From: Mark Mahan (mmahan@caprock.com)
Date: Thu Nov 08 2007 - 12:44:49 ART
Like you said, it's a necessity for voice over IP over Frame-Relay on
smaller links. We use it all the time pushing voice and data over
bandwidth limited satellite links (combine choppy voice with the
inherent delay of satellite to get a really unhappy customer). For PPP
links at or under 768k you can turn on PP multilink and do fragmentation
and interleaving as well for the same benefits.
You can't and wouldn't need to fragment on Ethernet and I'm not familiar
with ATM but since it is a set 53 byte cell, it wouldn't be necessary
(at least the fragment part. I don't know enough about ATM to know if it
interleaves voice cells and data cells on the same PVC.)
As far as other practice applications; anything jitter sensitive
requires LFI though voice and maybe real time interactive video are all
I've ever seen that require it so far.
Mark Mahan
Network Engineer
-------------------------------
CapRock Communications
4400 S. Sam Houston Parkway E.
Houston, Texas 77048
Office: 832 668 2528
mmahan@caprock.com
www.caprock.com
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-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
iosluver@gmail.com
Sent: Thursday, November 08, 2007 8:18 AM
To: ccielab@groupstudy.com
Subject: Framgmentation & Interleaving
Hi,
Can someone please enlighten me on other practical applications of
Fragmentation & interleaving?
I have no production experience & my knowledge as far as this is
concerned is purely in a lab. I know it's a used strategy to interleave
voice packets which are typically small in between larger packets to
alleviate the effects of serialization delay caused by large packets
traversing a shared frame-relay circuit. My question is it practical,
required or even necessary to do this on ATM, Ethernet or PPP circuits?
Thanks
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