Re: ospf virtual link

From: steven owen (trueccie@xxxxxxxxx)
Date: Mon May 06 2002 - 14:12:22 GMT-3


   
Yeah,these two fe port are connected by switch ,and
they are in the same VLAN.

Thanks.
--- "Sean C." <Upp_and_Upp@hotmail.com> wrote:
> Hi Steven,
>
> I'm trying to follow your post but I'm a little
> confused. I'm not sure on
> how Area 2 is directly connected to Area 0. If r1
> and r2 only have
> connections to Area 0 via frame (and through Area
> 1), then Area 2 must be
> using Area 1 as Area 2's Virtual-link to Area 0.
> I'm not sure on how you
> want to keep up Area 2 if Area 1 becomes unattached
> to r3 (Area 0) - or for
> that matter how Area 1 can talk to Area 0 if R3s
> frame connection goes down.
>
> The error message you are receiving is similar to a
> message I received if I
> had 2 routers' TR ints connected by a mau and the TR
> ints were in different
> areas. An OSPF hello message was being broadcasted
> out one TR int and was
> received by the 2nd TR int and interpreted as trying
> to go to Area 0 (and
> thus needing the Virtual-link) . If your FastEth
> ports are connected by a
> switch then you might be receiving a similar message
> - an OSPF broadcast
> sent out one port in one area and received by a 2nd
> interface in a 2nd
> area - do you have vlans defined on the switch?
>
> Anyway, HTH,
> Sean
>
> ----- Original Message -----
> From: "steven owen" <trueccie@yahoo.com>
> To: "ccielab" <ccielab@groupstudy.com>
> Sent: Saturday, May 04, 2002 9:13 PM
> Subject: ospf virtual link
>
>
> I GOT r1,r2,r3 connected by FR,all the interfaces on
> FR are on area 1,r1 and r2 have an ethernet int each
> ,which is on area 2,r3 have an int on area 0.
> Can i build a vl between r1 ,r2 on area 2 to backup
> area 1 link if FR is down?
> and before i build vl,r1 always receives such the
> following error message:
> "%OSPF-4-ERRRCV: Received invalid packet: mismatch
> area ID, from backbone area must be virtual-link but
> not found from 20.4.1.1, FastEthernet1/0"
> but r2 doesn't have an int on area 0.Why?
>
>
> Thanks.
>
>



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