Alcatel Carrier Internetworking Solutions Switch/Router 用户手册

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This option can be applied to all media type ports and is set to the following:

In the 

 or 

 commands for FDDI and Token Ring the only choices other than 

default are SNAP or LLC and the default must be one of these. As the factory default is SNAP 
with IPX 802.2 Pass through and SNAP does not imply IPX 802.2 Pass through, the additional 
question about pass through is not asked on FDDI and Token Ring ports. By choosing SNAP, 
it is implied that there is no IPX 802.2 Pass through.

No translation is performed on outbound Ethernet frames where 
the inbound interface was Ethernet. 

IP frames are transmitted as Ethernet II frames.

All IPX frames are transmitted as IEEE 802.2 (LLC) frames.

No translation is performed on Appletalk frames, and we 
currently support only Appletalk Phase II (SNAP format).

Other than IP and IPX, all other Ethernet II or SNAP frames are 
transmitted as Ethernet II frames.

Other IEEE 802.2 with LLC are not translated.

No translation is performed on outbound FDDI or Token Ring frames where
the inbound interface was the same media type.

IP frames are transmitted as SNAP frames.

All IPX frames are transmitted as IEEE 802.2 (LLC) frames.

No translation is performed on Appletalk frames, and we currently support
only Appletalk Phase II (SNAP format).

Other than IP and IPX, all other Ethernet II or SNAP frames are transmitted
as SNAP frames.

Other IEEE 802.2 with LLC are not translated.