Re: OSPF misunderstanding

From: fwells12 (fwells12@xxxxxxxxxxx)
Date: Fri May 25 2001 - 01:24:02 GMT-3


   
Cheers Wayne. This is actually a home grown lab I am playing with to get
some idea of how router-on-a-stick works. For some reason I expected I
would need a virtual link on R5 and R6 because they were not directly
connected to any of the OSPF area 0 speakers. I guess that the
router-on-a-stick scenario does not make the OSPF areas undirectly
connected. I really just wanted a couple of you guys on the list to verify
it.

Cheers

----- Original Message -----
From: Wayne Gustavus <wgustavus@mentortech.com>
To: 'fwells12' <fwells12@hotmail.com>
Sent: Thursday, May 24, 2001 4:33 AM
Subject: RE: OSPF misunderstanding

> I think your answer is embedded in your description: "OSPF area 3 runs on
> all the vlan links between R2/R7/R5 and R6." This means that Area 3 is
> connected to Area 0 on R2, so no virtual link is necessary.
>
> BTW, this seems like a pretty neat scenario. Where did you get it? Is it
> part of a bootcamp or Fatkid lab?
>
>
>
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> > fwells12
> > Sent: Thursday, May 24, 2001 4:19 AM
> > To: CCIE newsgroup (E-mail)
> > Subject: OSPF misunderstanding
> >
> >
> > Here is something I just stumbled over and am a little
> > puzzled by. Network
> > config is like ascii picture below...
> >
> > R4
> > I
> > I
> > I
> > Frame----------------R2
> > I I
> > I vlan20
> > I I
> > R7 ------------------CAT5--------isl trunk------------R6
> > vlan70 I
> > vlan50
> > I
> > R5
> >
> > R2/R4 and R7 are connected over the frame cloud and OSPF area
> > 0 runs there
> > only. Vlans 20/50/70 are all trunked on R6 which performs
> > router on a stick.
> > R4 has an ethernet LAN running OSPF area 2. OSPF area 3 runs
> > on all the vlan
> > links between R2/R7/R5 and R6. Dilemma: R5 and R6 only have
> > OSPF area 3
> > defined under their OSPF processes yet I can still see
> > complete routes to all
> > other OSPF networks!! I am puzzled why I do not need a
> > virtual link on R5 and
> > R6 to R2 or R7 see the other OSPF networks. I can ping any
> > and all OSPF
> > networks from any and all routers. Anyone know why????
> >
> >
> > Cheers
> > **Please read:http://www.groupstudy.com/list/posting.html
**Please read:http://www.groupstudy.com/list/posting.html



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