Vyatta Network OS Documentation

Learn how to install, configure and operate the Vyatta NOS, which helps drive our virtual networking & physical platforms portfolio.

interfaces bridge <brx> spanning-tree forwarding-delay <delay>

Specifies the amount of time a bridge group spends in the listening and learning state after a topology change.

set interfaces bridge brx spanning-tree forwarding-delay delay
delete interfaces bridge brx spanning-tree forwarding-delay
show interfaces bridge brx spanning-tree forwarding-delay

The forwarding delay is 15 seconds.

brx
The ID of a bridge group.
spanning-tree
Specifies spanning tree configuration.
forwarding-delay delay
Specifies the length of time, in seconds, that an STP bridge port spends in the listening and learning state, before changing to the forwarding state after a topology change. The delay time ranges from 4 through 30 seconds.

The default value is 15 seconds, that is, the bridge group spends 15 seconds in the listening state, where it listens for spanning tree bridge protocol data unit (BPDU) packets, before changing to the learning state. It then spends 15 seconds in the learning state where it learns the source MAC addresses of other devices on the network, before changing to the forwarding state.

Note: The forwarding-delay applies to ports in STP mode and RSTP ports that are neither edge ports nor point-to-point ports.

Configuration mode


interfaces {
    bridge brx {
        spanning-tree {
            forwarding-delay delay
        }
    }
}
Note: The configuration enforces the following relationship between the forwarding-delay forwarding-delay and max-age spanning tree protocol timers:
  • 2 * ( forwarding-delay - 1 second) >= max-age

Use the set form of this command to specify the length of time that the bridge spends in the listening and learning state after a topology change.

Use the delete form of this command to restore the default forwarding-delay configuration.

Use the show form of this command to view the forwarding-delay configuration.