max bandwidth-affected-linknumber

Function

The max bandwidth-affected-linknumber command sets the upper threshold for the number of interfaces that determine the bandwidth of an Eth-Trunk.

The undo max bandwidth-affected-linknumber command restores the default upper threshold for the number of interfaces that determine the bandwidth of an Eth-Trunk.

By default, the upper threshold for the number of interfaces that determine the bandwidth of an Eth-Trunk is 32 on the S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-HI, S6730-H, S6730S-H, S6730-S, and S6730S-S, 16 on the S5730-SI, S5730S-EI, S6720-LI, S6720S-LI, S6720-SI, and S6720S-SI, and 8 on other models.

Format

max bandwidth-affected-linknumber link-number

undo max bandwidth-affected-linknumber

Parameters

Parameter	Description	Value
link-number	Specifies the upper threshold for the number of interfaces that determine the bandwidth of an Eth-Trunk.	The value is an integer that ranges from 1 to 32 on the S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-HI, S6730-H, S6730S-H, S6730-S, and S6730S-S, 1 to 16 on the S5730-SI, S5730S-EI, S6720-LI, S6720S-LI, S6720-SI, and S6720S-SI, and 1 to 8 on other models. On the S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6730-H, S6730S-H, S6730-S, S6730S-S, S6720-EI, and S6720S-EI, you can run the assign trunk command to set the value, and run the display trunk configuration command to check the configuration.

Parameter

Description

Value

link-number

Specifies the upper threshold for the number of interfaces that determine the bandwidth of an Eth-Trunk.

The value is an integer that ranges from 1 to 32 on the S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-HI, S6730-H, S6730S-H, S6730-S, and S6730S-S, 1 to 16 on the S5730-SI, S5730S-EI, S6720-LI, S6720S-LI, S6720-SI, and S6720S-SI, and 1 to 8 on other models.

On the S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6730-H, S6730S-H, S6730-S, S6730S-S, S6720-EI, and S6720S-EI, you can run the assign trunk command to set the value, and run the display trunk configuration command to check the configuration.

Views

Eth-Trunk interface view

Default Level

2: Configuration level

Usage Guidelines

The upper threshold for the number of interfaces that determine the bandwidth of an Eth-Trunk is used for STP calculation.

For example, device A and device B are connected by two Eth-Trunks. Eth-Trunk1 has three member links that are Up; the Eth-Trunk2 has two member links that are Up. The bandwidth of each member link is 1 Gbit/s, so the bandwidth of Eth-Trunk1 is 3 Gbit/s and the bandwidth of Eth-Trunk2 is 2 Gbit/s. If device A is the root bridge during STP calculation, Eth-Trunk1 on device B is the root port and Eth-Trunk2 is the alternate port. You can run this command to set the upper threshold to 1. Then the bandwidth of Eth-Trunk1 becomes 1 Gbit/s during STP calculation. Bandwidth decrease affects the interface cost, causing STP recalculation. The max bandwidth-affected-linknumber command does not affect traffic forwarding on the Eth-Trunk. The bandwidth used to forward traffic is still 3 Gbit/s.

Example

# Set the upper threshold to 3.

<HUAWEI> system-view
[HUAWEI] interface eth-trunk 1
[HUAWEI-Eth-Trunk1] max bandwidth-affected-linknumber 3