Specifications

192 ExtremeWare XOS 11.0 Concepts Guide
Ethernet Automatic Protection Switching
Configuring EAPS with STP in EMISTP Encapsulation Mode
This section discusses how to configure STP with EMISTP encapsulation in this situation. You use the
EMISTP encapsulation mode when you are running tagged STP Carrier VLAN.
Configuring an STP Carrier VLAN on all switches
To configure an STP Carrier VLAN on all switches, follow these steps when you are using EMISTP
encapsulation mode:
1 Create an STP Carrier VLAN to carry STP BPDUs using the following command:
create vlan <vlan_name> {vr <vr-name>}
2 Tag this STP Carrier VLAN using the following command:
configure vlan <vlan_name> tag <tag>
3 Add the EAPS ring ports to STP Carrier VLAN using the following command:
configure vlan <vlan_name> add ports <port_list> tagged
4 Add the STP Carrier VLAN you created to the EAPS master node as a protected VLAN using the
following command:
configure eaps <name> add protect vlan <vlan_name>
Configuring EAPS VLANs for Switches with STP Enabled
NOTE
EAPS master nodes should be configured only on a switch not running STP; enable STP only on the
common links.
To configure EAPS VLANs for switches running STP, follow these steps when you are using EMISTP
encapsulation mode:
1 Create a Spanning Tree Domain (STPD) using the following command:
create stpd <stpd_name>
2 Configure the STP Forward Delay to 4 seconds using the following command:
configure stpd <stpd_name> forwarddelay 4
3 Configure the STP MaxAge Time to 11 seconds using the following command:
configure stpd <stpd_name> maxage 11
4 Add the STP Carrier VLAN you created to the STPD using the following command:
configure stpd <stpd_name> add vlan <vlan-name> ports all
5 Configure the STP Carrier VLAN's tag on STPD using the following command:
configure stpd <stpd_name> tag <STP Carrier Vlan's Tag Id>
Use the same tag that you earlier assigned to the “STP Carrier” VLAN (see “Configuring an STP
Carrier VLAN on all switches”). This will display as the StpID.