Manual

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327
{interface <interface-list>} {rx| tx| both}
no monitor session <session> source
{interface <interface-list>}
deletes mirror source port.
3. Specify flow mirror source
Command
Explanation
Global mode
monitor session <session> source {interface
<interface-list>} access-group <num> {rx|tx|both}
no monitor session <session> source {interface
<interface-list>} access-group <num>
Specifies flow mirror source port
and apply rule; the no command
deletes flow mirror source port.
36.3 Mirror Examples
Example:
The requirement of the configurations is shown as below: to monitor at interface 1 the data
frames sent out by interface 9 and received from interface 7, and the data frames received by
interface 15 and matched by rule 120(The source IP address is 1.2.3.4 and the destination IP
address is 5.6.7.8).
Configuration guidelines:
1. Configure interface 1 to be a mirror destination interface.
2. Configure the interface 7 ingress and interface 9 egress to be mirrored source.
3. Configure access list 120.
4. Configure access 120 to binding interface 15 ingress.
Configuration procedure is as follows:
Switch(config)#monitor session 4 destination interface ethernet 1/0/1
Switch(config)#monitor session 4 source interface ethernet 1/0/7 rx
Switch(config)#monitor session 4 source interface ethernet 1/0/9 tx
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 4 source interface ethernet 1/0/15 access-list 120 rx
36.4 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.