From: simon hart (simon.hart@btinternet.com)
Date: Tue May 31 2005 - 17:01:19 GMT-3
Hi Ralph,
Yes you could use cRTP, however this will only achieve compression on
certain types of traffic, basically real time protocol traffic. It is a
header compression algorithm, whereas stac is compressing everything,
cRTP will compress the IP/UDP/RTP header down to around 2 to 4 bytes,
however the payload remains uncompressed. RTP is usually used in the
tranport of Voice.
HTH
Simon
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of Ralph
Sherry
Sent: 31 May 2005 19:45
To: simon hart; Quetta Walla; ccielab@groupstudy.com
Subject: RE: Compression on low band link
I think you could also use CRTP.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/qos_c
/qcpart6/qcrtphc.htm
I am unfamiliar with when you would want to use stac over CRTP though.
Would anybody like the explain when you would use one over the other?
simon hart <simon.hart@btinternet.com> wrote:
The only compression algorithm you can use on an HDLC link is stac (the
Lempel-Ziv compression algorithm).
Enter the command compression stac directly on the interface at both ends of
the link.
The stac algorithm is heavy on the CPU, therefore if you are using a lot of
CPU already, use with caution. If this is the case, then you can change the
link encapsulation to PPP and then use predictor. The trade off here is
that you will not use so much CPU, but will have to have enough memory.
HTH
Simon
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Quetta Walla
Sent: 30 May 2005 10:49
To: ccielab@groupstudy.com
Subject: Compression on low band link
Hey,
What compression method is recommended on say 256k hdlc link?
And why?
Thanks
--
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