KBC Networks ESML6-P3 - Manual (Page 27)

Ethernet Switch User Manual
Manual_web_mgt_sw-ESML6-P3-Rev 1107
Copyright © KBC Networks Ltd. 2011 Page 26 of 51 www.kbcnetworks.com
S1 S2
RSTP domain
A
C
D
B
DT-ring domain
Fig 3-34 RSTP Transparent Transmission Example
Fig 3-35 Transparent Transmission
3.1.3.11 DT-Ring
The DT-Ring family is a set of proprietary protocols that are available on the ESML6-P3
switch. They are customized for industrial needs and provide reliable communication and
fast recovery from link and device failures. DT-Ring is used in a single ring topology to
provide redundancy protection and DT-Ring+ is used to provide backup between two DT-
Rings, collectively they are known as DT-PORT protocols.
DT-Ring uses the ring and port status to ensure a redundant ring without creating a loop.
It can only be used with other KBC switches with DT-Ring enabled. If two networks are to
be connected where one is using DT-Ring and the other RSTP, then RSTP Transparent
Transmission must be used, see section 10 above for details.