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IPX Routing Configuration

   

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IPX Basics

  

 

IPX Addressing and Address Structure

  

 

Configuring IPX Addresses

  

 

IPX Routing Configuration

  

 

Configuring IPX Routing Protocols

  

 

Configuring IPX Filtering via Access Lists

  

 

Configuring Basic IPX Dialup Services

  

 

Verifying IPX Connectivity and Troubleshooting

  

 

Configuring IPX Type 20 Packet Forwarding

  

 

Summary

  

 

References

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Cisco Router Configuration

From: Cisco Router Configuration
Author: Bruce Pinsky; Allan Leinwand; Mark Culpepper
Publisher: Cisco Press (53)
More Information

IPX Routing Configuration

The assignment of IPX network.node addresses to IOS devices and interfaces is necessary in order to route IPX. Another vital component is IPX routing. Routers must be routing IPX and have routes to IPX networks in an internetwork to enable full communication, just as in IP networks. To determine where IPX networks exist, routers use a routing table created by routing algorithms, which are also known as routing protocols.

Within IPX, routing protocols can be either static or dynamic in nature. In static protocols, you manually configure the IPX routing table with the network path information. Dynamic routing protocols rely on the routers themselves to advertise information about the different IPX networks to which they are attached. IPX uses three different dynamic routing protocols, which are examined in the section “Configuring IPX Routing Protocols” later in this chapter.

Configuring IPX Routing Commands

As mentioned earlier in this chapter, you enable IPX routing with the global configuration command ipx routing. After IPX routing is enabled, the router builds the routing table used for routing. By default, when an IPX address is configured on a LAN or WAN interface and that interface is placed in an operational state, the IPX network address for that interface is placed in the routing table. All operational interfaces connected to the router are placed in the routing table. If only a single router is in your network, it has information about all of its connected IPX networks, and there is no need to configure static or dynamic routing. Only when two or more routers exist in the network are static or dynamic routing table entries needed.

You can use IOS EXEC command show ipx route to view the IPX routing table. When entered with no parameters, the entire IPX routing table is displayed. The following example shows the SF-2 router on the ZIP network with only the connected operational interfaces and no additional routing table entries:

SF-2#show ipx route
Codes: C - Connected primary network,    c - Connected secondary network
   S - Static, F - Floating static, L - Local (internal), W - IPXWAN
   R - RIP, E - EIGRP, N - NLSP, X - External, A - Aggregate
   s - seconds, u - uses, U - Per-user static

3 Total IPX routes. Up to 1 parallel paths and 16 hops allowed.

No default route known.

C         10 (NOVELL-FDDI),  Fd0
C        150 (NOVELL-ETHER),  Et1
C        200 (NOVELL-ETHER),  Et0

The show ipx route command provides useful data to the network administrator and is the key tool used to determine what path an IPX packet will follow through the network. The output of this command is similar to the show ip route command that displays the IP routing table, as discussed in Chapter 4.

The first section of output is the legend for the first column of the table. It tells you from where a route was derived. Each of the last three lines in this IPX routing table shows a single route to an IPX network, how the route was derived, the IPX LAN encapsulation method, and the interface associated with the route. The C in the first column indicates that all of these routes are known from operational connected primary IPX networks. We explore the show ipx route command in the section “Verifying IPX Routing Configuration” later in this chapter.

Configuring Static Routing

In Chapter 4 we discussed various reasons for using static IP routes. The same reasons can be applied to static IPX routes. You can use the global configuration command ipx route to configure static IPX routes in the IPX routing table.

Verifying IPX Routing Configuration

As noted earlier, the command for verifying IPX routing configuration is the IOS EXEC command show ipx route. In this section, we explore other commands that aid in verifying and managing IPX routing table configuration.

The show ipx route command is the tool used to view the state of the IPX routing table. Whether or not static routes are configured or dynamic routing protocols are running, this command shows whether the routes that have been configured or that are expected to be learned are actually present on the router. We explore dynamic IPX routing protocols in the next section of this chapter. Following is an excerpt from the output of the show ipx route command on the ZIP SF-2 router:

SF-2#show ipx route
Codes:     C - Connected primary network, c - Connected secondary network
    S - Static, F - Floating static, L - Local (internal), W - IPXWAN
    R - RIP, E - EIGRP, N - NLSP, X - External, A - Aggregate
    s - seconds, u - uses
4 Total IPX routes. Up to 1 parallel paths and 16 hops allowed.

No default route known.

C         10 (NOVELL-FDDI),  Fd0
C        150 (NOVELL-ETHER),  Et1
C        200 (NOVELL-ETHER),  Et0
R 100 [02/01] via 100.0000.1c2c.23bb, 19s, Fd0

In the preceding output, we see routes to the directly connected IPX networks on the SF-2 router and a route to IPX network 100 that is dynamically learned, using IPX RIP, from the SF-1 router.

You can view a specific route with the show ipx route command by specifying a network number, just as you can when using the show ip route command. You can clear IPX routes from the routing table using the privileged EXEC command clear ipx route. In debugging IPX routing, you can use this command to manually clear a route and then use show ipx route to verify from where the router learns that route.

   

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