Compress Stac....Query?

Gangasgar.amula · ‎07-11-2005

Dear All,

Even have enabled compress stac...on some interfaces (Both Sides of point to point link)...we are not abled to compress the data...

------------- Data for Ref. --------------

CHN-ZO-3661>sh compress

Multilink6

Software compression enabled

uncompressed bytes xmt/rcv 0/0

compressed bytes xmt/rcv 0/0

1 min avg ratio xmt/rcv 0.000/0.000

5 min avg ratio xmt/rcv 0.000/0.000

10 min avg ratio xmt/rcv 0.000/0.000

no bufs xmt 0 no bufs rcv 0

resyncs 0

Additional Stacker Stats:

Transmit bytes: Uncompressed = 0 Compressed = 0

Received bytes: Compressed = 0 Uncompressed = 0

CHN-ZO-3661>

Regds/Sagar.

m.lammerse · ‎07-11-2005

Hi Sagar,

from the FAQ on compression:

Q. What are the three most common problems in the implementation of compression?

1. Mismatched software versions. The same version of code needs to be run on both sides of the link, and it needs to be Cisco IOS Software Release 11.3T or later. In particular, Cisco IOS Software Release 11.2 and 12.0 are non-interoperable for compression.

2. Compression is not enabled with the same parameters on both sides of a link. The hardware on either side does not need to be the same, but the encapsulation and type of compression must be.

3. An attempt to run "fancy queuing" and compression. Cisco only supports FIFO queuing with layer two payload compression. Weighted Fair Queuing is on by default, so to turn it off you need to issue the no fair-queue command.

If this doesn't answer your question, perhaps you could post some configs of the routers at either end of the link?

HTH

Marcel

m.lammerse · ‎07-11-2005

I also just found that 'show compress' is broken in older versions of IOS:

Q. When you type "show compress", you receive either no response or erroneous responses. Why?

A. Show compress is broken in earlier versions of Cisco IOS Software Release 12.0 code. Upgrade to Cisco IOS Software Release 12.0(7) (mainline, S, or T) for the fix (CSCdk15127 (registered customers only) ). This is a cosmetic problem only.

Don't know if that applies or not.