iES22GF User’s Manual
36
iS5 Communications Inc.
Label
Description
Enable
Enables fast recovery mode
Port
Ports can be set to 12 priorities. Only the port with the highest priority will
be the active port. 1
st
Priority is the highest.
Save
Click to save the configurations.
5.7
Dual Port Recovery
Dual Port Recovery mode is defined to work with unmanaged devices/switches or ring of switches. This
feature can be set to on single port of switches on both sides of unmanaged ring. The iES22GF with Dual
Port Recovery mode will provide redundant links.
5.7.1 Introduction
Dual Port Recovery is an iS5 Communication Proprietary solution for interoperability issues with unmanaged
devices like unmanaged switches. Dual Port Recovery allows Ethernet switches in ring configuration with
unmanaged devices to recover from failure rapidly to ensure seamless data transmission. A dual port
recovery ring can support up to 5 unmanaged devices and will enable a back-up link in 40ms (adjustable to
min 20ms (recommended is 40ms).
This protocol is based on sending specific messages (BPDU format) from each port on both sides of
unmanaged chain. The Dual Port Recovery feature can be executed with other redundancy protocols on
same device.
