Alcatel Carrier Internetworking Solutions 6600 manual Configuring Inter-switch Ports for HA VLANs

Configuring High Availability VLANs

Removing MAC Addresses

To remove a MAC address associated with a high availability VLAN, use the no form of the mac- address-tableport-mac vlan mac command. For example, the following command removes MAC address 00:25:9a:5c:2f:10 from VLAN 20:

-> mac-address-table port-mac vlan 20 no mac 00:25:9a:5c:2f:10

To remove more than one MAC address from a high availability VLAN using a single command, enter each address on the same command line separated by a space. For example, to remove MAC addresses 00:25:9a:5c:2f:11, 00:25:9a:5c:12, and 01:00:00:3f:4c:10, from high availability VLAN 30, you would enter:

-> mac-address-table port-mac vlan 30 no mac 00:25:9a:5c:2f:11 00:25:9a:5c:12 01:00:00:3f:4c:10.

Note. Removing the last MAC address from an HA VLAN is not allowed. Deleting the VLAN is required when there is only one MAC address left.

Configuring Inter-switch Ports for HA VLANs

One scenario using HA VLANs involves configuring ingress ports on one switch and egress ports on a second switch. In this case, the ports that connect the two switches require an 802.1Q tag for the HA VLAN.

The vlan 802.1q command is used to tag a port with an HA VLAN. Once this is done, the tagged ports are identified as inter-switch ports and will carry HA VLAN traffic between the two switches. See “Applica- tion Example 2: Inter-Switch HA VLANs” on page 3-17for an example of using inter-switch ports.

Note the following regarding inter-switch ports:

•Fixed ports, 802.1Q tagged ports, and link aggregates on a second-generation module are eligible to become inter-switch ports for HA VLANs.

•Once a link aggregate is tagged with an HA VLAN, it is not possible to add any more member ports to the aggregate.

•The HA VLAN and the default VLAN for an inter-switch port should participate in the same Spanning Tree instance, especially when there are redundant inter-switch connections. If this is not possible— such as when the 1x1 mode is active and there is one instance per VLAN—then ensure that the Span- ning Tree state of the inter-switch port remains the same for both VLANs.

For more information about 802.1Q tagging, see Chapter 10, “Configuring 802.1Q.” For more informa- tion about Spanning Tree modes and instances, see Chapter 6, “Configuring Spanning Tree Parameters,” and Chapter 3, “Using 802.1s Multiple Spanning Tree.”

page 3-14 Release 5.1.6.R02 User Guide Supplement June 2005