H3C S3100 8C SI User Manual

Operation Manual – MSTP
H3C S3100 Series Ethernet Switches Chapter 1 MSTP Configuration
1-15
Connecting to the
common root bridge
Region boundary ports
Port 1
Port 2
Master port Alternate port
Designated port
Port 3 Port 4
Port 5
A
B
C
D
Port 6
Backup port
MST region
Figure 1-5 Port roles
X. Port state
In MSTP, a port can be in one of the following three states:
z Forwarding state. Ports in this state can forward user packets and receive/send
BPDU packets.
z Learning state. Ports in this state can receive/send BPDU packets.
z Discarding state. Ports in this state can only receive BPDU packets.
Port roles and port states are not mutually dependent.
Table 1-6 lists possible
combinations of port states and port roles.
Table 1-6 Combinations of port states and port roles
Port role
Port state
Root/
port/Master
port
Designated
port
Region
boundary
port
Alternate
port
Backup
port
Forwarding √ √ √ — —
Learning √ √ √ — —
Discarding √ √ √ √ √

H3C S3100 8C SI Specifications

General

Brand	H3C
Model	S3100 8C SI
Category	Switch
Language	English