Setting The Maximum Receive Or Transmit Buffer Share - Cisco 4700M Configuration Manual

Chapter 4 Configuring TCP/IP Normalization and IP Reassembly Parameters

Setting the Maximum Receive or Transmit Buffer Share

Caution
OL-16202-01
Configuring a Connection Parameter Map for TCP/IP Normalization and Termination
host1/Admin(config)# parameter-map type connection RATE-LIMIT
host1/Admin(config-parammap-conn)# rate-limit bandwidth 50000000
To return the behavior of the ACE to the default of not limiting the policy
bandwidth rate, enter:
host1/Admin(config-parammap-conn)# no rate-limit bandwidth 50000000
To improve throughput and overall performance, the ACE checks the number of
buffered bytes on each TCP and UDP connection against the configured buffer
setting before accepting new receive or transmit data. By default, the maximum
size of the receive or transmit buffer for each TCP or UDP connection is 32768
bytes. For large bandwidth and delay network connections, you may want to
increase the default buffer size to improve your network performance. To set the
maximum receive or transmit buffer size for each TCP and UDP connection, use
the set tcp buffer-share command in parameter map connection configuration
mode. The syntax of this command is as follows:
set tcp buffer-share number
The number argument is the maximum size of the receive or transmit buffer in
bytes for each TCP and UDP connection. Enter an integer from 8192 to
262143 bytes. The default is 32768 bytes.
If you are using the ACE to terminate SSL traffic, do not decrease the buffer share
value below the default value of 32 KB. With a buffer share value of less than
32 KB, SSL connections are significantly slower.
For example, enter:
host1/C1(config-parammap-conn)# set tcp buffer-share 16384
To reset the buffer limit to the default value of 32768 bytes, enter:
host1/C1(config-parammap-conn)# no set tcp buffer-share
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