Extreme Networks ExtremeWare XOS 11.1, Manual

Page: 272 / 496

Ethernet Automatic Protection Switching
ExtremeWare XOS 11.1 Concepts Guide
272
Multiple EAPS Domains
This section illustrates how you can work with more than one EAPS domain.
EAPS Data VLAN Spanning Two Rings Connected by One Switch
Figure 16 shows how a data VLAN could span two rings interconnected by a common switch—a
“figure eight” topology. In this example, there is an EAPS domain with its own control VLAN running
on ring 1 and another EAPS domain with its own control VLAN running on ring 2. A data VLAN that
spans both rings will be added as a protected VLAN to both EAPS domains. In
Figure 16 , switch S5 will
have two instances of EAPS domains running on it: one for each ring.
Figure 16: EAPS data VLAN spanning two rings interconnected by one switch
EW_073
Master
node
Master
node
S 4
S 5
S 3
S 2
S 1
S
S
P
P
S 6
S 7
S 9
S 8
Ring 1 Ring 2