Brocade FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide - Manual (Page 270)

Configuring a Fast Uplink Port Group
To configure a group of ports for Fast Uplink Span, enter the following commands:
device(config)# fast uplink-span ethernet 4/1 to 4/4
device(config)# write memory
Syntax: [no] fast uplink-span [ ethernet port [ethernet port...| to port]]
This example configures four ports, 4/1 - 4/4, as a Fast Uplink Span group. In this example, all four
ports are connected to a wiring closet switch. Only one of the links is expected to be active at any
time. The other links are redundant. For example, if the link on port 4/1 is the active link on the wiring
closet switch but becomes unavailable, one of the other links takes over. Because the ports are
configured in a Fast Uplink Span group, the STP convergence takes one second instead of taking at
least 30 seconds using the standard STP forward delay.
You can add ports to a Fast Uplink Span group by entering the fast uplink-span command additional
times with additional ports. The device can have only one Fast Uplink Span group, so all the ports you
identify as Fast Uplink Span ports are members of the same group.
To remove a Fast Uplink Span group or to remove individual ports from a group, use "no" in front of
the appropriate fast uplink-span command. For example, to remove ports 4/3 and 4/4 from the Fast
Uplink Span group configured above, enter the following commands:
device(config)# no fast uplink-span ethernet 4/3 to 4/4
device(config)# write memory
To check the status of ports with Fast Uplink Span enabled.
device(config)# show span fast-uplink-span
STP instance owned by VLAN 1
Global STP (IEEE 802.1D) Parameters:
VLAN Root Root Root Prio Max He- Ho- Fwd Last Chg Bridge
ID ID Cost Port rity Age llo ld dly Chang cnt Address
Hex sec sec sec sec sec
1 000000c100000001 2 1/3/1 8000 20 2 1 15 65 15 000011111111
Port STP Parameters:
Port Prio Path State Fwd Design Designated Designated
Num rity Cost Trans Cost Root Bridge
Hex
1/1/2 80 0 DISABLED 0 0 0000000000000000 0000000000000000
1/1/3 80 0 DISABLED 0 0 0000000000000000 0000000000000000
1/1/4 80 4 FORWARDING 1 2 000000c100000001 8000000011111111
1/1/5 80 0 DISABLED 0 0 0000000000000000 0000000000000000
1/1/6 80 0 DISABLED 0 0 0000000000000000 0000000000000000
1/1/7 80 0 DISABLED 0 0 0000000000000000 0000000000000000
1/1/8 80 0 DISABLED 0 0 0000000000000000 0000000000000000
1/1/9 80 0 DISABLED 0 0 0000000000000000 0000000000000000
Syntax: show span fast-uplink-span
Configuring Fast Uplink Span within a VLAN
You can also configure Fast Uplink Span on the interfaces within a VLAN.
To configure Fast Uplink Span for a VLAN, enter command such as the following.
device(config)#vlan 10
device(config-vlan-10)#untag ethernet 8/1 to 8/2
device(config-vlan-10)#fast uplink-span ethernet 8/1 to 8/2
Syntax:[no] fast uplink-span ethernet port-no
To check the status of Fast Uplink Span for a specified VLAN.
device(config-vlan-2)#show span vlan 2 fast-uplink-span
Configuring a Fast Uplink Port Group
270 FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide
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