RRPP Overview
905
The primary port of the master node transmits the loop detection packet, and the
secondary port of the master node receives the loop detection packet.
When an Ethernet ring is in the healthy state, the secondary port of the master
node allows only RRPP packets to pass, but logically blocks data packets in data
VLANs.
When the Ethernet ring is in the broken state, the secondary port of the master
node stops blocking the data VLAN and begins to forwards data packets in data
VLANs.
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The primary and secondary ports of a transit node are functionally the same.
The node roles are determined by user configuration. As shown in Figure 250,
Switch A is the master node of Ring 1. Port 1 and Port 2 of Switch A are the
primary port and secondary port respectively. Switch B, Switch C and Switch D are
the transit nodes on ring 1, and their respective port 1 and port 2 are the primary
port and secondary port on ring 1.
Subring protocol messages are processed as data packets in the primary ring.
Thus, when the secondary port on the master node of the primary ring, or the
RRPP ports (including the primary and secondary ports) on the transit node are
blocked, both data packets and subring protocol messages cannot pass through
the port. After the ports are unblocked, these packets or messages can pass
through the ports.
Common port and edge port
Of the two ports connecting an edge node (or assistant edge node) to a subring,
one is the common port and the other is the edge port of the node. The common
port connects the edge node to the primary ring and a subring at the same time.
An edge port is connected only with a subring.
Conceptually, a common port is not treated as a port on the subring. Instead, it is
a part of the primary ring. In another word, the common link is a link on the
primary ring instead of the subring. Status change of a public link is only reported
to the master node of the primary ring and the master node of the subring needs
not know about the change.
The node roles are determined by user configuration. As shown in Figure 250,
Switch B and Switch C are on ring 1 and ring 2 at the same time. Port 2 of Switch
B and Port 1 of Switch C connect the primary and a subring, so they are common
ports. Port 3 of Switch B and Port 3 of Switch C connect only the subring, so they
are edge ports.
MAC address FDB
The Layer 2 forwarding database (FDB) on a switch is updated through the source
MAC address auto-learning function of the switch.
Timer
Two timers, Hello timer and Fail timer, are involved when the master node sends
and receives RRPP packets.
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Hello timer: Defines the time interval at which the primary port of the master
node sends the health detection packet.
Summary of Contents for Switch 7754
Page 32: ...32 CHAPTER 1 CLI OVERVIEW ...
Page 70: ...70 CHAPTER 5 LOGGING IN USING MODEM ...
Page 76: ...76 CHAPTER 7 LOGGING IN THROUGH NMS ...
Page 86: ...86 CHAPTER 9 CONFIGURATION FILE MANAGEMENT ...
Page 120: ...120 CHAPTER 13 ISOLATE USER VLAN CONFIGURATION ...
Page 126: ...126 CHAPTER 14 SUPER VLAN ...
Page 136: ...136 CHAPTER 16 IP PERFORMANCE CONFIGURATION ...
Page 152: ...152 CHAPTER 17 IPX CONFIGURATION ...
Page 164: ...164 CHAPTER 19 QINQ CONFIGURATION ...
Page 172: ...172 CHAPTER 21 SHARED VLAN CONFIGURATION ...
Page 182: ...182 CHAPTER 22 PORT BASIC CONFIGURATION ...
Page 198: ...198 CHAPTER 24 PORT ISOLATION CONFIGURATION ...
Page 208: ...208 CHAPTER 25 PORT SECURITY CONFIGURATION ...
Page 224: ...224 CHAPTER 27 DLDP CONFIGURATION ...
Page 232: ...232 CHAPTER 28 MAC ADDRESS TABLE MANAGEMENT ...
Page 240: ...240 CHAPTER 29 CENTRALIZED MAC ADDRESS AUTHENTICATION CONFIGURATION ...
Page 280: ...280 CHAPTER 30 MSTP CONFIGURATION ...
Page 348: ...348 CHAPTER 35 IS IS CONFIGURATION ...
Page 408: ...408 CHAPTER 39 802 1X CONFIGURATION ...
Page 412: ...412 CHAPTER 40 HABP CONFIGURATION ...
Page 422: ...422 CHAPTER 41 MULTICAST OVERVIEW ...
Page 426: ...426 CHAPTER 42 GMRP CONFIGURATION ...
Page 480: ...480 CHAPTER 47 PIM CONFIGURATION ...
Page 506: ...506 CHAPTER 48 MSDP CONFIGURATION ...
Page 552: ...552 CHAPTER 51 TRAFFIC ACCOUNTING CONFIGURATION ...
Page 570: ...570 CHAPTER 53 HA CONFIGURATION ...
Page 582: ...582 CHAPTER 54 ARP CONFIGURATION SwitchA arp protective down recover interval 200 ...
Page 622: ...622 CHAPTER 58 DHCP RELAY AGENT CONFIGURATION ...
Page 684: ...684 CHAPTER 61 QOS CONFIGURATION ...
Page 718: ...718 CHAPTER 63 CLUSTER ...
Page 738: ...738 CHAPTER 67 UDP HELPER CONFIGURATION ...
Page 752: ...752 CHAPTER 69 RMON CONFIGURATION ...
Page 772: ...772 CHAPTER 70 NTP CONFIGURATION ...
Page 796: ...796 CHAPTER 72 FILE SYSTEM MANAGEMENT ...
Page 802: ...802 CHAPTER 73 BIMS CONFIGURATION ...
Page 814: ...814 CHAPTER 74 FTP AND TFTP CONFIGURATION ...
Page 830: ...830 CHAPTER 75 INFORMATION CENTER ...
Page 836: ...836 CHAPTER 76 DNS CONFIGURATION ...
Page 852: ...852 CHAPTER 77 BOOTROM AND HOST SOFTWARE LOADING ...
Page 858: ...858 CHAPTER 78 BASIC SYSTEM CONFIGURATION DEBUGGING ...