8.9.4 Configuration example of the second VLAN tag adding/removing
Objective:
The gigabitethernet 1/0/1 interface receives Ethernet frames with various VLAN tags. It is necessary to
redirect them to the gigabitethernet 1/0/2 interface, adding the second VLAN-ID 828. When Ethernet frames
with VLAN-ID 828 come on the gigabitethernet 1/0/2, this tag must be removed and sent to the gigabitethernet
1/0/1 interface.
Solution:
Create the bridge without VLAN and IP address on the route.
esr(config)# bridge 1
esr(config-bridge)# enable
esr(config-bridge)# exit
Include the gigabitethernet 1/0/1 interface in bridge 1.
esr(config)# interface gigabitethernet 1/0/1
esr(config-if-gi)# bridge-group 1
esr(config-if-gi)# exit
Include the gigabitethernet 1/0/2.828 sub interface in bridge 1.
esr(config)# interface gigabitethernet 1/0/2.828
esr(config-subif)# bridge-group 1
esr(config-subif)# exit
8.10 Dual-Homing configuration
Dual-Homing is a technology based on redundant links that creates a secure connection in order to prevent
failures of the key network resources.
When adding the second VLAN tag to an Ethernet frame, its size is increased by 4 bytes. MTU must
be increased by 4 bytes or more on the gigabitethernet 1/0/2 router interface and on all equipment
transmitting Q-in-Q frames.
In the current firmware version, this functionality is supported only by ESR-1000 router.
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