
C
HAPTER
14
| Basic Administration Protocols
Ethernet Ring Protection Switching
– 516 –
ERPS F
ORCED
AND
M
ANUAL
M
ODE
O
PERATIONS
Use the Administration > ERPS (Configure Operation) page to block a ring
port using Forced Switch or Manual Switch commands.
CLI R
EFERENCES
◆
"erps forced-switch" on page 1141
◆
"erps manual-switch" on page 1143
◆
P
ARAMETERS
These parameters are displayed:
◆
Domain Name
– Name of a configured ERPS ring.
◆
Operation
– Specifies a Forced Switch (FS) or Manual Switch (MS)
operation on the east or west ring port.
■
Forced Switch
– Blocks specified ring port. (Options: West or East)
■
A ring with no pending request has a logical topology with the
traffic channel blocked at the RPL and unblocked on all other
ring links. In this situation, the FS command triggers protection
switching as follows:
a.
The ring node where an FS command was issued blocks the
traffic channel and R-APS channel on the ring port to which
the command was issued, and unblocks the other ring port.
b.
The ring node where the FS command was issued transmits
R-APS messages indicating FS over both ring ports. R-APS
(FS) messages are continuously transmitted by this ring
node while the local FS command is the ring node’s highest
priority command (see
). The R-APS
(FS) message informs other ring nodes of the FS command
and that the traffic channel is blocked on one ring port.
c.
A ring node accepting an R-APS (FS) message, without any
local higher priority requests unblocks any blocked ring port.
This action subsequently unblocks the traffic channel over
the RPL.
d.
The ring node accepting an R-APS (FS) message, without
any local higher priority requests stops transmission of R-
APS messages.
e.
The ring node receiving an R-APS (FS) message flushes its
FDB.
■
Protection switching on a forced switch request is completed
when the above actions are performed by each ring node. At
this point, traffic flows around the ring are resumed. From this
point on the following rules apply regarding processing of
further forced switch commands:
■
While an existing forced switch request is present in a ring,
any new forced switch request is accepted, except on a ring
node having a prior local forced switch request. The ring
Содержание ECS4110-28T
Страница 1: ...Management Guide www edge core com ECS4110 28T 28P 52T 52P 28 52 Port Gigabit Ethernet Layer 2 Switch...
Страница 2: ......
Страница 4: ......
Страница 63: ...FIGURES 63 Figure 428 Configuring VLAN Translation 1177...
Страница 64: ...FIGURES 64...
Страница 72: ...TABLES 72...
Страница 74: ...SECTION I Getting Started 74...
Страница 102: ...SECTION II Web Configuration 102 General IP Routing on page 679...
Страница 154: ...CHAPTER 4 Basic Management Tasks Resetting the System 154...
Страница 198: ...CHAPTER 5 Interface Configuration VLAN Trunking 198 Figure 65 Configuring VLAN Trunking...
Страница 272: ...CHAPTER 9 Congestion Control Automatic Traffic Control 272...
Страница 286: ...CHAPTER 10 Class of Service Layer 3 4 Priority Settings 286...
Страница 420: ...CHAPTER 13 Security Measures DHCP Snooping 420...
Страница 566: ...CHAPTER 14 Basic Administration Protocols OAM Configuration 566...
Страница 638: ...CHAPTER 15 Multicast Filtering Multicast VLAN Registration for IPv6 638...
Страница 662: ...CHAPTER 16 IP Configuration Setting the Switch s IP Address IP Version 6 662...
Страница 678: ...CHAPTER 17 IP Services Configuring the PPPoE Intermediate Agent 678...
Страница 792: ...CHAPTER 21 System Management Commands Switch Clustering 792...
Страница 822: ...CHAPTER 23 Remote Monitoring Commands 822...
Страница 888: ...CHAPTER 24 Authentication Commands PPPoE Intermediate Agent 888...
Страница 968: ...CHAPTER 25 General Security Measures Port based Traffic Segmentation 968...
Страница 994: ...CHAPTER 26 Access Control Lists ACL Information 994...
Страница 1034: ...CHAPTER 28 Link Aggregation Commands Trunk Status Display Commands 1034...
Страница 1044: ...CHAPTER 29 Power over Ethernet Commands 1044...
Страница 1084: ...CHAPTER 33 UniDirectional Link Detection Commands 1084...
Страница 1090: ...CHAPTER 34 Address Table Commands 1090...
Страница 1194: ...CHAPTER 37 VLAN Commands Configuring Voice VLANs 1194...
Страница 1388: ...CHAPTER 42 CFM Commands Delay Measure Operations 1388...
Страница 1410: ...CHAPTER 44 Domain Name Service Commands 1410...
Страница 1420: ...CHAPTER 45 DHCP Commands DHCP Relay 1420...
Страница 1472: ...CHAPTER 46 IP Routing Commands IPv4 Commands 1472...
Страница 1474: ...SECTION IV Appendices 1474...
Страница 1502: ...COMMAND LIST 1502...
Страница 1513: ......
Страница 1514: ...ECS4110 28T ECS4110 28P ECS4110 52T ECS4110 52P E072014 ST R02 150200000929A...