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User’s Manual of SGSD-1022 / SGSD-1022P
SGSW-2840 / SGSW-2840P
586
5.21.7 Configuring Protocol-based VLANs
The network devices required to support multiple protocols cannot be easily grouped into a common VLAN. This may require
non-standard devices to pass traffic between different VLANs in order to encompass all the devices participating in a specific
protocol. This kind of configuration deprives users of the basic benefits of VLANs, including security and easy accessibility.
To avoid these problems, you can configure this switch with protocol-based VLANs that divide the physical network into logical
VLAN groups for each required protocol. When a frame is received at a port, its VLAN membership can then be determined
based on the protocol type in use by the inbound packets.
Command Function Mode
protocol-vlan protocol-group Create a protocol group, specifying the supported protocols GC
protocol-vlan protocol-group Maps a protocol group to a VLAN IC
show protocol-vlan
protocol-group
Shows the configuration of protocol groups PE
show interfaces protocol-group Shows the mapping of protocol groups to VLAN PE
Table 5-73 Protocol-based VLAN Commands
To configure protocol-based VLANs, follow these steps:
1. First configure VLAN groups for the protocols you want to use (page 4-226). Although not mandatory, we suggest
configuring a separate VLAN for each major protocol running on your network. Do not add port members at this time.
2. Create a protocol group for each of the protocols you want to assign to a VLAN using the protocol-vlan protocol-group
command (General Configuration mode).
3. Then map the protocol for each interface to the appropriate VLAN using the protocol-vlan protocol-group command
(Interface Configuration mode).
protocol-vlan protocol-group (Configuring Groups)
This command creates a protocol group, or adds specific protocols to a group. Use the no form to remove a protocol group.
Syntax
protocol-vlan protocol-group group-id [{add | remove} protocol-type {apple_talk | ip | ipx | 0-ffff frame-type frame}]
no protocol-vlan protocol-group group-id
• group-id - Group identifier of this protocol group. (Range: 1-2147483647)
• frame - Frame type used by this protocol. (Options: ethernet, llc-other, rfc-1042, snap_8021h). The frame type must be
specified if you manually define the protocol type with its hexadecimal code instead of choosing the preconfigured
protocol types of apple_talk, ip or ipx. The three preconfigured protocol types match all frame-types.
Default Setting
No protocol groups are configured.