From: Jay Hennigan (jay@west.net)
Date: Wed Sep 24 2003 - 16:57:23 GMT-3
On Wed, 24 Sep 2003, Kenneth Wygand wrote:
> I have a hub-and-spoke Frame relay network I am looking to implement -
> 20 spokes and 1 hub with Frame Relay connections from the hub to each
> remote site. I also have a 56K synchronous serial RS232 line I must
> transport over this frame-relay connection from the hub to each of the
> remote sites (proprietary application). ALL REMOTE SITES RECEIVE THE
> SAME INFORMATION FROM THE HUB!
Is the sync-serial data strictly a one-way broadcast? No data back
from the remote sites to the hub, including no acknowledgements of
any kind?
> Is there a way I can do this within a Cisco box? Would the DLCI
> configuration be able to support these requirements? I'd like to only
> send one copy of the feed into the Cisco router (thus requiring only one
> serial connection) and then copy it 20 times. Cisco said this can be
> done within the frame relay DLCI configuration, but I am not so sure.
> I'm assuming that with this method, I'll still need to use 20 x 56K
> bandwidth on the frame relay link connected to my hub and that's not
> really a big deal to me.
True if the data is a continuous stream.
> I just don't want to have to have 20 serial
> interfaces on the Cisco Router to pump each individual feed (copied 20x)
> to each remote site.
> IP traffic will have to cross the link as well for Internet Access
> purposes. CIR at each remote site will probably be about 256K,
> including the 56K synchronous serial connection being carried over this
> link.
What's the size of the port at the hub, or are the spokes each getting a
separate PVC to an ISP? 20 x 56 = 1120 kbits/s. That doesn't leave
much room for Internet traffic is the hub is a T-1.
-- Jay Hennigan - CCIE #7880 - Network Administration - jay@west.net WestNet: Connecting you to the planet. 805 884-6323 WB6RDV NetLojix Communications, Inc. - http://www.netlojix.com/***Get your CCIE and a FREE vacation: Shop.GroupStudy.com***
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