Data Compression
Page 28-12
Data Compression
Data compression allows you to get more data through the Frame Relay pipeline, further
enhancing cost benefits. A typical data compression ratio on the
WSX
board at the hardware
level is 4:1. In addition, the compression processor (
STAC 9705
) has its own memory (
DRAM)
that can store up to 100 compression histories (on a 4-port
WSX
) without degrading
performance. An 8-port
WSX
can store up to 200 compression histories without performance
degradation.
The
WSX
will only compress data if you enable compression through software and the
bridge/router on the other end of the connection supports standard Frame Relay (FRF.9) or
PPP (STAC-LZS) compression. (An Omni Switch/Router-to-Omni Switch/Router connection
would support compression.) Negotiation is necessary because if compressed data is sent to a
bridge/router that does not support compression, this bridge/router will not recognize the
data and will automatically drop the unrecognizable frames.
If you enable compression, the
WSX
will query the Frame Relay or PPP device on the other
end of the circuit to determine whether it supports compression. If it does, the
WSX
will
compress all data except frame
DLCMI
(management) data and PPP control messages. If it
does not support compression, data on that connection will be sent uncompressed. Refer to
either Chapter 29, “Managing Frame Relay,” or Chapter 30, “Point-To-Point Protocol,” for
information on enabling compression.
Note
Compression is not supported on the Omni
Switch/Router
WSX-S-2W
modules.
Summary of Contents for Omni Switch/Router
Page 1: ...Part No 060166 10 Rev C March 2005 Omni Switch Router User Manual Release 4 5 www alcatel com ...
Page 4: ...page iv ...
Page 110: ...WAN Modules Page 3 40 ...
Page 156: ...UI Table Filtering Using Search and Filter Commands Page 4 46 ...
Page 164: ...Using ZMODEM Page 5 8 ...
Page 186: ...Displaying and Setting the Swap State Page 6 22 ...
Page 202: ...Creating a New File System Page 7 16 ...
Page 270: ...Displaying Secure Access Entries in the MPM Log Page 10 14 ...
Page 430: ...OmniChannel Page 15 16 ...
Page 496: ...Configuring Source Route to Transparent Bridging Page 17 48 ...
Page 542: ...Dissimilar LAN Switching Capabilities Page 18 46 ...
Page 646: ...Application Example DHCP Policies Page 20 30 ...
Page 660: ...GMAP Page 21 14 ...
Page 710: ...Viewing the Virtual Interface of Multicast VLANs Page 23 16 ...
Page 722: ...Application Example 5 Page 24 12 ...
Page 788: ...Viewing UDP Relay Statistics Page 26 24 ...
Page 872: ...The WAN Port Software Menu Page 28 46 ...
Page 960: ...Deleting a PPP Entity Page 30 22 ...
Page 978: ...Displaying Link Status Page 31 18 ...
Page 988: ...Displaying ISDN Configuration Entry Status Page 32 10 ...
Page 1024: ...Backup Services Commands Page 34 14 ...
Page 1062: ...Diagnostic Test Cable Schematics Page 36 24 ...
Page 1072: ...Configuring a Switch with an MPX Page A 10 ...
Page 1086: ...Page B 14 ...
Page 1100: ...Page I 14 Index ...