Ethernet Automatic Protection Switching
Multiple EAPS Domains
This section illustrates how you can work with more than one EAPS domain.
The scenarios described in this section include the following:
EAPS Data VLAN Spanning Two Rings Connected by One Switch on page 400
●
Multiple EAPS Domains per Ring—Spatial Reuse on page 401
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Multiple EAPS Rings Sharing a Common Link on page 402
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EAPS Data VLAN Spanning Two Rings Connected by One Switch
Figure 20
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. Switch S5 has two
instances of EAPS domains running on it: one for each ring.
With this topology, switch S5 must have a core or an advanced core license to run two EAPS domains.
All other participating switches can have an advanced edge license.
Figure 20: EAPS data VLAN spanning two rings interconnected by one switch
S 3
S 2
400
S 4
Ring 1
S 5
P
S
S 1
Master
node
S 6
S 7
Ring 2
S
Master
S 8
node
P
S 9
ExtremeWare XOS 11.3 Concepts Guide
EW_073