Extreme Networks ExtremeWare XOS 11.1, Manual

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Multiple EAPS Domains
ExtremeWare XOS 11.1 Concepts Guide
273
Multiple EAPS Domains per Ring—Spatial Reuse
To take advantage of the spatial reuse technology and broaden the use of the ring’s bandwidth, EAPS
supports multiple EAPS domains running on the ring at the same time (
Figure 17 ).
Figure 17: Multiple EAPS domains per ring
So, a single ring might have two EAPS domains running on it. Each EAPS domain would have a
different EAPS master node. Each EAPS domain will protect its own set of protected VLANS.
In a spatial reuse configuration, do not add the same protected VLAN to both EAPS domains.
Multiple EAPS Rings Sharing a Common Link
When you configure EAPS on multiple rings with a common link, you may experience a loop situation
across both rings. To solve this problem you can configure EAPS shared ports.
NOTE
You must have a core or advanced core license to use the EAPS shared port feature.
In the example shown in Figure 16 , switch S5 could be a single point of failure. If switch S5 were to go
down, users on Ring 1 would not be able to communicate with users on Ring 2. To make the network
more resilient, you can add another switch, S10. The link connecting S5 to S10 is knows as the
common
link, as shown in Figure 18 .
EX_100
EAPS 1
EAPS 1
EAPS 2
EAPS 2
Master EAPS 1
Transit EAPS 2
Master EAPS 2
Transit EAPS 1
Transit EAPS 1
Transit EAPS 2 Transit EAPS 1
Transit EAPS 2
S
S