From: Gerry Hilton (gerry.hilton@rogers.com)
Date: Sat Mar 08 2003 - 17:25:19 GMT-3
Ok, good point, I see what you mean.
I am testing bridging with IPX at either end.
Thanks for the information,
Gerry
Brian Dennis wrote:
>Gerry,
>Just think about how a bridge works and you'll be able to solve this
>problem yourself. Will a standard bridge forward frames back out the
>same interface it is was received on? This is what you are asking the
>central bridge to do.
>
>Also are you testing with IP or using another protocol to test with? You
>can't bridge and route IP at the same time on a standard interface. You
>need a BVI to do that.
>
>Brian Dennis, CCIE #2210 (R&S/ISP Dial/Security)
>brian@labforge.com
>http://www.labforge.com
>
>-----Original Message-----
>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
>Gerry Hilton
>Sent: Friday, March 07, 2003 10:25 AM
>To: ccielab@groupstudy.com
>Subject: STP and FR
>
>If you have 3 routers configured for FR and transparent bridging, with
>the central router a multipoint interface and the end routers plain
>serial interfaces, does the central router have to be the root bridge?
> I cannot get it to work unless this is the case. If the central
>routers is not given a lower bridge priority then each of the end
>routers think that they are the root.
>
>1 end router:
>
>interface Serial0
> ip address 150.50.24.4 255.255.255.0
> encapsulation frame-relay
> no ip route-cache
> no ip mroute-cache
> frame-relay map bridge 401 broadcast
> bridge-group 1
>end
>
>Central router:
>
>interface Serial0.247 multipoint
> no ip route-cache
> frame-relay map bridge 107 broadcast
> frame-relay map bridge 104 broadcast
> bridge-group 1
>end
>
>2nd end router:
>
>interface Serial0
> ip address 150.50.24.7 255.255.255.0
> encapsulation frame-relay
> no ip route-cache
> no ip mroute-cache
> frame-relay map bridge 701 broadcast
> bridge-group 1
>end
>
>Thanks,
> Gerry
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