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Chapter 36: VLAN Commands
Configuring IEEE 802.1Q Tunneling
switchport
dot1q-tunnel tpid
Console(config)#dot1q-tunnel system-tunnel-control
Configure port 2 as a tagged member of VLANs 100, 200 and 300 using
3.
uplink mode.
Console(config)#interface ethernet 1/2
Console(config-if)#switchport allowed vlan add 100,200,300 tagged
Console(config-if)#switchport dot1q-tunnel mode uplink
Configures port 1 as an untagged member of VLANs 100, 200 and 300
4.
using access mode.
Console(config)#interface ethernet 1/1
Console(config-if)#switchport allowed vlan add 100,200,300 untagged
Console(config-if)#switchport dot1q-tunnel mode access
Configure the following selective QinQ mapping entries.
5.
Console(config)#interface ethernet 1/1
Console(config-if)#switchport dot1q-tunnel service 100 match cvid 10
Console(config-if)#switchport dot1q-tunnel service 200 match cvid 20
Console(config-if)#switchport dot1q-tunnel service 300 match cvid 30
Configures port 1 as member of VLANs 10, 20 and 30 to avoid filtering
6.
out incoming frames tagged with VID 10, 20 or 30 on port 1
Console(config)#interface ethernet 1/1
Console(config-if)#switchport allowed vlan add 10,20,30
Verify configuration settings.
7.
Console#show dot1q-tunnel service
802.1Q Tunnel Service Subscriptions
Port
Match C-VID S-VID
-------- ----------- -----
Eth 1/ 1
10
Eth 1/ 1
20
Eth 1/ 1
30
Step 2. Configure Switch C.
Create VLAN 100, 200 and 300.
1.
Console(config)#vlan database
Console(config-vlan)#vlan 100,200,300 media ethernet state active
Configure port 1 and port 2 as tagged members of VLAN 100, 200 and
2.
300.
Console(config)#interface ethernet 1/1,2
Console(config-if)#switchport allowed vlan add 100,200,300 tagged
This command sets the Tag Protocol Identifier (TPID) value of a tunnel
port. Use the no form to restore the default setting.
S
YNTAX
switchport dot1q-tunnel tpid tpid
no switchport dot1q-tunnel tpid
tpid – Sets the ethertype value for 802.1Q encapsulation. This
identifier is used to select a nonstandard 2-byte ethertype to
– 1098 –
100
200
300
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