Allied Telesis AT-8800, RAPIER I, X900-48FE, AT-8900, AT-8700XL Single Ring, Dual Domain Network

Ethernet Protection Switching Ring (EPSR) 9

Single Ring, Dual Domain Network

This example shows a slightly more complex EPSR configuration where two EPSR domains share the same physical ring. This configuration enables two sets of users to run totally separate layer two networks. Better load distribution around the ring can be achieved by configuring different nodes to be the master for each ring.

Figure 1-5: EPSR Single Ring Network, Two Domain Network.

Port 2

Master Node

Port 1

Secondary

Ring_A

Primary

Ring_A

Ring_A

C

o

n

tr

ol

V

L

Co

A

nt

N

R

r

i

Node 1

ol

n

V

g

LA

_

N

A

Ri

n

g

_

B

Transit Node

D

a

t

a

Port 3

Ring_B

Port 4

D

V

a

L

t

A

a

V

N

L

R

A

N

i

n

R

g

i

_

n

Port 1

g

A

Port 2

Port 4

Port 3

_

B

Transit Node

Transit Node

EPSR Ring

Transit Node 3

Transit Node 1

Ring_A

Ring_B

Ring_B

Ring_A

Node 2

Node 4

Port 2

Port 3

Port 4

Port 1

Port 4

Port 3

Secondary

Primary

Ring_B

Master Node

Ring_B

Ring_B

Node 3

Port 1

Transit Node

Port 2

Ring_A

Control VLAN (control_ring) Ring_A

Control VLAN (control_ring) Ring_B

Date VLAN (data_ring) Ring_A

Date VLAN (data_ring) Ring_B

EPSR 4.eps

Example commands to configure the single ring, dual domain network are shown in Figure 1-6 on page 1-10, Figure 1-7 on page 1-11, and Figure 1-8 on page 1-12.