Manual
+7(495) 797-3311 www.qtech.ru 
Москва, Новозаводская ул., 18, стр. 1 
430 
Switch(config)#vlan 5 
Switch(Config-Vlan5)#remote-span 
Switch(Config-Vlan5)#exit 
Switch(config)#interface ethernet 1/6-7 
Switch(Config-If-Port-Range)#switchport mode trunk 
Switch(Config-If-Port-Range)#exit 
Destination switch: 
Interface ethernet1/9 is the source port which is connected to the source switch. 
Interface ethernet1/10 is the destination port which is connected to the monitor. This port is 
required to be configured as an access port, and belong to the RSPAN VLAN. 
RSPAN VLAN is 5. 
Switch(config)#vlan 5 
Switch(Config-Vlan5)#remote-span 
Switch(Config-Vlan5)#exit 
Switch(config)#interface ethernet 1/9 
Switch(Config-If-Ethernet1/9)#switchport mode trunk 
Switch(Config-If-Ethernet1/9)#exit 
Switch(config)#interface ethernet 1/10 
Switch(Config-If-Ethernet1/10)#switchport access vlan 5 
Switch(Config-If-Ethernet1/10)#exit 
58.4 RSPAN Troubleshooting 
Due to the following reasons, RSPAN may not function: 
   Whether  the  destination  mirror  port  is  a  member  of  the  Port-channel  group.  If  so, 
please change the Port-channel group configuration; 
   The  throughput  the  destination  port  is  less  than  the  total  throughput  of  the  source 
mirror ports. If so, the destination cannot catch all the datagrams from every source 
ports. To solve the problem, please reduce the number of the source ports, or mirror 
only single direction data flow, or choose some other port with higher capacity as the 
destination port. 
   Between the source switch and the intermediate switch, whether the native VLAN of 
the TRUNK ports is configured as RSPAN VLAN. If so, please change the native VLAN 
for the TRUNK ports. 










