Brocade FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide - Manual (Page 402)

Configuration notes for aggregated VLANs
• This feature is not supported on the 48-port 10/100/1000 Mbps (RJ45) Ethernet POE interface
module (SX-FI48GPP).
• Super Aggregated VLANs and VSRP are not supported together on the same device.
• Super Aggregated VLANs and Q-in-Q are supported using the tag-profile command.
Configuring aggregated VLANs
To configure aggregated VLANs, perform the following tasks:
• On each edge device, configure a separate port-based VLAN for each client connected to the edge
device. In each client VLAN:
‐ Add the port connected to the client as an untagged port.
‐ Add the port connected to the core device (the device that will aggregate the VLANs) as a
tagged port. This port must be tagged because all the client VLANs share the port as an
uplink to the core device.
• On each core device:
‐ Enable VLAN aggregation. This support allows the core device to add an additional tag to
each Ethernet frame that contains a VLAN packet from the edge device. The additional tag
identifies the aggregate VLAN (the path). However, the additional tag can cause the frame
to be longer than the maximum supported frame size. The larger frame support allows
Ethernet frames up to 1530 bytes long.
‐ To allow frames larger than 1522, you must enable jumbo frames. To globally enable
jumbo support , enter commands such as the following.
device(config)# jumbo
device(config)# write memory
device(config)# end
device# reload
NOTE
Enable the VLAN aggregation option only on the core devices.
• Configure a VLAN tag type (tag ID) that is different than the tag type used on the edge devices. If
you use the default tag type (8100) on the edge devices, set the tag type on the core devices to
another value, such as 9100. The tag type must be the same on all the core devices. The edge
devices also must have the same tag type but the type must be different from the tag type on the
core devices.
NOTE
You can enable the Spanning Tree Protocol (STP) on the edge devices or the core devices, but not
both. If you enable STP on the edge devices and the core devices, STP will prevent client traffic from
travelling through the core to the other side.
Configuring aggregated VLANs on an edge device
To configure the aggregated VLANs on device A in Figure 88 on page 401, enter the following
commands.
device(config)# vlan 101 by port
device(config-vlan-101)# tagged ethernet 2/1
device(config-vlan-101)# untagged ethernet 1/1
Configuration notes for aggregated VLANs
402 FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide
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