3Com corebuilder 3500 Implementation Manual page 424

424 C 15: IPX R
HAPTER
Sending node
Network = 000000AA
Node = 000000000001
Socket = 4003
MAC Header
Destination Node =
Source Node =
IPX Header
Checksum =
Packet length =
Transport control = 00
Packet type =
Dest. network =
Dest. node =
Dest. socket =
Source network = 000000AA
Source node =
Source socket =
Data
OUTING
IPX Packet Delivery
Successful packet delivery depends both on proper addressing and on the
network configuration. The packet's Media Access Control (MAC)
protocol header and IPX header address handle packet addressing.
The sending node must have the destination's complete network address,
including the destination network, node, and socket. After the sending
node has the destination address, it can address the packet.
However, the way the MAC header of the packet is addressed depends
on whether a router separates the sending and destination nodes.
Figure 76 shows an example of IPX format routing.
Figure 76 IPX Packet Routing
Node
000000000020
000000000020
000000000001
FFFF
011E
11
000000BB
000000000003
0451
000000000001
4003
Router
Node
000000000021
MAC Header
Destination Node = 000000000003
Source Node =
IPX Header
Checksum =
Packet length =
Transport control = 01
Packet type =
Dest. network =
Dest. node =
Dest. socket =
Source network = 000000AA
Source node =
Source socket =
Data
Destination node
Network = 000000BB
Node = 000000000003
Socket = 0451
000000000021
FFFF
011E
11
000000BB
000000000003
0451
000000000001
4003