The MPLS-OPS Archive

["C. J. Koch" <tirnanog_a@hotmail.com>]

Thanks, that helped me.
The faq I looked at was: http://www.mplsrc.com/mplsfaq.shtml
Cheers Chris

>From: Rajiv Asati <rajiva@cisco.com>
>To: "C. J. Koch" <tirnanog_a@hotmail.com>
>CC: mpls-ops@mplsrc.com
>Subject: Re: [MPLS-OPS]: cell-switced vs. frame-switched
>Date: Sun, 19 May 2002 15:36:29 -0400
>
>At 03:01 PM 5/19/2002, C. J. Koch wrote:
>>Hello,
>>
>>I have a question which I hope you can help me with.
>>I wasn't able to find an answer on the faq.
>
>Would you please let us know the FAQ URL ?
>
>
>>I read the following in an article:
>>
>>Cell-switched MPLS uses downstream-on-demand and
>>conservative label-retention.
>>Frame-switched MPLS uses unsolicited-downstream and
>>liberal-retention.
>>
>>Why is there this difference ?
>
>In cell-mode, the labels are nothing but PVCs, which can be quite limited
>(depending upon the platform). Hence, downstream-on-demand and conservative
>label-retention are required to use this limited PVC space appropriately.
>Whereas, frame-mode doesn't have such limitation since frame-mode uses
>4-byte field for labels.
>
>Hope that helps.
>
>Raj
>
>
>>Thanks a lot for any help you can give
>>Cheers Chris
>>
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>>
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