Policy Pages Reference : Networking Policy Settings : Path Selection
  
Path Selection
You enable a legacy path selection settings in the Path Selection page.
Riverbed recommends that you migrate your path selection rules. For detailed information, see Managing Path Selection.
You cannot push legacy path selection rules to SteelHeads running 8.0 or 9.0 and later. You cannot push legacy path selection rules to SteelHead EXs running 2.0 or 3.6 and later. For detailed information, see Managing Path Selection.
For path selection use case examples, see the SteelHead Management Console User’s Guide for SteelHead CX.
Complete the configuration as described in this table.
Control
Description
Enable Path Selection
Select the check box to enable path selection configuration.
Apply
Applies your settings.
Path Definition
Add a New Path
Displays the controls to define a path.
Name
Specify the path.
Probe Packet Settings
Remote IP Address
Specify the IP address of the remote host to ping when monitoring the path status.
DSCP
Select the DSCP marking for the ping packet. The marking is necessary in case the service providers are applying path selection metrics based on DSCP marking and it happens to be of a different type for each provider.
The default marking is reflect. Reflect specifies that the DSCP level or IP ToS value found on pass-through and optimized traffic is unchanged when it passes through the appliance.
Timeout
Specify how much time, in seconds, elapses before the system considers the path to be unavailable. The default value is 2 seconds.
Path selection uses ICMP pings to probe the paths. If the ping responses do not make it back within this timeout setting and the system loses the number of packets defined by the threshold value, it considers the path to be down and triggers an alarm.
Threshold
Specify how many timed-out probes to count before the system considers the path to be unavailable and triggers an alarm. The default is 3 packets.
This value also determines the how many probes the system must receive to consider the path to be available.
Path selection uses ICMP pings to monitor path availability. If the ping responses do not make it back within the probe timeout and the system loses the number of packets defined by this threshold, it considers the path to be down and triggers an alarm.
Add
Adds the new path.
Remove Selected Paths
Select the check box next to the name and click Remove Selected Paths.