Configuring The Mode A Port Uses To Recognize/Send Mstp Packets - 3Com MSR 50 Series Configuration Manual

468 C 23: MSTP C
HAPTER
n
Configuring the Mode a
Port Uses to
Recognize/Send MSTP
Packets
ONFIGURATION
To do...
Enter Ethernet Enter Ethernet
interface view interface view
or port group
Enter port
view
group view
Configure whether the port(s)
connect to point-to-point links
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 1/0 as connecting to a point-to-point link.
<Sysname> system-view
[Sysname] interface ethernet 1/0
[Sysname-Ethernet1/0] stp point-to-point force-true
A port can send/recognize MSTP packets that are of the following two formats:
802.1s-compliant standard format
■
Compatible format
■
By default, the packet format recognition mode of a port is auto, namely the port
automatically distinguishes the two MSTP packet formats, and determines the
format of packets it will send based on the recognized format. You can configure
the MSTP packet format to be used by a port. After the configuration, when
working in MSTP mode, the port sends and receives only MSTP packets of the
format you have configured to communicate with devices that send the same
format of packets.
Configuration procedure
Follow these steps to configure the mode a port uses to recognize/send MSTP
packets:
To do...
Enter system view
Use the command...
interface interface-type
interface-number
port-group { manual
port-group-name |
aggregation agg-id }
stp point-to-point { auto |
force-false | force-true }
Use the command...
system-view
Remarks
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.
Optional
The default setting is auto;
namely the device
automatically detects
whether an Ethernet port
connects to a point-to-point
link
Remarks
-