policy id connection wan receive def-buf-size
Sets the WAN receive buffer size for high-speed TCP on the specified policy.
Syntax
[no] policy id <id> connection wan receive def-buf-size <bytes>
Parameters
<id> | Policy ID number. |
<bytes> | WAN receive buffer size. The default value is 262140. |
Usage
To configure your WAN buffer, you must increase the WAN buffers to twice Bandwidth Delay Product (BDP) or 10 MB. To calculate the BDP WAN buffer size:
Bandwidth = 155000000 Mbps
Delay = 100 ms
For a link of 155 Mbps and 100 ms round-trip delay, set the WAN buffers to
2 * 155000000 * 0.1 / 8 = 3875000
To calculate the BDP for a link
bandwidth * delay / 8 / MTU = X
If X is greater than the default (256 KB), enable HS-TCP with the correct buffer size.
The no command option resets the buffer size to the default.
For detailed information about high-speed TCP, see the SteelHead Management Console User’s Guide.
Example
amnesiac (config) # policy id 1 connection wan receive def-buf-size 3875000
Product
Mobile Controller
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