If necessary, you can define a customized protocol filter by specifying
EtherType, Logical Link Control (LLC), or Subnetwork Access Protocol (SNAP). Up to six
protocols can be part of a protocol filter. To define a protocol filter:
-
Create a protocol using the following command:
create protocol_name
For example: create protocol fred
The protocol name can have a maximum of 32 characters.
-
Configure the protocol using the following command:
configure protocol_name
add [etype | llc | snap] hex {[etype | llc | snap] hex}
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.
Note
Protocol-based
VLAN for Etype
from 0x0000 to 0x05ff are not classifying as per filter. When traffic arrive with these
Etypes, it is classifed to native VLAN rather protocol based vlan.
- 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:
configure protocol fred add llc feff
configure protocol fred add snap 9999
A maximum of 16 customized protocol filters can be active at a time.
Note
For more information about SNAP for Ethernet
protocol types, see TR 11802-5:1997 (ISO/IEC) [ANSI/IEEE std. 802.1H, 1997
Edition].
