Vyatta NOS documentation

Learn how to install, configure, and operate Vyatta Network Operating System (Vyatta NOS), which helps to drive our virtual networking and physical platforms portfolio.

RSPAN port mirroring configuration

RSPAN port mirroring requires the configuration of source and destination Vyatta router.


For traffic to flow from RSPAN source and destination vRouters running on Citrix XenServer systems, XenServer must use Linux bridge instead of Open vSwitch. Also, aging on the bridge corresponding to the vRouter network must be set to 0. This setting makes the entries in the forwarding table permanent.

  1. To check whether XenServer is using Open vSwitch or Linux bridge, use the cat command to view the network.conf file.

    # cat /etc/xensource/network.conf
  2. If Open vSwitch is in use, use the following command to switch to Linux bridge.

    # xe-switch-network-backend bridge
  3. Use the xe network-list command to find the bridge that corresponds to your network, similar to the following example.

    # xe network-list
    uuid ( RO)                : ...
              name-label ( RW): ...
        name-description ( RW): 
                  bridge ( RO): xapi10
  4. Use the brctl setageing command to set the aging for the bridge to 0.

    # brctl setageing xapi10 0

To change back to Open vSwitch, enter the following command.

# xe-switch-network-backend openvswitch