Re: Header and Payload Compression

From: Scott Thornton (scthornton@gmail.com)
Date: Tue Nov 16 2004 - 20:32:04 GMT-3

Which payload compression method gets you the highest compression
rate? Or the most throughput? Has anyone had any good experiences
measuring this?

Thanks.

On Tue, 16 Nov 2004 15:05:47 -0800, Tony Schaffran
<groupstudy@cconlinelabs.com> wrote:
> Actually, if you understand what header and payload compression are doing,
> you will be able to answer you own question. There are times when one or
> the other are applicable and times when both are needed, especially when it
> comes to voice and data traffic and the QoS that will be needed to pass
> both.
>
> Yes, the router capabilities (cpu, etc) are a factor, but just because the
> router cannot handle the extra cpu cycles, that should not be a deciding
> factor. As you find situations where header and payload compression are
> needed, you will find just cause to upgrade the equipment.
>
> Tony Schaffran
> Network Analyst
> CCIE #11071
> CCNP, CCNA, CCDA,
> NNCDS, NNCSS, CNE, MCSE
>
> www.cconlinelabs.com
> Your #1 choice for online Cisco rack rentals.
>
>
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Ian
> Stong
> Sent: Tuesday, November 16, 2004 2:39 PM
> To: 'ccie2be'; 'Group Study'
> Subject: RE: Header and Payload Compression
>
> I've found that it really depends a lot on the link speed versus the
> capabilities (cpu, etc) of the router. In some cases there is little to no
> advantage to enabling both compressions methods. Especially true if the
> router gets bogged down doing the compression/decompression. In that case
> you could enable header and leave off payload compression. There are
> several factors to consider above and beyond cpu. What latency if any is
> added versus the savings in the size of the packet and so forth.
>
> Thanks,
>
> Ian
> http://www.ccie4u.com
> CCIE Lab Rack Rentals and Lab Scenarios starting at $20
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> ccie2be
> Sent: Tuesday, November 16, 2004 5:16 PM
> To: Group Study
> Subject: Header and Payload Compression
>
> Hi guys,
>
> Are there any situations or reasons header and payload compression shouldn't
> both be used at the same time on the same link?
>
> Also, when connecting a Cisco router to a non-cisco router, which
> compression
> method can be used? I think Cisco's implementation of Stac is proprietary,
> but I'm not sure about Predictor.
>
> TIA, Tim
>
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-- 
Scott C Thornton

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