I don't know what you mean by OSPF area rule, nor by the virtual link rule,
but:
In order to route from one of "not-backbone OSPF area" to another
"not-backbone OSPF area", you need to cross the backbone area (area 0). For
this reason, if one has two chained areas that do not "share" the backbone
area, one has to use virtual links. Virtual links have following
requirements:
It must be established between two routers that share the same area (in this
case, router B and router C).
One of these two routers must be connected directly to the backbone (in this
case, router B).
However, if, in your network, you only have these areas, it would be worth
to make area 1 as the backbone (area 0).
--
Charles Lehmann
""Vincent Chong"" a icrit dans le message news:
[EMAIL PROTECTED]
> Hi;
>
> Due to the mail system incompatiable, the message was truncated,
> I will provide more information to let you guys have more information.
>
> Area 0 is formed by Router A and Router B
>
> Area 1 is formed by Router B and Router C
>
> Area 4 is formed by Router C only.
>
> Router C set up a virtual link with Router A.
>
> The pesron who set up the topology said that it was a valid topoloy
without
> authenication
>
> But I am not agree, because the topology violate the OSPF area rule,
virtual
> link rule, this toplogy
> will not function as expected no matter authenication or not.
>
> For I am not a OSPF expert, I would like to hear any advice, suggestion,
> discussion.
>
> Any comment will be welcome.
>
> TIA
> Vincent Chong
>
> ""Vincent Chong"" Hi;
> >
> > The following scenario
> >
> >
> > [RouteA area0][area0 RouterB area1] RouterC area4]
> > |
> > |
> > |
> > |
> > |______________Virtual link_______________________|
> >
> > Does this topology is valid in OSPF?
> >
> > I belive that the configuration has topology error, but the
owener
> > said it was
> > working fine without authenication.
> >
> > For I am not familiar with Virtual link, ay comment are welcome?
> >
> > Best Rgds;
> > Vincent Chong
> > FAQ, list archives, and subscription info:
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> > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
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