From: Carlos Trujillo Jimenez (nergal888@hotmail.com)
Date: Sun Sep 02 2007 - 16:31:55 ART
ohhh thanks a lot joe! so I divide 2560 (the bc value) by 8 and get the 320
value.
>From: "Joseph Brunner" <joe@affirmedsystems.com>
>To: "'Carlos Trujillo Jimenez'"
><nergal888@hotmail.com>,<ccielab@groupstudy.com>
>CC: <ctrujillo@magenta.cl>
>Subject: RE: CALCULATE FRAGMENT SIZE IN FRAME RELAY is there a formula??
>Date: Sun, 2 Sep 2007 12:26:47 -0700
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>The "fomula" for fragment size is just 1/8 (as you need to enter bytes) of
>your 10ms tc, which you set by setting bc.
>
>Whether what size fragment is good for what type of voice codec, is a
>discussion best for the voice IE lab, and its covered in Wendell Odom's QOS
>guide.
>
>-Joe
>
>-----Original Message-----
>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
>Carlos Trujillo Jimenez
>Sent: Sunday, September 02, 2007 11:59 AM
>To: ccielab@groupstudy.com
>Cc: ctrujillo@magenta.cl
>Subject: CALCULATE FRAGMENT SIZE IN FRAME RELAY is there a formula??
>
>Dear partners.
>
>Please I want you to confirm if I am correct or not in the answer of the
>following task.
>Scenario:
>
>Data and voice packets are traversing the frame relay circuit between RA
>and
>
>RB.
>Enable frame relay traffic shaping in a interface according to the provided
>CIR (256 K). and ensure all the shaping intervals are the smallest
>possible,
>
>and that a single packet cannot take more than one interval to be
>transmited.
>
>so in each router I enable frame relay traffic shaping, associating the
>following map-class
>
>map-class frame-relay SHAPING
>frame relay cir 256000
>frame relay bc 2560
>frame relay fragment 320
>
>For the last one "FRAME RELAY FRAGMENT 320" what is the formula for
>calculating it?? I mean I know that when larga packets exced the 320 size,
>they get compressed right?, but how do I get the 320 size?? is there a
>formula to calculate it??
>
>I noticed also when I do a "show traffic shape" without enabling
>fragmentation it shows me the following response:
>
>Interface Se0/0
> Access Target Byte Sustain Excess Interval Increment
>Adapt
>VC List Rate Limit bits/int bits/int (ms) (bytes)
>Active
>402 256000 320 2560 0 10 320 -
>403 256000 320 2560 0 10 320 -
>405 256000 320 2560 0 10 320 -
>406 256000 320 2560 0 10 320 -
>413 256000 320 2560 0 10 320 -
>506 256000 320 2560 0 10 320 -
>513 256000 320 2560 0 10 320 -
>401 256000 320 2560 0 10 320 -
>
>So my question is, for calculating the fragment size, I simply copy the
>value of the "byte limit" who shows me the show traffic shape output??
>
>Thanks a lot, and regards.
>
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