User's Guide

Chapter 12: Bridge Interface Configuration
TR0190 Rev. A1 73
12.2 Bridging Parameters
Two parameters are available for controlling how the bridge mode operates: forwarding delay
and Spanning Tree Protocol control.
The forwarding delay sets how long, in seconds, the EL-500 will watch traffic before
participating. If there are no other bridges nearby the EL-500 this value can be set to 0. When
the DHCP mode for the bridge interface is set to ‘client’, the forwarding delay will be
automatically set to 15 to avoid DHCP requests timing out.
The EL-500 supports the Spanning Tree Protocol (STP), which is used to ensure a loop-free
topology for any bridged LAN. STP support can be disabled or enabled.
CLI
The forwarding delay is set with the ‘forwarding_delay’ parameter in the ‘br0’ interface. The
delay is specified in seconds.
> use br0
br0> set forwarding_delay=5
Spanning Tree Protocol state is set with the ‘stp.enable’ parameter in the ‘br0’ interface. Set
this parameter to ‘yes’ to enable it and to ‘no’ to disable it.
> use br0
br0> set stp.enable=yes
Web GUI
The forwarding delay and Spanning Tree Protocol state can be set on the “L2 Bridge” page