HP 5300 Informacje Techniczne Pobierz pdf (Strona 262)

Port Traffic Controls

Guaranteed Minimum Bandwidth (GMB)

For example, suppose you wanted to configure the following outbound mini-

mum bandwidth availability for ports A1 and A2:

Priority of

Outbound

Port Queue

Minimum

Bandwidth

Effect on Outbound Bandwidth Allocation

4 50 Queue 4 has the first priority use of all outbound bandwidth not

specifically allocated to queues 1 - 3. If, for example, bandwidth

allocated to queue 1 is not being used and queues 3 and 4 become

oversubscribed, queue 4 has first-priority use of the unused

bandwidth allocated to queue 1.

3 20 Queue 3 has a guaranteed minimum bandwidth of 20% available

for outbound traffic. If queue 3 becomes oversubscribed and

queue 4 is not already using all of the unallocated bandwidth, then

queue 3 can use the unallocated bandwidth. Also, any unused

bandwidth allocated to queues 1 or 2 is available to queue 3 if

queue 4 has not already claimed it.

2 20 Queue 2 has a guaranteed minimum bandwidth of 20% and, if

oversubscribed, is subordinate to queues 4 and 3 in priority for

any unused outbound bandwidth available on the port.

1 10 Queue 1 has a guaranteed minimum bandwidth of 10% and, if

oversubscribed, is subordinate to queues 4, 3, and 2 for any

unused outbound bandwidth available on the port.

Either of the following commands configures ports A1 and A2 with the

bandwidth settings shown in the preceding table:

HPswitch(config)#int a1-a2 bandwidth-min output 10 20 20 50

HPswitch(eth-A1-A2)#bandwidth-min output 10 20 20 50

Displaying the Current Guaranteed Minimum Bandwidth

Configuration

This command displays the per-port GMB configuration in the running-config

file.

Syntax: show bandwidth output [ port-list ]

Without [ port-list ], this command lists the GMB configuration

for all ports on the switch. With [ port-list ], this command lists

the GMB configuration for the specified ports. This command

operates the same way in any CLI context. If the command

lists Disabled for a port, there are no bandwidth minimums

configured for any queue on the port. (Refer to the description

of the no form of the bandwidth-min output command on page

13-18.)

13-20

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