Setting Port Speeds - HP A7533A - Brocade 4Gb SAN Switch Base Administrator's Manual

Setting port speeds

For long-distance ports, if a port is set to autonegotiate port speed, the maximum speed (which is 4
Gbit/sec) is assumed for reserving buffers for the port–this wastes buffers if the port is actually running at 2
Gbit/sec. For long-distance ports, it is best to set the port speed (this applies to SAN Switch 4/32, SAN
Switch 4/32B and 4/256 SAN Director only).
You can set the port speed for one port or for an entire switch. Trunked ports must be set to the
same speed.
To set the speed for one port
1. Connect to the switch and log in as admin.
2. Enter the portCfgSpeed command. The format is:
portcfgspeed [slotnumber/]portnumber, speed_level
slotnumber
portnumber
speedlevel
The following example sets the speed for port 3 on slot 2 to two Gbit/sec:
switch:admin> portcfgspeed 2/3 2
done.
switch:admin>
The following example sets the speed for port 3 on slot 2 to autonegotiate:
switch:admin> portcfgspeed s/3 0
done.
switch:admin>
364 Administering ISL Trunking
For bladed systems only, specify the slot number of the port to be configured,
followed by a slash (/). This operand is only required for switches with slots,
such as the SAN Director 2/128 and 4/256 SAN Director.
Specifies the port number relative to its slot for bladed systems.
Specifies the speed of the link:
• 0—Autonegotiating mode. The port automatically configures for the
highest speed.
• 1—one Gbit/sec mode. Fixes the port at a speed of one Gbit/sec.
Changing the speed to one Gbit/sec causes the port to be excluded from
the trunk group.
• 2—two Gbit/sec mode. Fixes the port at a speed of two Gbit/sec.
• 4—four Gbit/sec mode. Fixes the port at a speed of four Gbit/sec. (4/16
SAN Switch and 4/8 SAN Switch, Brocade 4Gb SAN Switch for HP
p-Class BladeSystem, Brocade 4Gb SAN Switch for HP c-Class
BladeSystem, SAN Switch 4/32, SAN Switch 4/32B and 4/256 SAN
Director only.)