Hello Mathias !
In my opinion these are the possible (elegant :-) solutions,
in preferred order :
1. Use
"area 0 range 10.0.0.0 255.0.0.0 not-advertise"
on routers R1/R2/R4, virtual link R2/R4.
You need it on R4 as well, because as you said yourself,
R4 becomes member of area 0 when you add the virtual link.
This removes 10.x.x.x from R3 and R5, and they are both
connected thru F/R, in different areas.
2. Use
"area area-id filter-list prefix prefix-list-name out"
with prefix-list-name filtering net 10.0.0.0.
Use it on R1/R2/R4, virtual link R2/R4
This command was introduced in 12.0(15)S, but unfortunately
does not seem to be part of the main IOS train yet.
I haven't been able to test this one, but it looks "dead-on".
We still see 10.x.x.x in R4 though, because of the virtual link.
3. Use a tunnel between r2/r4, totally stub areas 1 and 2.
Tunnel endpoints in area 2.
This is really a lab-only solution, as Nigel also remarked.
But it works, and does not show the 10.x.x.x on R4...
I clearly prefer #1, because I interpret your requirement :
"The exercise is that the 10.x network must not be advertised into the Frame
Relay network."
to mean that R3 and R5 should not see 10.x.x.x. R4 sees it as soon as we
configure a virtual-link or a tunnel, because we then make R4 area 0 member.
If you were to use no tunnels and have different OSPF processes, you
could use one process per area, and do redistribution between them.
That would make the filtering really easy, but you would essentially change
your OSPF-execise to a redistribution exercise :-)
My two cents...
Jan Gunnik Hope
CCIE # 8221
-----Opprinnelig melding-----
Fra: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]Pe vegne av
Nigel Taylor
Sendt: 25. mai 2002 15:42
Til: [EMAIL PROTECTED]
Kopi: [EMAIL PROTECTED]; Spoerr, Mathias
Emne: Re: OSPF problem - 2nd try
MAthais,
I'm not sure if the ASCII art made the journey. but based on
what I believe you're trying to accomplish see Inline...
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