Extreme 3804 Guia Do Utilizador
120
Summit24e3 Switch Installation and User Guide
Ethernet Automatic Protection Switching
Figure 21: Gigabit Ethernet fiber EAPS MAN ring
One port of the master node is designated the master node’s primary port (P) to the ring; another port is
designated as the master node’s secondary port (S) to the ring. In normal operation, the master node
blocks the secondary port for all non-control traffic belonging to this EAPS domain, thereby avoiding a
loop in the ring, like STP. Layer 2 switching and learning mechanisms operate per existing standards on
this ring.
designated as the master node’s secondary port (S) to the ring. In normal operation, the master node
blocks the secondary port for all non-control traffic belonging to this EAPS domain, thereby avoiding a
loop in the ring, like STP. Layer 2 switching and learning mechanisms operate per existing standards on
this ring.
NOTE
Like the master node, each transit node is also configured with a primary port and a secondary port on
the ring, but the primary/secondary port distinction is ignored as long as the node is configured as a
transit node.
the ring, but the primary/secondary port distinction is ignored as long as the node is configured as a
transit node.
EW_070
Gigabit Ethernet Fiber
EAPS MAN ring
Master
node
Transit
node
Transit
node
Transit
node
Transit
node