Alcatel Carrier Internetworking Solutions Switch/Router ユーザーズマニュアル

Page 18-21

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 the SNAP does not imply pass through the additional ques-
tion about pass through is not asked on FDDI and Token Ring ports as the preference can be 
expressed by choosing default or SNAP explicitly.

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

IP frames are transmitted as SNAP frames.

All IPX frames are transmitted as SNAP 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.

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

IP frames of any encapsulation type are transmitted as SNAP 
frames.

IPX frames received that do not have an IEEE 802.2 encapsula-
tion type, are transmitted as SNAP.

IPX frames received that are of IEEE 802.2 encapsulation type 
are transmitted as SNAP if the LLC passthrough is disabled. If the 
LLC passthrough is enables, these frames will not be translated.

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

All other LLC encapsulated protocols are left as is.