Brocade FastIron Ethernet Switch Platform and Layer 2 Swit Manual de usuario descargar pdf (Pagina 211)

Example 1: Configure the Per-VLAN Spanning Tree on the MCT Clients

External connections between clients other than the links in an MCT cluster can cause Layer 2 loops.

Use Spanning Tree on the MCT clients so that the MCT cluster forwards Spanning Tree Bridge Protocol

Data Units (BPDU) as if the cluster were in a pass-through mode.

Configure per-VLAN Spanning Tree on the two MCT VLANS 1901 and 1905 to have Rapid Spanning

Tree (RSTP/802.1w). This example is based on the network topology shown in Figure 38 on page 209.

Client-1 Configuration

Client-1(config)# vlan 1901 1905

Client-1(config-mvlan-1901*1905)# spanning-tree 802-1w

Client-1(config-mvlan-1901*1905)# end

Client-2 Configuration

Client-2(config)# vlan 1901

Client-2(config-vlan-1901)# spanning-tree 802-1w

Client-2(config-vlan-1901)# spanning-tree 802-1w priority 4095

Client-2(config-vlan-1901)# vlan 1905

Client-2(config-vlan-1901)# spanning-tree 802-1w

Client-2(config-vlan-1901)# end

The MCT cluster switches do not have the spanning tree configured, but the BPDUs are passed

through, and the Spanning Tree on the clients converges.

Use the show 802-1w vlan command to display the RSTP information for the specified port-based

VLAN.

Example 2: Configure Single Spanning Tree (SSTP) on the MCT Clients

In a network where MCT clients have Single 802.1d or Single 802-1w elements of the Spanning Tree

protocol enabled, configure the central processing unit (CPU) of the MCT peer switches so that it

performs BPDU forwarding to avoid Layer 2 loops.

Using SSTP on MCT clients allows you to run a separate spanning tree on each port-based VLAN,

which you can enable or disable on an individual basis. As an alternative, you can run a single spanning

tree across all ports and VLANs on the device.

Enabling BDPU flooding can increase the CPU usage. When BPDU flooding is enabled, do not create

redundant links between the MCT cluster devices or cascade multiple MCT clusters.

To enable the CPU to perform BPDU forwarding, use the bpdu-flood-enable command. This example is

based on the network topology shown in Figure 38 on page 209.

Router-1 configuration

Router-1(config)# bpdu-flood-enable

Warning - Any recieved untagged BPDUs will now be flooded to all the ports.

Router-2 configuration

Router-2(config)# bpdu-flood-enable

Warning - Any recieved untagged BPDUs will now be flooded to all the ports.

Example 1: Configure the Per-VLAN Spanning Tree on the MCT Clients

FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide 211

53-1003086-04

1 2 ... 206 207 208 209 210 211 212 213 214 215 216 ... 453 454

Sin comentarios

Brocade FastIron Ethernet Switch Platform and Layer 2 Swit Manual de usuario Pagina 211