Brocade Multi-Service IronWare Switching Configuration Guide (Supporting R05.6.00) - Manual (Page 379)

Multi-Service IronWare Switching Configuration Guide 349
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STP feature configuration
12
• FSX 800 and FSX 1600 chassis devices – slotnum/portnum
• ICX devices – slotnum/portnum
• FESX compact switches – portnum
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 atleast 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:
Brocade(config)# no fast uplink-span ethernet 4/3 to 4/4
Brocade(config)# write memory
To check the status of ports with Fast Uplink Span enabled.
Brocade(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.
Brocade(config)#vlan 10
Brocade(config-vlan-10)#untag ethernet 8/1 to 8/2