338 Administering ISL Trunking
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 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:
The following example sets the speed for port 3 on slot 2 to two Gbit/sec:
The following example sets the speed for port 3 on slot 2 to autonegotiate:
portcfgspeed
[
slotnumber/
]
portnumber, speed_level
slotnumber
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.
portnumber
Specifies the port number relative to its slot for bladed systems.
speedlevel
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, SAN Switch 4/32 and 4/256 SAN
Director only.)
switch:admin>
portcfgspeed 2/3 2
done.
switch:admin>
switch:admin>
portcfgspeed s/3 0
done.
switch:admin>
Summary of Contents for AE370A - Brocade 4Gb SAN Switch 4/12
Page 18: ...18 ...
Page 82: ...82 Managing user accounts ...
Page 102: ...102 Configuring standard security features ...
Page 126: ...126 Maintaining configurations ...
Page 198: ...198 Routing traffic ...
Page 238: ...238 Using the FC FC routing service ...
Page 260: ...260 Administering FICON fabrics ...
Page 280: ...280 Working with diagnostic features ...
Page 332: ...332 Administering Extended Fabrics ...
Page 414: ...398 Configuring the PID format ...
Page 420: ...404 Configuring interoperability mode ...
Page 426: ...410 Understanding legacy password behaviour ...
Page 442: ...426 ...
Page 444: ......
Page 447: ......