Written Lab

7. Add the Ethernet_II frame type to an Ethernet 0 interface, but don’t use a subinterface to accomplish this. Use IPX network number 11a.

Ans- #ip routing
#int eth0/0
#ipx network 11a encapsulation arpa

8. Add the 802.2 and SNAP frame types to an Ethernet 0 interface using subinterfaces. Use 11b and 11c IPX network numbers.

Ans- #ip routing
#int eth0/0
#ipx network 11b encapsulation 802.2
#int eth0/0
#ipx network 11c encapsulation SNAP

9. Write the commands that you can use to verify your IPX configuration.

Ans- show ipx route

Hands-on Labs

In this section, you will configure three 2501 routers with IPX routing. There are two labs. The first one configures IPX routing with 802.3 frame types; the second lab configures multiple frame types on the same physical LAN.

Lab 8.1: Configuring Internetworking Packet Exchange (IPX)

Lab 8.2: Adding Secondary Network Addresses and Multiple Frame Types with IPX

Both labs will use Figure 8.5 to configure the network.

FIGURE 8.5 IPX lab figure

Lab 8.1: Configuring Internetworking Packet Exchange (IPX)

1. Log in a router and go into privileged mode by typing en or enable.
2. Type show protocol or sh prot to see your routed protocols config- ured. Notice that this shows the routed protocol (IP) as well as the configured addresses for each interface.
3. Enable the IPX-routed protocol on your router by using the IPX routing command:

   RouterA#config t
   RouterA(config)#ipx routing
   RouterA(config)#^Z

4. Check your routed protocols again to see if IPX routing is enabled by typing the commands sh prot or show protocol. Notice that IPX rout- ing is enabled, but the interfaces don’t have IPX addresses, only IP addresses.
5. Enable IPX on the individual interfaces by using the interface com- mand ipx network. You can use any number, up to eight characters, hexadecimal (A through F and 0 through 9). Here is an example for router 2501A:
   

   2501A#config t
   2501A(config)#int e0
   2501A(config-if)#ipx network 11
   2501A(config-if)#int to0
   2501A(config-if)#ipx network 15
   2501A(config-if)#int s0
   2501A(config-if)#ipx network 20

6. Configure the other routers in the lab with IPX networking.
7. Test your configuration. One of the best ways to do this is with the show ipx route command.
8. Use the show protocol command and show ipx interface com- mand to see the IPX addresses of an interface.
9. Once you find the IPX address of your neighbor routers, ping using the IPX protocol. (You can either go to the neighbor routers’ console port, use the show protocol or show ipx interface command, or use the CDP protocol to gather the protocol information, as sh cdp entry *.)
10. Use the ipx maximum-paths command to tell a Cisco router that it is possible there is more than one link to a remote network. (The IPX protocol, by default, only looks for one route to a remote network. Once it finds a valid route, it will not consider looking for another route, even if a second route exists.)
11. Verify this command with the show ipx route command.

Lab 8.2: Adding Secondary Network Addresses and Multiple Frame Types with IPX

In Lab 8.1, you added IPX routing to your routers and IPX network numbers to your interfaces. By default, Cisco routers run the 802.3 Ethernet frame type. To add a second frame type (Ethernet supports four) to your Ethernet, use the encapsulation command. However, you need to remember two things: You must use a different network number for each frame type and you cannot add Ethernet frame types to a serial link. Let’s configure Router A with a second frame type on the Ethernet LAN.

1. In Ethernet configuration mode, use the IPX network command with a different IPX network number and then use the encapsulation command. Here is an example on Router A:

RouterA#config t
RouterA(config)#int e0
RouterA(config-if)#ipx network 11a encapsulation?
arpa Novell Ethernet_II
hdlc HDLC on serial links
novell-ether Novell Ethernet_802.3
novell-fddi Novell FDDI RAW
sap IEEE 802.2 on Ethernet, FDDI, Token Ring
snap IEEE 802.2 SNAP on Ethernet, Token Ring, and FDDI

2. Notice the different options available. To use the Ethernet_II frame type, you need to use the arpa keyword. You can use sec instead of the full command secondary. Notice that you are adding the Ethernet_II frame type to your Ethernet LAN off of interface E0 on Router A.

RouterA(config-if)#ipx network 11a encapsulation arpa?
secondary Make this network a secondary network

RouterA(config-if)#ipx network 11a encapsulation arpa secondary

3. You can also add a secondary network number and frame type by using subinterfaces. There is not a functional difference between using the secondary command and subinterfaces. However, using subinter- faces will possibly allow you more configuration control over using the secondary command. Use a subinterface command on an Ether- net network:

RouterC#config t
RouterC(config)#int e0.?
<0-4294967295> Ethernet interface number RouterC(config)#int e0.1500
RouterC(config-subif)#ipx network 10b encap?
arpa Novell Ethernet_II
hdlc HDLC on serial links novell-ether Novell Ethernet_802.3 novell-fddi Novell FDDI RAW
sap IEEE 802.2 on Ethernet, FDDI, Token Ring
snap IEEE 802.2 SNAP on Ethernet, Token Ring, and FDDI
RouterC(config-subif)#ipx network 10b encap sap

4. Notice that you can create over four billion subinterfaces. In the com- mands above, I used a number (1500), with no particular significance. I also configured the frame type of 802.2 to run on the LAN. You do not have to use the secondary command when using subinterfaces.

5. There is one more frame type that can be used on Ethernet: SNAP. Create another subinterface on Ethernet 0.

RouterC#config t
RouterC(config)#int e0.?
<0-4294967295> Ethernet interface number RouterC(config)#int e0.1600
RouterC(config-subif)#ipx network 10c encap?
arpa Novell Ethernet_II
hdlc HDLC on serial links novell-ether Novell Ethernet_802.3
novell-fddi Novell FDDI RAW
sap IEEE 802.2 on Ethernet, FDDI, Token Ring
snap IEEE 802.2 SNAP on Ethernet, Token Ring, and FDDI
RouterC(config-subif)#ipx network 10c encap snap

6. Verify your IPX configuration by using the show ipx route, show ipx interface, and show protocol commands.

7. For practice, configure secondary and subinterfaces on all other routers.

Review Questions

1. Which of the following provides connection-oriented transport to upper-layer protocols?

1. RIP
2. NLSP
3. SPX
4. NCP
5. Ans- C

2. Which of the following can respond to a client GNS request? (Choose all that apply.)

1. Local NetWare server
2. Remote NetWare server
3. Local client
4. Cisco router
5. Ans- D

3. How often do servers exchange RIP and SAP information unless set otherwise?

1. Every 15 seconds
2. Every 30 seconds
3. Every 60 seconds
4. Every 120 seconds
5. Ans- C

4. How can you configure a secondary subinterface on your Ethernet interface?

1. Config t, int 24010
2. Config t, int 0
3. config t, 24000 e0
4. config t, 24000 e100
5. Ans- A

5. Given the IPX address 71.00A0.2494.E939, which of the following is the associated IPX network and node address?

1. Net 00a0. node 2494 E939
2. Net 71 node 00a0.2494.e939
3. 00A0.2494. node E939
4. Net 71 00a0 Node 2494.e939
5. Ans- B

6. If you bring up a new NetWare server and the Novell clients cannot see the server, what could the problem be?

1. You need to upgrade the client
2. You need to load the NetWare
3. You have a frame type
4. New NetWare servers do not support IPX.

7. Which of the following are valid methods of including multiple encap- sulations on a single interface? (Choose all that apply.)

1. Secondary
2. Subinterfaces.
3. Additional physical
4. There is no method to use multiple encapsulations on a single interface.
5. Ans- B

8. Which command would you use to see if you were receiving SAP and RIP information on an interface?

1. sho ipx route
2. sho ipx traffic
3. sho ipx interface
4. sho ipx servers
5. Ans- C

9. Which command would you use to check if the router is hearing your server SAPs?

1. sho ipx route
2. sho ipx traffic
3. sho ipx interface
4. sho ipx servers
5. Ans- D

10. Which commands will allow you to display the IPX address of an interface? (Choose all that apply.)

1. sh ipx route
2. sh int
3. sh prot
4. debug ipx int
5. show ipx inter
6. Ans- A,E

11. You want to forward IPX packets over multiple paths. What com- mand do you use?

1. ipx forward maximum-paths
2. ipx maximum-paths
3. ipx forward
4. ipx forward-paths
5. Ans- B

12. Which of the following are valid Cisco encapsulation names? (Choose all that apply.)

1. arpa = IPX Ethernet
2. hdlc = HDLC on serial links
3. novell-ether = IPX 3
4. novell-fddi = IPX Fddi_Raw
5. sap = IEEE 802.2 on Ethernet, FDDI, and Token Ring
6. snap = IEEE 802.2 SNAP on Ethernet, FDDI, and Token Ring
7. Ans- C,D,E

13. Which commands, at a minimum, must be used to enable IPX net- working?

1. IPX routing, IPX number, network 790
2. IPX routing, int e0, IPX network number 980
3. IPX routing, int e0, IPX network 77790 encapsulation arpa
4. IPX routing, IPX encapsulation SAP, int e0, network 789
5. Ans- C

14. What is the default encapsulation on an Ethernet interface when enabling Novell?

1. SAP
2. 802.2
3. SNAP
4. Token_SNAP
5. 802.3
6. Ethernet_II
7. Ans- E

15. What command will show you the amount of ticks that it takes an IPX packet to reach a remote network?

1. show ticks
2. show ip route
3. show ipx route
4. show ipx traffic
5. Ans- D

16. If you want to run the 802.2 frame type on your Ethernet interface, which encapsulation type should you choose?

1. SNAP
2. 802.2
3. Ethernet_II
4. SAP
5. Novell-Ether
6. Ans- D

17. If you want to enable the Ethernet_II frame type on your Ethernet interface, which encapsulation should you use?

1. arpa
2. rarpa
3. sap
4. rip
5. snap
6. novell-ether
7. Ans- A

18. Which of the following commands will show you the routed protocols running on your Cisco router?

1. show ipx traffic
2. show ip route
3. show protocols
4. show ipx protocols
5. Ans- B

19. Which command will show the network servers advertising on your network?

1. sh novell
2. sh ipx sap
3. sh ipx servers
4. sh servers
5. Ans- C

20. Which command will show you the IPX RIP packets being sent and received on your router?

1. show ip rip
2. sh ipx int
3. debug ipx routing activity
4. debug ipx interface
5. Ans- B