3Com 9100 manual Defining Protocol Filters, Create protocol protocolname

74CHAPTER 4: VIRTUAL LANS (VLANS)

Defining Protocol Filters

If necessary, you can define a customized protocol filter based on EtherType, Logical Link Control (LLC), and/or Subnetwork Access Protocol (SNAP). Up to six protocols may be part of a protocol filter. To define a protocol filter, do the following:

1Create a protocol using the following command:

create protocol <protocol_name>

For example:

create protocol fred

The protocol name can have a maximum of 31 characters.

2Configure the protocol using the following command:

config protocol <protocol_name> add <protocol_type>

<hex_value>

Supported protocol types include:

■etype — EtherType

The values for etype are four-digit hexadecimal numbers taken from a list maintained by the IEEE. This list can be found at the following URL:

http://standards.ieee.org/regauth/ethertype/index.html

■llc — LLC Service Advertising Protocol (SAP)

The values for llc are four-digit hexadecimal numbers that are created by concatenating a two-digit LLC Destination SAP (DSAP) and a two-digit LLC Source SAP (SSAP).

■snap — Ethertype inside an IEEE SNAP packet encapsulation.

The values for snap are the same as the values for etype, described previously.

For example:

config protocol fred add llc feff

config protocol fred add snap 9999

A maximum of fifteen protocol filters, each containing a maximum of six protocols, can be defined. However, no more than seven protocols can be active and configured for use.