User's Manual

Table Of Contents
270
Users Manual of CS-6306R
26.1.2.3 Control VLAN and Data VLAN
A private control VLAN is used between master node and transit node to transmit protocol packets. This
control VLAN is specified by user through configuration and ring's ports are added also by user to the control
VLAN, which guarantees that the protocol packets can be normally forwarded. In general, each port of the
ring network is in the forwarding state in the control VLAN and the ports which do not belong to the ring
network cannot forward the packets of control VLAN.
You can specify different control VLAN for each ring on a switch. The control VLAN
is only used to forward the control packets of the ring network, not for L2/L3
communication. For example, if the VLAN port that corresponds to the control
VLAN is established, the IP address of the VLAN port cannot be pinged through
other devices.
The VLANs except the control VLAN are all data VLANs, which are used to transmit the packets of normal
services or the management packets.
The data VLAN can be used for normal L2/L3 communication. For example, you
can establish a VLAN port corresponding to data VLAN and configure dynamic
routing protocols.
26.1.2.4 Aging of the MAC Address Table
The Ethernet ring protection protocol can transmit data packets to the correct link by controlling the aging of
the switchs MAC address table when the topology changes. In general, the time for a MAC address to age in
the MAC address table is 300 seconds. The ring protection protocol can control the aging of the MAC address
table in a short time.
26.1.2.5 Symbol of a Complete Ring Network
Both the master node and the transit node can show whether the current ring network is complete through the
state symbol “COMPLETE”. On the master node, only when all links of the ring network are normal, the
primary port is in forwarding state and the secondary port is in blocking state can the "COMPLETE” symbol be
real; on the transit node, only when its two transit ports are in forwarding state can the “COMPLETE” symbol
be true.
The state symbol of the ring network helps user to judge the topology state of the current network.