Allied Telesis AlliedWare Plus Operating System Version 5.4.4C (x310-26FT,x310-26FP,x310-50FT,x310-50FP) - Manual (Page 1488)

EPSR Introduction and Configuration
Software Reference for x310 Series Switches
57.6 AlliedWare Plus TM Operating System - Version 5.4.4C C613-50046-01 REV A
Managing Rings with Two Breaks
To restore a link with two breaks you need to run the EPSR Enhanced Recovery feature.
Consider the network shown below:
Figure 57-3: EPSR Ring with Two Breaks
In this situation the ring will attempt to recover as previously described in “Fault
Recovery” on page 57.4 . This will result in the split-ring operation shown in Figure 57-4
on page 57.7 .
Master
Node
Transit
Node
A
Transit
Node
E
Transit
Node
B
Transit
Node
C
Master Node Hello Message Control VLAN
Transit
Node
D
EPSR Plus.eps
(1)
P S