3Com WX3000 Associating a Port with a Protocol-Based Vlan, Port hybrid protocol-vlan

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Because the IP protocol is closely associated with the ARP protocol, you are recommended to configure the ARP protocol type when configuring the IP protocol type and associate the two protocol types with the same port to avoid that ARP packets and IP packets are not assigned to the same VLAN, which will cause IP address resolution failure.

If you specify some special values for both the dsap-idand ssap-idarguments when configuring the user-defined template for IIc encapsulation, the matching packets will take the same encapsulation format as some standard type of packets. For example, when both dsap-idand ssap-idhave a value of 0xFF, the encapsulation format will be the same as that of ipx raw packets; if they both have a value of 0xE0, the packet encapsulation format will be the same as that of ipx llc packets; if they both have a value of 0xAA, the packet encapsulation format will be the same as that of snap packets. To prevent two commands from processing packets of the same protocol type in different ways, the system does not allow you to set both the dsap-idand ssap-idarguments to 0xFF, 0xE0, or 0xAA.

When you use the mode keyword to configure a user-defined protocol template, if you set the etype-idargument for ethernetii or snap packets to 0x0800, 0x809B, or 0x8137, the matching packets will take the same format as that of the IP, IPX, and AppleTalk packets respectively. To prevent two commands from processing packets of the same protocol type in different ways, the switch will prompt that you cannot set the etype-idargument for Ethernet II or snap packets to 0x0800, 0x089B, or 0x8137.

Associating a Port with a Protocol-Based VLAN

Configuration prerequisites

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The protocol template for the protocol-based VLAN is configured.

The port is configured as a hybrid port, and the port is configured to remove VLAN tags when it forwards the packets of the protocol-based VLANs.

Configuration procedure

Follow these steps to associate a port with the protocol-based VLAN:

To do…	Use the command…	Remarks
Enter system view	system-view	—
Enter port view	interface interface-type	—
	interface-number
	port hybrid protocol-vlan	Required
Associate the port with the		By default, a port is not
	vlan vlan-id { protocol-index
specified protocol-based VLAN		associated with any
	[ to protocol-index-end ] all }
		protocol-based VLAN.

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