The short answer is no.
Server1 requests a file from Server2.
At router Chicago, a frame is created with a remote destination DLCI 100.
Encapsulated in that frame is the packet with a destination of Server 1.FR
is a layer two protocol. It only has info to forward the packet to the
remote switch with DLCI 100. This is defined by the PVC mapping.
Yes, shorter path would be to use the frame cloud to send it to DLCI 99
directly. However, DLCI 86 and DLCI 99 are DTE devices that are not aware of
each other.
If the frame was addressed to DLCI 99 directly, it would be dropped by the
carrier as a violation of the defined map. Since there are only ten bits
available for addressing, DLCI numbers are reused for different customers.
Chicago Miami
[Server2] [Server 1]
/\ /\
DLCI 99 DLCI 86
|____ ------|
| |
DLCI 100 DLCI 200
|/\-----{HUB SITE}-----/\|
Erik Mintz
----------
>From: "Aaron Ajello"
>To: [EMAIL PROTECTED]
>Subject: FR concept question [7:71263]
>Date: Tue, Jun 24, 2003, 1:05 PM
>
> This is probably a very simple concept question, but I've asked a couple
> people and haven't gotten a solid answer.
>
> If I've got two frame relay spoke sites connected point to point with a hub
> site and a server in one spoke site copies a file to a server in the other
> spoke site, does all the traffic pass through the hub site, or is it
> switched within the frame cloud?
>
> I guess what I'm wondering is does a frame cloud act somewhat like a lan,
> where initially packets will go through the default gateway and be routed
> and then the following packets will be switched?
>
> thanks.
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=71293&t=71263
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