Specifications

Types of VLANs
ExtremeWare XOS 10.1 Concepts Guide 69
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
— 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 15 protocol filters, each containing a maximum of six protocols, can be defined. On
products that use the Inferno chip set, all 15 protocol filters can be active and configured for use. On all
other platforms, no more than seven protocols can be active and configured for use.
NOTE
For more information on SNAP for Ethernet protocol types, see TR 11802-5:1997 (ISO/IEC) [ANSI/IEEE
std. 802.1H, 1997 Edition].
Deleting a Protocol Filter
If a protocol filter is deleted from a VLAN, the VLAN is assigned a protocol filter of none. You can
continue to configure the VLAN. However, no traffic is forwarded to the VLAN until a protocol is
assigned to it.
Precedence of Tagged Packets Over Protocol Filters
If a VLAN is configured to accept tagged packets on a particular port, incoming packets that match the
tag configuration take precedence over any protocol filters associated with the VLAN.