From: Scott Morris (swm@emanon.com)
Date: Sun Oct 01 2006 - 21:32:16 ART
That depends on what you do with them. FRF11 is designed for VoFR, and will
not fragment any VoFR frames. FRF12 is more generic in nature, and makes no
specific delineation for voice or other packet types (IP is IP).
However, if you have voice in a priority (LLQ) queue on the interface,
anything in the priority queue will bypass the entire fragmentation scheme
and is therefore unaffected. There are some previous posts regarding this
if you want to search the archives for a little more detail that may be
slipping my mind at the moment.
HTH,
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
#153, CISSP, et al.
CCSI/JNCI-M/JNCI-J
IPExpert VP - Curriculum Development
IPExpert Sr. Technical Instructor
smorris@ipexpert.com
http://www.ipexpert.com
_____
From: sabrina pittarel [mailto:sabri_esame@yahoo.com]
Sent: Sunday, October 01, 2006 3:37 PM
To: Scott Morris; ccielab@groupstudy.com
Subject: Re: Q. on frame relay fragmentation
I see...
are then voice packets automatically excluded from fragmentation or should I
manually set the fragment size to be bigger then the voice packets...is the
this behavior different for different types of fragmentation (FRF.12 FRF.11
or cisco)?
Sabrina
----- Original Message ----
From: Scott Morris <swm@emanon.com>
To: sabrina pittarel <sabri_esame@yahoo.com>; ccielab@groupstudy.com
Sent: Sunday, October 1, 2006 11:23:10 AM
Subject: RE: Q. on frame relay fragmentation
Because it will introduce extra latency into the mix, and voice traffic is
latency-sensitive. So you don't want to have choppy voice.
That and voice packets are typically small enough that it makes little sense
to fragment them. Fragmentation is done to make all things play better with
each other on slower speed links. And since voice (or SNA or some other
stuff) is generally the reason for fragmentation, it wouldn't serve much
purpose to fragment that traffic as well.
HTH,
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
#153, CISSP, et al.
CCSI/JNCI-M/JNCI-J
IPExpert VP - Curriculum Development
IPExpert Sr. Technical Instructor
smorris@ipexpert.com
http://www.ipexpert.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
sabrina pittarel
Sent: Sunday, October 01, 2006 2:17 PM
To: ccielab@groupstudy.com
Subject: Q. on frame relay fragmentation
Hi,
I was reading about frame relay fragmentation and everywhere in the
documentation I read that voice packets should not be fragmented...
Why is
that?
Sabrina
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