Dell POWEREDGE M1000E - Manual (Page 428)

428 Monitoring Switch Traffic
Figure 15-25. Add Source Port
5 Click Apply.
6 Repeat the previous steps to add additional source ports.
7 Click Port Mirroring to return to the Port Mirroring page.
8 Enable the administrative mode and specify the destination port.
Figure 15-26. Configure Additional Port Mirroring Settings
9 Click Apply.