3com 9100 User Manual
74
C
HAPTER
4: V
IRTUAL
LAN
S
(VLAN
S
)
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:
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:
1 Create 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.
2 Configure 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:
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).
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.
protocols, can be defined. However, no more than seven protocols can be
active and configured for use.