Using the Novell Translation Window 2-97

Bridging
3. Click on the entry you want to change. The SNAP Translation table,
Figure 2-38, will appear.
Figure 2-38. SNAP Translation Table
The Table Entry Þeld will display the index of the entry you are viewing and
conÞguring.
1. To change the SNAP Value (the type field) of this entry, highlight the current
value and type a new one. The SNAP value must be two octets.
2. To set whether this entry will be used in the translation process, click on the
SNAP State button to toggle between enabled and disabled.
3. Click on OK to save your changes to the SNAP Translation table. The new
values will now appear in the table.
Using the Novell Translation Window
The Token Ring-speciÞc Novell Translation window allows you to conÞgure each
bridge port for translation of Novell packets that are received and transmitted
across a Token Ring bridge.
The need for translation arises from the way that stations on Token Ring, FDDI,
and Ethernet media read and write bits. Ethernet transmits and receives each
address byte in Least SigniÞcant Bit Þrst (LSB) order; Token Ring transmits and
receives each address byte in Most SigniÞcant Bit Þrst (MSB) order; and FDDI
transmits each address byte using MSB, and receives using LSB. Translational
bridges must use the appropriate form of LSB/MSB address bit conversion to
allow the destination station to properly recognize its address when a packet
arrives. This conversion is necessary for both IP and IPX (Novell protocol)
packets.
When you select a translation mode, the MAC addresses in the Novell header or
in the MAC header of Novell packets received will be converted from most
signiÞcant bit format to least signiÞcant bit format. LLC layer translation converts
the MAC address in the Novell header; Data Link Layer Translation converts the
MAC address in the MAC header.