
> 192.168.10.5 1 FULL/DR 00:00:37 192.168.10.5
> Ethernet0/0
> R6#
>
> What is here the problem or we have here a bug?
>
> thanks
> Oliver
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