Allied Telesis AT-S63 - Manual (Page 193)

AT-S63 Management Software Features Guide
Section III: Snooping Protocols 193
Guidelines
The guidelines to EPSR snooping are:
ˆ The AT-9400 Switch can support up to sixteen control VLANs and so
up to sixteen EPSR instances.
ˆ The AT-9400 Switch can not be the master node of a ring.
ˆ EPSR snooping does not support the transit node unsolicited method
of fault notification.
ˆ The switch must be operating in the user-configure VLAN mode to
support the feature. EPSR snooping is not supported in the Multiple
VLAN mode or the 802.1Q-compliant Multiple VLAN mode.
ˆ The control VLAN must have exactly two ports. The only exception to
this rule is if the ports of the control VLAN are part of a static port trunk.
The ports, which must be tagged members of the VLAN, are used as
the ring’s ports of the EPSR instance.
ˆ The ports of the control VLAN and the data VLANs of an EPSR
instance cannot be running LACP, STP, or GARP.
ˆ The control VLAN cannot be part of another EPSR instance as either a
control or data VLAN.
ˆ EPSR snooping is only compatible with the EPSR feature on Allied
Telesis products.