From: Kenneth Wygand (KWygand@customonline.com)
Date: Wed Sep 24 2003 - 17:01:26 GMT-3
Jay,
1) Yes the sync data is simply a one-way broadcast
2) Yes the data is a continuous stream
3) IP Traffic will be minimal. They may bump the connection at the hub
up to two full T1s, depending on the results of the bandwidth
provisioning analysis.
Kenneth E. Wygand
Systems Engineer, Project Services
CISSP #37102, CCNP, CCDP, MCP 2000, CNA 5.1, Network+, A+
Custom Computer Specialists, Inc.
70 Suffolk Court
Hauppauge, NY 11788
(631) 864-6699 x1755
"It's not just about ending up where you want to be, it's about making
the most of the trip there."
-Anonymous
-----Original Message-----
From: Jay Hennigan [mailto:jay@west.net]
Sent: Wednesday, September 24, 2003 3:57 PM
To: Kenneth Wygand
Cc: ccielab@groupstudy.com
Subject: Re: Sending RS232 Data over Frame Relay PVC
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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