From: MMoniz (ccie2002@tampabay.rr.com)
Date: Sat Aug 16 2003 - 15:19:54 GMT-3
It should be 1500. It looked like an MTU mismatch except the debugs would
normally show it.
22:38:05: OSPF: Send DBD to 133.5.5.5 on Serial0 seq 0xF5F opt 0x42 flag 0x7
len 32
22:38:05: OSPF: Retransmitting DBD to 133.5.5.5 on Serial0 [11]
22:38:05: OSPF: Rcv DBD from 133.5.5.5 on Serial0 seq 0x2122 opt 0x42 flag
0x7 len 32 mtu 1500 state EXSTART
22:38:05: OSPF: Nbr 133.5.5.5 has larger interface MTU
R3#
This is default on my 3550
VDL-CAT#sho in vlan 2
Vlan2 is up, line protocol is up
Hardware is EtherSVI, address is 000b.fdf0.ba00 (bia 000b.fdf0.ba00)
Internet address is 133.5.23.8/24
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
What code are you running on your Cat?
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
seonghui
Sent: Saturday, August 16, 2003 2:05 PM
To: 'John Matijevic'; ccielab@groupstudy.com
Subject: RE: cat3550 cannot establish ospf nei with router/s
Hi Matijevic,
MTU on router int fa0/0 is of course 1500 while MTU on vlan 10 is 1518. I
tried changing them but router doesn't allow me to do so.
any clue?
regards - SH
-----Original Message-----
From: John Matijevic [mailto:matijevi@bellsouth.net]
Sent: Sunday, August 17, 2003 1:55 AM
To: seonghui; ccielab@groupstudy.com
Subject: Re: cat3550 cannot establish ospf nei with router/s
Hello Seong,
Please check the mtu on the interface on the vlan interface as well as the
interface on the router to make sure that the mtu is the same. ex. sh ip int
e0, or sh ip int vlan 20.
Please post results.
Sincerely,
Matijevic
----- Original Message -----
From: "seonghui" <seonghui@vads.com>
To: "'John Matijevic'" <matijevi@bellsouth.net>; <ccielab@groupstudy.com>
Sent: Saturday, August 16, 2003 1:42 PM
Subject: RE: cat3550 cannot establish ospf nei with router/s
> Hi Matijevic,
>
> I tried that earlier, but the result is the same.
>
> regards - SH
>
> -----Original Message-----
> From: John Matijevic [mailto:matijevi@bellsouth.net]
> Sent: Sunday, August 17, 2003 1:36 AM
> To: seonghui; ccielab@groupstudy.com
> Subject: Re: cat3550 cannot establish ospf nei with router/s
>
>
> Hello Seong,
> Could you try putting ip ospf priority 0 under vlan interface on switch.
> Please post results.
> Sincerely,
> Matijevic
> ----- Original Message -----
> From: "seonghui" <seonghui@vads.com>
> To: <ccielab@groupstudy.com>
> Sent: Saturday, August 16, 2003 1:00 PM
> Subject: cat3550 cannot establish ospf nei with router/s
>
>
> > Hi group,
> >
> > I have been 'haunted' by this problem for the past two days. Here the
> > problem goes...
> >
> > I have a router conneted to a Cat3550. router fa0/0 (ip address
> > 10.10.10.1/24) is connected to port fas0/1 (vlan 10) on cat3550. I would
> > like cat3550 to establish ospf neighbour with the router and hence, I
> > created an Interface vlan 10 with ip address 10.10.10.2/24. However, the
> > router and the cat3550 just cannot form adjacency. Below is the debug
> > message:
> >
> > 07:28:30: OSPF: rcv. v:2 t:1 l:48 rid:10.10.10.1 aid:0.0.0.10 chk:7E15
> aut:0
> > auk: from Vlan10
> > 07:28:30: OSPF: Rcv hello from 10.10.10.1 area 11 from Vlan10 10.10.10.2
> > 07:28:30: OSPF: End of hello processing
> > 07:28:31: OSPF: rcv. v:2 t:2 l:32 rid:10.10.10.1 aid:0.0.0.10 chk:21B2
> aut:0
> > auk: from Vlan10
> > 07:28:31: OSPF: Rcv DBD from 10.10.10.1 on Vlan10 seq 0x2D3 opt 0x42
flag
> > 0x7 len 32 mtu 1500 state EXSTART
> > 07:28:31: OSPF: First DBD and we are not SLAVE
> > 07:28:31: OSPF: Retransmitting DBD to 10.10.10.1 on Vlan10
> > 07:28:31: OSPF: 10.10.10.1 address 10.10.10.2 on Vlan10 is dead, state
> DOWN
> > 07:28:31: %OSPF-5-ADJCHG: Process 1, Nbr 10.10.10.1 on Vlan10 from
EXSTART
> > to DOWN, Neighb or Down: Too many DBD retransmitions
> > 07:28:31: OSPF: Neighbor change Event on interface Vlan10
> > 07:28:36: OSPF: Rcv DBD from 10.10.10.1 on Vlan10 seq 0x2D3 opt 0x42
flag
> > 0x7 len 32 mtu
> > 1500 state DOWN
> > 07:28:36: OSPF: Nbr state is less than INIT
> >
> > I tried running other routing protocol between the switch and the
router,
> it
> > worked fine. Can some body please tell me what's the problem with ospf?
> >
> > Thanks,
> > SH
> >
> >
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