xStack DES-6500 Modular Layer 3 Chassis Ethernet Switch User Manual
VLAN and Trunk Groups
The members of a trunk group have the same VLAN setting. Any VLAN setting on the members of a trunk group will apply to
the other member ports.
NOTE:
In order to use VLAN segmentation in conjunction with port trunk groups, first
set the port trunk group(s), and then configure VLAN settings. If changing the port trunk
grouping with VLANs already in place, reconfiguring the VLAN settings after changing
the port trunk group settings will not be necessary. VLAN settings will automatically
change in conjunction with the change of the port trunk group settings.
Protocol VLANs
The xStack DES-6500 chassis switch incorporates 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
decLAT 0x6000
SNA 802.2
0x0404
netBios 0xF0F0
XNS 0x0600
VINES 0x0BAD
IPV6 0x86DD
AppleTalk 0x809B
RARP 0x8035
SNA over Ethernet2 0x80D5
Table 6- 3. 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.
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