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LZ compression
LZ compression is a lossless compression algorithm that uses a compression dictionary to replace
repeated data in the same message. The compression dictionary is carried in the compression result.
The sending device uses the sliding window technology to detect repeated data.
Compared with DRE, LZ compression has a lower compression ratio. LZ compression does not
require synchronization of compression dictionaries between the local and peer devices. This
reduces memory consumption.
Protocols and standards
• RFC 1323, TCP Extensions for High Performance
• RFC 3390, Increasing TCP's Initial Window
• RFC 2581, TCP Congestion Control
• RFC 2018, TCP Selective Acknowledgment Options
• RFC 3042, Enhancing TCP's Loss Recovery Using Limited Transmit
• RFC 2582, The NewReno Modification to TCP's Fast Recovery Algorithm
Command and hardware compatibility
Commands and descriptions for centralized devices apply to the following routers:
• MSR1002-4/1003-8S.
• MSR2003.
• MSR2004-24/2004-48.
• MSR3012/3024/3044/3064.
• MSR954(JH296A/JH297A/JH298A/JH299A/JH373A).
• MSR958(JH300A/JH301A).
Commands and descriptions for distributed devices apply to MSR4060 and MSR4080 routers.
WAAS configuration task list
For the WAAS feature to work correctly, make sure fast forwarding load sharing is disabled. For
information about fast forwarding load sharing, see Layer 3
—
IP Services Configuration Guide.
To configure WAAS, perform the following tasks:
Tasks at a glance
(Required.) Configuring a WAAS class
(Required.) Configuring a WAAS policy
(Required.) Applying a WAAS policy to an interface
(Optional.) Configuring TFO parameters
(Optional.) Configuring the TFO blacklist autodiscovery feature
(Optional.) Deleting all WAAS settings
(Optional.) Restoring predefined WAAS settings
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