Planet XGS3-24042 User Manual download pdf (Page 618)

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70-4

70.3 Typical Examples of RSPAN

Before RSPAN is invented, network administrators had to connect their PCs directly to the switches, in order

to check the statistics of the network.

However, with the help of RSPAN, the network administrators can configure and supervise the switches

remotely, which brings more efficiency. The figure below shows a sample application of RSPAN.

Figure

70-1 RSPAN Application Sample

Two configuration solutions can be chosen for RSPAN: the first is without reflector port, and the other is with

reflector port. For the first one, only one fixed port can be connected to the intermediate switch. However, no

reflector port has to be configured. This maximizes the usage of witch ports. For the latter one, the port

connected to the intermediate switch is not fixed. Datagrams can be broadcasted in the RSPAN VLAN

through the loopback, which is much more flexible.

The normal mode configuration is show as below:

Solution 1:

Source switch:

Interface ethernet 1/0/1 is the source port for mirroring.

Interface ethernet 1/0/2 is the destination port which is connected to the intermediate switch.

RSPAN VLAN is 5.

Switch(config)#vlan 5

Switch(Config-Vlan5)#remote-span

Switch(Config-Vlan5)#exit

Switch(config)#interface ethernet 1/0/2

Switch(Config-If-Ethernet1/0/2)#switchport mode trunk

Switch(Config-If-Ethernet1/0/2)#exit

Switch(config)#monitor session 1 source interface ethernet1/0/1 rx

Switch(config)#monitor session 1 destination interface ethernet1/0/2

Switch(config)#monitor session 1 remote vlan 5

Source Switch

E10

Intermediate Switch

Destination Switch

PC1

Monitor

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