Configure Basic Functions of VLAN Interface

Configuration Condition

No

Configure VLAN Interface

Table 4-2 Configure VLAN interface

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  VLAN interface is one logical interface. To work normally, you need to create the corresponding VLAN and add the physical port to VLAN. For how to create VLAN and add physical port to VLAN, refer to the VLAN chapter of the configuration manual.
• There is no order requirement for creating VLAN interface, creating VLAN and adding physical port to VLAN.

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Configure Interface Logical Bandwidth

The logical bandwidth of the interface affects the calculation of the route cost and QoS, but does not affect the physical bandwidth of the interface. Usually, when the interface is connected to WAN, it is suggested that the logical bandwidth of the user configuration interface is consistent with the actual bandwidth of the leased line.

Table 4-3 Configure interface logical bandwidth

Configure Interface Delay

The interface delay configuration affects the calculation of the routing protocol cost, but does not affect the actual transmission delay of the interface. The user can change the cost of the routing protocol by configuring the interface delay.

Table 4-4 Configure interface delay

Configure Interface MTU

The interface MTU decides the maximum length of the IP fragment packet and the user can configure manually.

Table 4-5 Configure interface MTU

Configure Interface Protocol Delay UP

The UP and DOWN of the interface can be divided into link UP/DOWN and protocol UP/DOWN. When the link is up, the system notifies the upper protocol module through the protocol up to start sending and receiving packets.

In some cases (such as device restarting or board resetting), when the link state of the interface changes from DOWN to UP, the upper protocol module may not be ready to process packets temporarily. In this case, the interface protocol delay UP can be configured, and the interface delays a certain time to notify the protocol UP.

Table 4-6 Configure interface protocol delay UP