Vlan-Mapping Modulo - H3C S7500E Series Command Reference Manual

By default, the maximum transmission rate of all ports of the device is 10, in other words, each port can
send up to 10 BPDUs within each hello time.
Configured in Layer 2 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.
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.
A larger maximum transmission rate value requires more system resources. 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. H3C recommends that you
use the default value.
Examples
# Set the maximum transmission rate of port GigabitEthernet 2/0/1 to 5.
<Sysname> system-view
[Sysname] interface gigabitethernet 2/0/1
[Sysname-GigabitEthernet2/0/1] 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 31.
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).
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.
This command maps each VLAN to the MSTI whose ID is (VLAN ID - 1) %modulo + 1, where (VLAN
ID - 1) %modulo is the modulo operation for (VLAN ID - 1). If the modulo value is 15, for example, then
VLAN 1 will be mapped to MSTI 1, VLAN 2 to MSTI 2, VLAN 15 to MSTI 15, VLAN 16 to MSTI 1, and
so on.
Related commands: region-name, revision-level, display stp region-configuration, check
region-configuration, and active region-configuration.
Examples
# Map VLANs to MSTIs as per modulo 8.
<Sysname> system-view
11-42