3Com Switch 8800 Advanced Software V5 Configuration Guide

118 CHAPTER 11: MSTP CONFIGURATION
Configuration example
# Configure Ethernet 1/1/1 to be an edge port.
<Sysname> system-view
[Sysname] interface ethernet 1/1/1
[Sysname-Ethernet1/1/1] stp edged-port enable
Configuring Whether
Ports Connect to
Point-to-Point Links
A point-to-point link is a link directly connecting with two devices. If the roles of
two ports directly connected by a point-to-point link meet specific requirements,
the ports can rapidly transition to the forwarding state after a proposal-agreement
handshake process.
Configuration procedure
Following these steps to configure whether a port or a group of ports connect to
point-to-point links:
n
■ As for aggregated ports, all ports can be configured as connecting to
point-to-point links. If a port works in auto-negotiation mode and the
negotiation result is full duplex, this port can be configured as connecting to a
point-to-point link.
■ If a port is configured as connecting to a point-to-point link, the setting takes
effect for the port in all MST instances. If the physical link to which the port
connects is not a point-to-point link and you force it to be a point-to-point link
by configuration, the configuration may incur a temporary loop.
Configuration example
# Configure port Ethernet 1/1/1 as connecting to a point-to-point link.
<Sysname> system-view
[Sysname] interface ethernet 1/1/1
[Sysname-Ethernet1/1/1] stp point-to-point force-true
Configuring the MSTP
Packet Format for Ports
A port support two types of MSTP packets:
■ 802.1s-compliant standard format
■ Compatible format
To do... Use the command... Remarks
Enter system view system-view -
Enter Ethernet
interface view
or port group
view
Enter Ethernet
interface view
interface interface-type
interface-number
User either command
Configured in Ethernet
interface view, the setting is
effective on the current port
only; configured in port
group view, the setting is
effective on all ports in the
port group
Enter port
group view
port-group { manual
port-group-name |
aggregation agg-id }
Configure whether the port(s)
connect to point-to-point links
stp point-to-point {
force-true | force-false |
auto }
Optional
The default setting is auto;
namely the device
automatically detects
whether an Ethernet port
connects to a point-to-point
link