3Com Switch 8800 Advanced Software V5 Configuration Guide

162 CHAPTER 14: VLAN CONFIGURATION
categorize VLANs include: IP, IPX, and AppleTalk (AT). The encapsulation formats
include: Ethernet II, 802.3, 802.3/802.2 LLC, and 802.3/802.2 SNAP.
A protocol-based VLAN can be defined by a protocol template, which is
determined by the encapsulation format and protocol type. A port can be
associated to multiple protocol templates. An untagged packet (that is, packet
carrying no VLAN tag) reaching a port associated with a protocol-based VLAN will
be processed as follows.
■ If the packet matches a protocol template, the packet will be tagged with the
VLAN ID of the protocol-based VLAN defined by the protocol template, and
then sent to the specified VLAN.
■ If the packet matches no protocol template, the packet will be tagged with the
default VLAN ID of the port.
A tagged packet (that is, a packet carrying VLAN tags) reaching the port is
processed in the same way as that of port-based VLAN.
■ If the port is configured to permit packets with the VLAN tag, the packet is
forwarded.
■ If the port is configured to deny packets with the VLAN tag, the packet is
dropped.
This feature is mainly used to bind the service type with VLAN for ease of
management and maintenance.
Configuring the
Protocol-Based VLAN
n
This feature is only applicable to the Hybrid port.
Follow the following steps to configure the protocol-based VLAN:
To do... Use the command... Remarks
Enter system view system-view -
Enter VLAN view vlan vlan-id Required
For a nonexistent VLAN,
this command will create a
VLAN and enter its view.
Configure the protocol based VLAN
and specify the protocol template
protocol-vlan [
protocol-index ] { at | ipv4
| ipv6 | ipx { ethernetii |
llc | raw | snap } | mode {
ethernetii etype etype-id
| llc { dsap dsap-id [ ssap
ssap-id ] | ssap ssap-id } |
snap etype etype-id } }
Required
Return to system view quit -