Foundry Networks FESX User Manual

Foundry Configuration Guide for the FESX, FSX, and FWSX
11 - 46 © Foundry Networks, Inc. December 2005
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.
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 11.17 on page 11-45, enter the following commands:
FastIron SuperX Router(config)# vlan 101 by port
FastIron SuperX Router(config-vlan-101)# tagged ethernet 2/1
FastIron SuperX Router(config-vlan-101)# untagged ethernet 1/1
FastIron SuperX Router(config-vlan-101)# exit
FastIron SuperX Router(config)# vlan 102 by port
FastIron SuperX Router(config-vlan-102)# tagged ethernet 2/1
FastIron SuperX Router(config-vlan-102)# untagged ethernet 1/2
FastIron SuperX Router(config-vlan-102)# exit
FastIron SuperX Router(config)# vlan 103 by port
FastIron SuperX Router(config-vlan-103)# tagged ethernet 2/1
FastIron SuperX Router(config-vlan-103)# untagged ethernet 1/3
FastIron SuperX Router(config-vlan-103)# exit
FastIron SuperX Router(config)# vlan 104 by port
FastIron SuperX Router(config-vlan-104)# tagged ethernet 2/1
FastIron SuperX Router(config-vlan-104)# untagged ethernet 1/4
FastIron SuperX Router(config-vlan-104)# exit
FastIron SuperX Router(config)# vlan 105 by port
FastIron SuperX Router(config-vlan-105)# tagged ethernet 2/1
FastIron SuperX Router(config-vlan-105)# untagged ethernet 1/5
FastIron SuperX Router(config-vlan-105)# exit
FastIron SuperX Router(config)# write memory
Syntax: [no] vlan <vlan-id> [by port]
Syntax: [no] tagged ethernet [<slotnum>/]<portnum> [to [<slotnum>/]<portnum> | ethernet [<slotnum>/
]<portnum>]
Syntax: [no] untagged ethernet [<slotnum>/]<portnum> [to [<slotnum>/]<portnum> | ethernet [<slotnum>/
]<portnum>]
Use the tagged command to add the port that the device uses for the uplink to the core device. Use the
untagged command to add the ports connected to the individual clients.
Configuring Aggregated VLANs on a Core Device
To configure the aggregated VLANs on device C in Figure 11.17 on page 11-45, enter the following commands:
FastIron SuperX Router(config)# tag-type 9100
FastIron SuperX Router(config)# aggregated-vlan

Foundry Networks FESX Specifications

General

Brand	Foundry Networks
Model	FESX
Category	Switch
Language	English