From: Carlos Alberto Trujillo Jimenez (carlos.trujillo.jimenez@gmail.com)
Date: Fri Feb 29 2008 - 01:38:59 ARST
Hi Guido.
If you carefull analize, R1 is only doing layer 2 bridging to enable R1 AND
R3 to talk to each other, so for enabling only layer 2 functions and NO
LAYER 3 FUNCTION IN R1 you MUST enable BRIDGE CRB in router 1 ONLY.
Now. why IRB is enabled in R2 AND R3? because they need to route in their
BVI interfaces (LAYER 3) , when they send frames to each other physically
they muts first send to R1, R1 must have the same type of encapsulation to
understand the frames recibed from R2 TO R3 to send to each other.
2008/2/28, gui-doo laduchesse <gui_doo@hotmail.com>:
>
> Hi everybody,
>
> Is anybody understand the answer of the frame-relay bridging question of
> the
> Lab 20 Q 2.2 (IE)
>
> the point is
>
> R2
> (201 DLCI)
> |
> |
> |
> R1 s0/0.102--102---
> s0/0.103--103---
> |
> |
> |
> (DLCI 301)
> R3
>
>
> The question is to bridge in R1 (to simulate a p-t-p connexion between R3
> and
> R2)
> They said, don't use Bridge irb on R1
>
> On the solution, they activate bridge irb on R3 and R2 . I don't get this
> part.
>
> I was just trying to put CRB on R1 and I tought it was going to bridge
> with
> the frame-relay map bridge command...
>
>
> Guillaume
> Thanks
>
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