Extreme Networks ExtremeWare XOS 11.3, Manual

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Ethernet Automatic Protection Switching
ExtremeWare XOS 11.3 Concepts Guide
402
Figure 22: EAPS shared ports configuration with spatial reuse
For information about configuring common links and EAPS shared ports, see “Configuring EAPS
Shared Ports” on page 411 .
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 an advanced core license to use the EAPS shared port feature.
In the example shown in Figure 20 , 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 23 .
EX_105