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xStack DES-3800 Series Layer 3 Stackable Fast Ethernet Managed Switch
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Protocol VLAN
The DES -3800 Switch Series incorporates the idea of protocol-based VLANs. This standard, defined by the IEEE 802.1v
standard maps packets to protocol-defined VLANs by examining the type octet within the packet header to discover the type of
protocol associated with it. After assessing the protocol, the Switch will forward the packets to all ports within the protocol-
assigned VLAN. This feature will benefit the administrator by better balancing load sharing and enhancing traffic classification.
The Switch supports fourteen (14) pre-defined protocols for configuration. The user may also choose a protocol that is not one of
the fourteen defined protocols by properly configuring the userDefined protocol VLAN. The supported protocols for the protocol
VLAN function on this switch include IP, IPX, DEC LAT, SNAP, NetBIOS, AppleTalk, XNS, SNA, IPv6, RARP and VINES.
The following is a list of type headers for each protocol listed for VLAN configuration.
Protocol Type Header in Hexadecimal Form
IP over Ethernet 0x0800
IPX 802.3 0xFFFF
IPX 802.2 0xE0E0
IPX SNAP 0x8137
IPX over Ethernet2 0x8137
DEC LAT 0x6004
SNA 802.2 0x0404
netBios 0xF0F0
XNS 0x0600
VINES 0x0BAD
IPv6 0x86DD
AppleTalk 0x809B
RARP 0x8035
SNA over Ethernet2 0x80D5
Figure 7- 49. Protocol VLAN and the corresponding type header
In configuring the user-defined protocol, the administrator must make sure that the pre-defined user type header does not match
any other type header. A match may cause discrepancies within the local network and failure to define the VLAN to which to
forward packets.
The following table describes how to setup Protocol Vlan Group Settings on the Switch. Click L2 Features > Protocol Vlan >
Protocol VLAN Group Settings to view the screen below:
Figure 7- 50. Protocol VLAN Group Settings window
Click the Add button to open the Protocol VLAN Group - ADD window, as shown below:
Figure 7- 51. Protocol VLAN Group - Add window