RE: Question about logical link in Link bundling

["Fong, Man Wing" <MFong@WhiteRockNetworks.com>]

Bala,

Correct me if I am wrong. For my understanding, a channelized OC-12
interface can support 12 channels (12 logical DS3 interfaces). Some even
capable of defining logical interface within those DS3 channel to support
T1. Then, each logical DS3 interfaces can create a (logical) link to the
remote routers' DS3 interfaces. The original used of the channelized OC-12
interface is to reduce the cabling and additional equipment cost and labor
cost at the central location. Since it is a channelized interface, I
believe, it would not allow the user to use it as an OC-12c interface. By
applying link bundling on that, now you can size your pipe whatever you want
upto the maximum BW (in this case, it will be STS-12c). In addition, using
O-UNI, you will get a true bandwidth on demand.

Just a thought.

Man Wing



 -----Original Message-----
From: 	Bala Rajagopalan [mailto:BRaja@tellium.com] 
Sent:	Tuesday, May 08, 2001 3:24 PM
To:	'Fong, Man Wing'; mpls@UU.NET; 'Kireeti Kompella'
Cc:	ccamp@ops.ietf.org
Subject:	RE: Question about logical link in Link bundling


Hello,

I'm a bit confused by the question. If you
had a channelized OC-12 link, wouldn't you
just advertise it with suitable Min Reservable
Bw values to indicate that it can carry lower
granularity traffic? In other words, why would
you introduce the notion of a "logical" link
in this case? 

REgards,

Bala Rajagopalan
Tellium, Inc.
2 Crescent Place
P.O. Box 901
Oceanport, NJ 07757-0901
Tel: (732) 923-4237
Fax: (732) 923-9804
Email: braja@tellium.com 

> -----Original Message-----
> From: Fong, Man Wing [mailto:MFong@WhiteRockNetworks.com]
> Sent: Monday, April 30, 2001 3:31 PM
> To: mpls@UU.NET; 'Kireeti Kompella'
> Cc: ccamp@ops.ietf.org
> Subject: Question about logical link in Link bundling
> 
> 
> Hi All,
> 
> From "draft-kompella-mpls-bundle-05.txt", it indicates that 
> multiple links
> between two LSRs can be bundled as a single link to improve 
> the routing
> scalability. Apparently, it can be used to bundle multiple links from
> multiple physical interfaces (e.g. multiple T1s, DS3s, OC-12s, OC-48s,
> etc...) to be a single link. However, can it be used to 
> bundle logical links
> like T1s in channelized T3, or DS3s, STS-3c in channelized 
> OC-12 interface?
> 
> Thanks.
> 
> Regards,
> Man Wing
> 
> 
>