HP E4510-48G, Command Reference Manual

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4-40
Description
Use the stp transmit-limit command to set the maximum transmission rate of the port(s), that is, the
maximum number of BPDUs the port(s) can send within each hello time.
Use the undo stp transmit-limit command to restore the system default.
By default, the maximum transmission rate of all ports of the device is 10, that is, each port can send
up to 10 BPDUs within each hello time.
Note that:
z
Configured in Ethernet interface view, the setting takes effect on the current interface only;
configured in port group view, the setting takes effect on all member ports in the port group.
z
Configured in Layer 2 aggregate interface view, the setting takes effect only on the aggregate
interface; configured on a member port in an aggregation group, the setting can take effect only
after the port leaves the aggregation group.
z
A larger maximum transmission rate value represents more BPDUs that the port will send within
each hello time, but this means that more system resources will be used. An appropriate
maximum transmission rate setting can limit the speed at which a port sends BPDUs and prevent
MSTP from using excessive bandwidth resources during network topology changes. You are
recommended to use the default value.
Examples
# Set the maximum transmission rate of port GigabitEthernet 1/0/1 to 5.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] stp transmit-limit 5
vlan-mapping modulo
Syntax
vlan-mapping modulo modulo
View
MST region view
Default Level
2: System level
Parameters
modulo : Modulo value. The minimum value is 1, and the maximum value is 32.
Description
Use the vlan-mapping modulo command to map VLANs in the current MST region to MSTIs
according to the specified modulo value, thus quickly creating a VLAN-to-instance mapping table.
By default, all VLANs are mapped to the CIST (MSTI 0).
Note that:
z
You cannot map the same VLAN to different MSTIs. If you map a VLAN that has been mapped to
an MSTI to a new MSTI, the old mapping will be automatically removed.