RE: IGPs and LMP's TE-link

["Liran Siglat" <liran@cwnt.com>]

Hi,

 

I'll try to clarify the question with an example:

 

We have 4 data-links a,b,c,d.

We define 2 TE-links: TEL1 containing a&b, TEL2 containing c&d.

Which components may the UNI use? for which purposes?

Which components may the IGP use? for which purposes?

Which components may the TE engine use for CSPF? for which purposes?

Which 'logical' interfaces will the local UNI-C have towards the remote UNI-C? a,b,c &d or TEL1 & TEL2?

 

Thanks, Liran.

-----Original Message-----
From: Zafar Ali [mailto:zali@cisco.com]
Sent: Wednesday, May 22, 2002 8:40 PM
To: Liran Siglat; ccamp@ops.ietf.org
Subject: Re: IGPs and LMP's TE-link

Dear Liran,

BTW, I've found your questions rather confusing. Any way, the following are the related comments,

• There is no difference (as such) between the way a TE link is represented by LMP and within IGP (with the exception of the level of details each protocol is concerned with).
• There is no direct relation between UNI 1.0 and IGP. However, once UNI connection(s) is (are) established, one may run IGPs on that (these) connections (either in a bundled or unbundled configuration). But this case does not require any standard specification.
• Multiple component links between UNI-C and UNI-N can be regarded as TE links without an IGP adjacency. But one can run LMP on such TE Links.

Hope this helps.

Thanks

Regards... Zafar 

At 08:06 PM 5/22/2002 +0300, Liran Siglat wrote:

Hi,

I have a question regarding the way LMP's TE-link is observed by IGPs.

In case a connection was established between 2 UNI-Cs over a TE-link (aggregating multiple data-bearing links), does an IGP running on the UNI-C see the TE-link as a new interface (with the capacity of all the data-links) or does it see multiple interfaces (each one corresponds to a data-link) ?

===============================================
Zafar Ali
Cisco Systems
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