3com 3031 Instruccion De Instalación
35
IPX C
ONFIGURATION
IPX Protocol Overview
IPX (Internetwork Packet Exchange) is a network layer protocol of NetWare. Its
position in NetWare protocol family of Novell is similar to IP’s position in TCP/IP. It
defines such contents as address structure of Novell network.
position in NetWare protocol family of Novell is similar to IP’s position in TCP/IP. It
defines such contents as address structure of Novell network.
IPX protocol is a connectionless protocol. Though both data and destination IPX
address are included in IPX packet, the protocol can not confirm whether a packet
has been forwarded successfully. Such functions as confirmation of forwarding
success and connection control are provided by the protocol at the layer above
IPX. In IPX, any IPX packet is considered as an independent entity, not related to
any other IPX packets logically or sequentially.
address are included in IPX packet, the protocol can not confirm whether a packet
has been forwarded successfully. Such functions as confirmation of forwarding
success and connection control are provided by the protocol at the layer above
IPX. In IPX, any IPX packet is considered as an independent entity, not related to
any other IPX packets logically or sequentially.
IPX protocol functions to fill in addresses, routes and forward information packets.
For packets generated at the upper-layer, IPX forwards them out directly. For user
data packets, IPX will first find the correct path in the routing information table
and then forward them out.
For packets generated at the upper-layer, IPX forwards them out directly. For user
data packets, IPX will first find the correct path in the routing information table
and then forward them out.
In the implementation of V2.00 at present, the support for IPX features is only
provided in the centralized devices.
provided in the centralized devices.
IPX Address Structure
IPX address structure differs from that of IP. An IPX address consists of network
address and node address, in the format of network ID and node value.
address and node address, in the format of network ID and node value.
Here, network ID identifies a physical network where a site lies, with the length of
4 bytes expressed by an 8-digit hexadecimal. It's not necessary to input all of the 8
digits, and the 0s in front can be omitted. The node value is used to identify a
node in the network, with the same structure as MAC address and the length of 6
bytes. And it is input as 3 groups of double-byte digits separated by “-“ and the 0s
in front can be omitted.
4 bytes expressed by an 8-digit hexadecimal. It's not necessary to input all of the 8
digits, and the 0s in front can be omitted. The node value is used to identify a
node in the network, with the same structure as MAC address and the length of 6
bytes. And it is input as 3 groups of double-byte digits separated by “-“ and the 0s
in front can be omitted.
For example, in the IPX address bc.0-0cb-47, the network ID is bc (more
specifically, it is 000000bc) and the node value is 0-0cb-47 (more specifically, it is
0000-00cb-0047). Therefore, IPX address can also be expressed in the form of
N.H-H-H, in which N is network ID and H-H-H is node value.
specifically, it is 000000bc) and the node value is 0-0cb-47 (more specifically, it is
0000-00cb-0047). Therefore, IPX address can also be expressed in the form of
N.H-H-H, in which N is network ID and H-H-H is node value.
RIP
IPX makes use of RIP to maintain and advertise dynamic routing information.
A router mainly functions to forward packets between networks. When a client
sends a packet between networks, instead of knowing what path the packet
should pass to reach the destination, it only knows to transmit the packet to the
nearest router and forward it via the next router. So a router must provide the
network routing information which can be directly sent to destination or needs to
be forwarded, so that when a router receives a packet, it can find the next one to
sends a packet between networks, instead of knowing what path the packet
should pass to reach the destination, it only knows to transmit the packet to the
nearest router and forward it via the next router. So a router must provide the
network routing information which can be directly sent to destination or needs to
be forwarded, so that when a router receives a packet, it can find the next one to