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
E
thernet
R
ing
P
rotection
S
witching (
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.