R3721-F3210-F3171-HP High-End Firewalls Network Management Configuration Guide-6PW101

91
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter Ethernet interface view or Layer
2 aggregate interface view.
interface interface-type
interface-number
N/A
3. Configure the maximum rate of the
ports.
stp transmit-limit limit 10 by default.
NOTE:
The higher the maximum port rate is, the more BPDUs will be sent within each hello time, and the more
system resources will be used. By setting an appropriate maximum port rate, you can limit the rate at
w
hich the port sends BPDUs and prevent spanning tree protocols from usin
g
excessive network resources
w
hen the network becomes instable. HP recommends you to use the default setting.
Configuring 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 network topology change occurs, an edge port will not cause
a temporary loop. Because a device does not know whether a port is directly connected to a terminal,
you must manually configure the port to be an edge port. After that, this port can transition rapidly from
the blocked state to the forwarding state without delay.
To specify a port or a group of ports as edge port or ports:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter Ethernet interface view or Layer 2
aggregate interface view.
interface interface-type
interface-number
N/A
3. Configure the current ports as edge
ports.
stp edged-port enable
All ports are non-edge ports
by default.
NOTE:
• With BPDU
g
uard disabled, when a port set as an ed
g
e port receives a BPDU from another port, it will
become a non-edge port again. To restore the edge port, re-enable it.
• If a port directly connects to a user terminal, configure it as an edge port and enable BPDU
g
uard for it.
This enables the port to transition to the forwarding state fast while ensuring network security.
• Among loop guard, root guard and edge port settings, only one function (whichever is confi
g
ured the
earliest) can take effect on a port at the same time.
Configuring path costs of ports
Path cost is a parameter related to the rate of a port. On a spanning tree device, a port can have different
path costs in different MSTIs. Setting appropriate path costs allows VLAN traffic flows to be forwarded
along different physical links, achieving VLAN-based load balancing.
The device can automatically calculate the default path cost; alternatively, you can also configure the
path cost for ports.