162CHAPTER 7: QOS/ OPERATION

Perform the following two configuration tasks in system view.

Setting Port Mirroring

Port mirroring means duplicating data on the monitored port to the designated monitor port, for purpose of data analysis and supervision. The switch supports many-to-one mirroring, that is, you can duplicate packets from multiple ports to a monitoring port.

You can also specify the monitoring direction for only inbound or outbound packets.

Perform the following configurations in system view.

Table 170 Setting Port Mirroring

Operation

Command

 

 

Set port mirroring

mirroring-group groupid { inbound

 

outbound } mirroring-port-list &<1-8>

 

mirrored-to monitor-port

 

 

Remove port mirroring

undo mirroring-group groupid

 

 

You can configure up to 20 mirroring groups, Each group includes one monitoring port and multiple monitored ports.

The monitoring port and the monitored ports must be on the same interface unit.

For a non-48-port interface unit, only one mirroring group can be configured in one direction. For example, you can only configure one mirroring group for the inbound packets on one interface unit. Failure will be prompted if you configure a second. The same restriction applies to outbound packets.

For a 48-port interface unit, the monitoring port and the monitored port must all be at the ports 1~24 or the ports 25~48, at which only one mirroring group can be configured in one direction.

Setting Queue Scheduling

Queue scheduling is often used in solving the problem of resource contention during network congestion.

Each port supports eight outbound queues. The switch only supports SP algorithm, but you can distribute packets into the target queues according to several types of priority. The following tables show the mapping between outbound queues and priority schemes.

Table 171 Mapping Between 802.1p Priority Levels and Outbound Queues

802.1p priority level

Queues

 

 

2

0

 

 

0

1

 

 

1

2

 

 

3

3

 

 

4

4

 

 

5

5

6

6

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3Com 10014298 manual Setting Port Mirroring, Setting Queue Scheduling