Allied Telesis AT 9924SP AT-9924SP-30 AT-9924SP-30 Software Manual page 20

Example 4: EPSR with Nested VLANs
In this example:
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Page 20 | AlliedWare™ OS How To Note: EPSR
client switches A and C are in the same end-user VLAN (vlan20)
client switches B and D are in the same end-user VLAN (vlan200)
traffic for vlan20 and vlan200 is nested inside vlan50 for transmission around the core
vlan50 is the data VLAN for the EPSR domain
vlan100 is the control VLAN for the EPSR domain
Client
Switch
(E)
port 20
port 22
port 1:
primary
port 1
port 22
port 10
Client
Switch
(F)
port 2:
port 2
secondary
Master Transit
Node Node
(A)
EPSR Domain
control VLAN: 100
data VLAN: 50
Transit Transit
Node Node
(B)
port 2
port 2
Example 4: EPSR with Nested VLANs
Client
Switch
(H)
port 10
port 22
port 1
(D)
port 1
(C)
port 22 port 22
port 20
Client
Switch
(G)
epsr-example-nested