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User-defined protocols in protocol-based VLANs

You can create protocol-based VLANs with a user-defined protocol for integration into existing networks where nonstandard protocols are used.

To create a user-defined protocol for a protocol-based VLAN:

1. On the VLAN dialog box, click Insert.

The VLAN, Insert Basic dialog box opens.

2. For the protocol Type field, click byProtocolId.
3. For the Protocolid field, click usrDefined.
4. In the UserDefinedPID field, enter the PID of the protocol in the format: 0x (protocol type in hexadecimal).

In the Passport 8600 modules, the 16-bit PID assigned to a protocol-based VLAN specifies either an Ethertype, a DSAP/SSAP, or a SNAP PID, depending on whether the frame encapsulation is Ethernet 2, 802.2, or LLC-SNAP, respectively.

In the Passport 8100 modules, the 16-bit PID assigned to a protocol-based VLAN only specifies an Ethertype for Ethernet 2 frame encapsulation.

Refer to the section on user-defined protocols in Networking Concepts for the Passport 8000 Series Switch for more information about this topic or to see the actual values and how they are assigned.

The following PIDs are not valid:

• PID0x0000 through 0x05dc: overlap with the 802.3 frame length
• PIDs of predefined protocols (for example, IP, IPX, AppleTalk)
• PID 0x8100: reserved by 802.1Q to identify tagged frames
• PID0x9000: used by the diagnostic loopback frames
• PID0x8808: used by 802.3x pause frames
• PID0x4242: overlaps with the BPDU DSAP/SSAP



Note: In a user-defined protocol-based VLAN on a Passport 8600 module, a potential member becomes an active member when a frame from the specified protocol is received. On a Passport 8100 module, all potential members are active members.

• Basic rules
• Creating a port-based VLAN
• Creating a source IP subnet-based VLAN
• Creating a protocol-based VLAN
• Creating a source MAC address-based VLAN
• Creating a source MAC address-based VLAN (using batch files)