389
4.19 Ring
ITU-T G.8032
Ethernet Ring protection switching
(
ERPS
) is a link layer protocol applied on Ethernet loop
protection to provide sub-50ms protection and recovery switching for Ethernet traffic in a ring topology.
ERPS
provides a faster redundant recovery than Spanning Tree topology. The action is similar to STP or RSTP, but
the algorithms between them are not the same. In the Ring topology, every switch should be enabled with Ring
function and two ports should be assigned as the member ports in the ERPS. Only one switch in the Ring group
would be set as the RPL owner switch in which one port, called
owner port
, would be blocked, and PRL neighbour
switch has one port in which one port, called
neighbour port
, would be blocked. The
neighbour port
is connected
to the owner port directly and this link is called
the
Ring Protection Link
or
RPL
. Each switch will send ETH-CCM
message to check the link status in the ring group. When the failure of network connection occurs, the nodes block
the failed link and report the signal failure message. The RPL owner switch will automatically unblock the PRL to
recover from the failure.
Summary of Contents for NS4750-24S-4T-4X
Page 1: ...NS4750 24S 4T 4X User Manual P N 1702826 REV 00 01 ISS 14JUL14 ...
Page 56: ...56 Figure 4 2 7 Privilege Levels Configuration Page Screenshot ...
Page 110: ...110 Figure 4 4 6 Mirror Configuration Page Screenshot ...
Page 117: ...117 Figure 4 5 4 LACP Port Configuration Page Screenshot ...
Page 174: ...174 Figure 4 7 10 MST1 MSTI Port Configuration Page Screenshot ...
Page 180: ...180 Figure 4 8 2 Multicast Flooding ...
Page 249: ...249 Figure 4 9 18 Voice VLAN Configuration Page Screenshot ...
Page 271: ...271 Counter Counts the number of frames that match this ACE ...
Page 281: ...281 Figure 4 11 4 Network Access Server Configuration Page Screenshot ...
Page 315: ...315 ...
Page 328: ...328 ...
Page 335: ...335 ...
Page 346: ...346 Figure 4 14 1 LLDP Configuration Page Screenshot ...
Page 350: ...350 Figure 4 14 2 LLDP MED Configuration Page Screenshot ...
Page 372: ...372 Figure 4 16 1 Loop Protection Configuration Page Screenshot ...