SNR S2940-8G-v2 Switch Configuration Guide
Selective QinQ Configuration
switch(config-if-ethernet1/1)#dot1q-tunnel selective enable
# Configure Ethernet 1/2 as a hybrid port and configure it to remove
# VLAN tags when forwarding packets of VLAN 2000.
switch(config-if-ethernet1/2)#switchport mode hybrid
switch(config-if-ethernet1/2)#switchport hybrid allowed vlan 2000 untag
# Configure mapping rules for selective QinQ on Ehernet1/2 to insert
# VLAN 2000 tag as the outer VLAN tag in packets with the tags of
# VLAN 201 through VLAN 300.
switch(config-if-ethernet1/2)#dot1q-tunnel selective s-vlan 2000 c-vlan 201-300
# Enable selective QinQ on Ethernet 1/2.
switch(config-if-ethernet1/2)#dot1q-tunnel selective enable
# Configure uplink port Ethernet 1/9 as a hybrid port and configure it
# to save VLAN tags when forwarding packets of VLAN 1000 and VLAN 2000.
switch(config-if-ethernet1/2)#interface ethernet 1/9
switch(config-if-ethernet1/9)#switchport mode hybrid
switch(config-if-ethernet1/9)#switchport hybrid allowed vlan 1000;2000 tag
After the above configuration, packets of VLAN 100 through VLAN 200 from Ethernet1/1 are
automatically tagged with the tag of VLAN 1000 as the outer VLAN tag, and packets of VLAN 201
through VLAN 300 from Ethernet1/2 are automatically tagged with the tag of VLAN 2000 as the
outer VLAN tag on SwitchA.
The configuration on Switch B is similar to that on Switch A, the configuration is as follows:
switch(config)#vlan 1000;2000
switch(config)#interface ethernet 1/1
switch(config-if-ethernet1/1)#switchport mode hybrid
switch(config-if-ethernet1/1)#switchport hybrid allowed vlan 1000 untag
switch(config-if-ethernet1/1)#dot1q-tunnel selective s-vlan 1000 c-vlan 100-200
switch(config-if-ethernet1/1)#dot1q-tunnel selective enable
switch(config-if-ethernet1/1)#interface ethernet 1/2
switch(config-if-ethernet1/2)#switchport hybrid allowed vlan 2000 untag
switch(config-if-ethernet1/2)#dot1q-tunnel selective s-vlan 2000 c-vlan 201-300
switch(config-if-ethernet1/2)#dot1q-tunnel selective enable
switch(config-if-ethernet1/9)#switchport mode hybrid
switch(config-if-ethernet1/9)#switchport hybrid allowed vlan 1000;2000 tag
18.4 Selective QinQ Troubleshooting
• Selective QinQ and dot1q-tunnel functions should not be configured synchronously for a port.
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