
C
HAPTER
14
| Basic Administration Protocols
Ethernet Ring Protection Switching
– 507 –
commands, and triggers reversion if the ring is in revertive
behavior mode.
The ring node where the Manual Switch was cleared keeps the
ring port blocked for the traffic channel and for the R-APS
channel, due to the previous Manual Switch command. This ring
port is kept blocked until the RPL is blocked as a result of ring
protection reversion, or until there is another higher priority
request (e.g., an SF condition) in the ring.
The Ethernet Ring Node where the Manual Switch was cleared
continuously transmits the R-APS (NR) message on both ring
ports, informing that no request is present at this ring node. The
ring nodes stop transmitting R-APS (NR) messages when they
accept an RAPS (NR, RB) message, or when another higher
priority request is received.
If the ring node where the Manual Switch was cleared receives
an R-APS (NR) message with a Node ID higher than its own
Node ID, it unblocks any ring port which does not have an SF
condition and stops transmitting R-APS (NR) message on both
ring ports.
■
Recovery with revertive mode is handled as follows:
a.
The RPL Owner Node, upon reception of an R-APS (NR)
message and in the absence of any other higher priority
request, starts the WTB timer and waits for it to expire.
While the WTB timer is running, any latent R-APS (MS)
message is ignored due to the higher priority of the WTB
running signal.
b.
When the WTB timer expires, it generates the WTB
expire signal. The RPL Owner Node, upon reception of
this signal, initiates reversion by blocking the traffic
channel on the RPL, transmitting an R-APS (NR, RB)
message over both ring ports, informing the ring that the
RPL is blocked, and flushes its FDB.
c.
The acceptance of the R-APS (NR, RB) message causes
all ring nodes to unblock any blocked non-RPL that does
not have an SF condition. If it is an R-APS (NR, RB)
message without a DNF indication, all Ethernet Ring
Nodes flush their FDB. This action unblocks the ring port
which was blocked as a result of an operator command.
■
Recovery with non-revertive mode is handled as follows:
a.
The RPL Owner Node, upon reception of an R-APS (NR)
message and in the absence of any other higher priority
request does not perform any action.
b.
Then, after the operator issues the Clear command
(Configure Operation page) at the RPL Owner Node, this
ring node blocks the ring port attached to the RPL,
transmits an R-APS (NR, RB) message over both ring
ports, informing the ring that the RPL is blocked, and
flushes its FDB.
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...