Atop Technology EH7510 User manual - Manual (Page 73)

Atop Industrial Managed Ethernet Switch
EH7510
User Manual V 1.0
67
LED Indicators of DIP Switch are as below,
Fig. 2.55
EH7510 is designed with two LEDs on the outer case for indicating current DIP switches’
status; these LEDs are for Ring and Ring Master as shown above (Fig. 2.55). There are
four possible outcomes, and each outcome indicates different ring status; these four
circumstances are addressed below.
Table 2.43
R.M. LED Ring LED R.M. Definition Ring Definition
Light on Light on
There’s a RPL owner.
ERPS enabled. All rings in normal condition.
ERPS enabled.
Off On
No RPL owner.
ERPS disabled. All rings in normal condition.
ERPS enabled.
Off Off
No RPL owner.
ERPS disabled.
ERPS disabled.
Off Blinking
No RPL owner.
ERPS disabled. Ring in protection state.
ERPS enabled.
On Blinking
There’s a RPL owner.
ERPS enabled. Ring in protection state.
ERPS enabled.
2.13.2 ERPS
Ethernet Ring Protection Switching (ERPS) is a protocol for Ethernet layer network rings,
and it specifies protection mechanism. The ring topology provides multipoint connectivity
economically by reducing number of links. ERPS provides highly reliable and stable
protection in the ring topology, and it never forms loops, which can affect network operation.