3Com Switch 8800 Advanced Software V5 Configuration Guide

Configuring the Root Bridge 117
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If the maximum transmission rate setting of a port is too big, the port will send a
large number of MSTP packets within each hello time, thus using excessive
network resources. We recommend that you use the default setting.
Configuration example
# Set the maximum transmission rate of port Ethernet 1/1/1 to 5.
<Sysname> system-view
[Sysname] interface ethernet 1/1/1
[Sysname-Ethernet1/1/1] stp transmit-limit 5
Configuring Ports as
Edge Ports
If a port directly connects to a user terminal rather than another device or a shared
LAN segment, this port is regarded as an edge port. When a network topology
change occurs, an edge port will not cause a temporary loop. Therefore, if you
specify a port as an edge port, this port can transition rapidly from the blocked
state to the forwarding state without delay.
Configuration procedure
Following these steps to specify a port or a group of ports as edge port(s):
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■ With BPDU guard disabled, when a port set as an edge port receives a BPDU
from another port, it will become a non-edge port again.
■ If a port directly connects to a user terminal, configure it to be an edge port
and enable BPDU guard for it. This enables the port to transition to the
forwarding state while ensuring network security.
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 the maximum
transmission rate of the port(s)
stp transmit-limit
packet-number
Optional
10 by default
To do... Use the command... Remarks
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 the port(s) as edge
port(s)
stp edged-port enable Required
All Ethernet ports are
non-edge ports by default