
Configuring AppleTalk Services
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A Domain Header consists of the following fields:
• Destination DI, which contains the DI of the exterior router to which a packet
is forwarded
• Source DI, which contains the DI of the exterior router that is forwarding a
packet
• Version Number, which contains the value 0001
• Reserved, which is reserved for future use and contains the value 0000
• Packet Type, which contains the value 0002 to identify the data that follows as
AppleTalk data, distinguishing it from other data, such as routing data (value
0003)
The receiving exterior router decapsulates the datagram, then forwards it to the
destination AppleTalk end system. F
igure 1-12 shows the format of an AppleTalk
data packet forwarded across an AURP tunnel.
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