ROUTE::rttvar

Description

The scaled average variance of the smoothed round-trip time estimates for all TCP connections routed to the given destination.
ROUTE::rttvar has a value of 0 when there are no statistics available.
Note: the value is in 1/32’s of a millisecond. (Divide the returned value by 32 to get the actual round trip time in milliseconds.) Note: When used with the fastL4 profile, rtt from client/server needs to be enabled and the client and server need to be using TCP timestamps.

Syntax

ROUTE::rttvar <destination IP address>
ROUTE::rttvar <destination IP address> <gateway IP address>

ROUTE::rttvar <destination IP address>

  • The scaled average variance in smoothed round-trip times for connections to the given destination IP address.

ROUTE::rttvar <destination IP address> <gateway IP address>

  • The scaled average variance in smoothed round-trip times for connections to the given destination IP address reached through the given gateway.

Examples

when CLIENT_ACCEPTED {
   log local0. "rttvar is: [ROUTE::rttvar [IP::remote_addr]]"
}

when CLIENT_ACCEPTED {
   set Gateway 10.3.1.11
   #
   # assume that $Gateway is the gateway address for [IP::remote_addr]
   #
   log local0. "rttvar is: [ROUTE::rttvar [IP::remote_addr] $Gateway]"
}