VLAN Translation with STP Redundancy

The example in the following figure configures a VLAN translation network with redundant paths protected by STP.

Parallel paths exist from the member VLAN portion of the network to the translation switch. STP ensures that the main path for this traffic is active and the secondary path is blocked. If a failure occurs in the main path, the secondary paths are enabled.

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STP Redundancy Configuration Example
../Graphics/EX_vlan_0026.svg

The following configuration commands create the member VLANs and enable STP on SW1:

create vlan v101
configure v101 tag 101
configure v101 add ports 1:1 tagged
configure v101 add ports 1:3 tagged
configure v101 add ports 1:4 tagged
create vlan v102
configure v102 tag 102
configure v102 add ports 1:2 tagged
configure v102 add ports 1:3 tagged
configure v102 add ports 1:4 tagged
create vlan v103
configure v103 tag 103
configure v103 add ports 1:3 tagged
configure v103 add ports 1:4 tagged
create vlan v104
configure v104 tag 104
configure v104 add ports 1:3 tagged
configure v104 add ports 1:4 tagged
create stpd stp1
configure stp1 tag 101
configure stp1 add vlan v101
configure stp1 add vlan v102
configure stp1 add vlan v103
configure stp1 add vlan v104
enable stpd stp1

These configuration commands create the member VLANs and enable STP on SW2:

create vlan v103
configure v103 tag 103
configure v103 add ports 1:1 tagged
configure v103 add ports 1:3 tagged
configure v103 add ports 1:4 tagged
create vlan v104
configure v104 tag 104
configure v104 add ports 1:2 tagged
configure v104 add ports 1:3 tagged
configure v104 add ports 1:4 tagged
create vlan v101
configure v101 tag 101
configure v101 add ports 1:3 tagged
configure v101 add ports 1:4 tagged
create vlan v102
configure v102 tag 102
configure v102 add ports 1:3 tagged
configure v102 add ports 1:4 tagged
create stpd stp1
configure stp1 tag 101
configure stp1 add vlan v101
configure stp1 add vlan v102
configure stp1 add vlan v103
configure stp1 add vlan v104
enable stpd stp1

This set of configuration commands creates the member VLANs and enables STP on SW3:

create vlan v101
configure v101 tag 101
configure v101 add ports 1:3 tagged
configure v101 add ports 1:4 tagged
create vlan v102
configure v102 tag 102
configure v102 add ports 1:3 tagged
configure v102 add ports 1:4 tagged
create vlan v103
configure v103 tag 103
configure v103 add ports 1:3 tagged
configure v103 add ports 1:4 tagged
create vlan v104
configure v104 tag 104
configure v104 add ports 1:3 tagged
configure v104 add ports 1:4 tagged
create stpd stp1
configure stp1 tag 101
configure stp1 add vlan v101
configure stp1 add vlan v102
configure stp1 add vlan v103
configure stp1 add vlan v104
enable stpd stp1

The final set of configuration commands creates the translation VLAN and enables VLAN translation on SW3:

create vlan v1000
configure v1000 tag 1000
configure v1000 add ports 2:1 tagged
configure v1000 vlan-translation add member-vlan v101
configure v1000 vlan-translation add member-vlan v102
configure v1000 vlan-translation add member-vlan v103
configure v1000 vlan-translation add member-vlan v104

The following configuration commands create the translation VLAN and enable VLAN translation on VLANs that have overlapping ports:

configure v1000 vlan-translation add member-vlan v102 loopback-port 1:22
configure v1000 vlan-translation add member-vlan v103 loopback-port 1:23
configure v1000 vlan-translation add member-vlan v104 loopback-port 1:24