Compression
Page 29-5
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
DRAM
that can
store up to 100 virtual circuits (on a 4-port
WSX
) without performance degradation. An 8-port
WSX
can store up to 200 virtual circuits without performance degradation. Support for more
than 100 compressed VCs (or 200 VCs on an 8-port
WSX
) is possible through swapping within
memory, but compression performance may decrease at these levels.
The
WSX
will only compress data if you enable Compression Negotiation through software
and the Bridge/Router on the other end of the Frame Relay virtual circuit supports standard
FRF.9 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, then this Bridge/Router will not recognize
the data and will automatically drop the unrecognizable frames.
If you enable Compression Negotiation, the
WSX
will query the Frame Relay device on the
other end of the circuit (according to
FRF.9
specifications) to see if it supports compression. If
it does, then the
WSX
compresses all data except
DLCMI
(management) data. If it doesn’t, then
data on that virtual circuit is sent uncompressed. See
Setting Configuration Parameters
on
page 29-22 for information on enabling compression.
Note
Compression is not supported on the 2 universal serial
port Omni Switch/Router
WSX
and Omni Switch/Router
WSX
modules.
Содержание Omni Switch/Router
Страница 1: ...Part No 060166 10 Rev C March 2005 Omni Switch Router User Manual Release 4 5 www alcatel com ...
Страница 4: ...page iv ...
Страница 110: ...WAN Modules Page 3 40 ...
Страница 156: ...UI Table Filtering Using Search and Filter Commands Page 4 46 ...
Страница 164: ...Using ZMODEM Page 5 8 ...
Страница 186: ...Displaying and Setting the Swap State Page 6 22 ...
Страница 202: ...Creating a New File System Page 7 16 ...
Страница 270: ...Displaying Secure Access Entries in the MPM Log Page 10 14 ...
Страница 430: ...OmniChannel Page 15 16 ...
Страница 496: ...Configuring Source Route to Transparent Bridging Page 17 48 ...
Страница 542: ...Dissimilar LAN Switching Capabilities Page 18 46 ...
Страница 646: ...Application Example DHCP Policies Page 20 30 ...
Страница 660: ...GMAP Page 21 14 ...
Страница 710: ...Viewing the Virtual Interface of Multicast VLANs Page 23 16 ...
Страница 722: ...Application Example 5 Page 24 12 ...
Страница 788: ...Viewing UDP Relay Statistics Page 26 24 ...
Страница 872: ...The WAN Port Software Menu Page 28 46 ...
Страница 960: ...Deleting a PPP Entity Page 30 22 ...
Страница 978: ...Displaying Link Status Page 31 18 ...
Страница 988: ...Displaying ISDN Configuration Entry Status Page 32 10 ...
Страница 1024: ...Backup Services Commands Page 34 14 ...
Страница 1062: ...Diagnostic Test Cable Schematics Page 36 24 ...
Страница 1072: ...Configuring a Switch with an MPX Page A 10 ...
Страница 1086: ...Page B 14 ...
Страница 1100: ...Page I 14 Index ...