QTECH QSW-3400 Инструкция по настройке - Manual (Page 420)

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Switch(config)#monitor session 1 source cpu
Switch(config)#access-list 120 permit tcp 1.2.3.4 0.0.0.255 5.6.7.8
0.0.0.255
Switch(config)#monitor session 1 source interface ethernet 1/15
access-list 120 rx
56.4 Device Mirror Troubleshooting
If problems occur on configuring port mirroring, please check the following first for causes:

Whether the mirror destination port is a member of a TRUNK group or not, if yes,
modify the TRUNK group.

If the throughput of mirror destination port is smaller than the total throughput of mirror
source port(s), the destination port will not be able to duplicate all source port traffic;
please decrease the number of source ports, duplicate traffic for one direction only or
choose a port with greater throughput as the destination port. Mirror destination port
can not be pulled into Isolate vlan, or will affect mirror between VLAN.