ISDN Configuration Example - IPX

Sample Configuration for C2503

C2503#wr t ###### Current configuration: ! version 10.2 ! hostname C2503 ! enable password test ! username C4000 password cisco (See username explanation in the following section.) ipx routing 0000.0c09.509f ipx gns-response-delay 1000 isdn switch-type basic-dms100 ! interface Ethernet0 ipx network 8022A ipx encapsulation SAP ! interface Serial0 no ip address shutdown ! interface Serial1 no ip address shutdown ! interface BRI0 encapsulation ppp bandwidth 56 ipx network 8022B no ipx route-cache ipx watchdog-spoof dialer idle-timeout 300 dialer map ipx 8022B.0000.0c02.e649 name C4000 speed 56 broadcast 14155551234 dialer map ipx 8022B.0000.0c02.e649 name C4000 speed 56 broadcast 14155556789 dialer hold-queue 5 dialer load-threshold 100 dialer-group 1 isdn spid1 408555432101 5554321 isdn spid2 408555987601 5559876 ppp authentication chap ! access-list 900 deny -1 FFFFFFFF 0 FFFFFFFF 452 access-list 900 deny -1 FFFFFFFF 0 FFFFFFFF 453 access-list 900 deny -1 FFFFFFFF 0 FFFFFFFF 457 access-list 900 permit -1 ipx route 8022C 8022B.0000.0c02.e649 ipx route 301586E0 8022B.0000.0c02.e649 ! ipx sap 4 NW410 301586E0.0000.0000.0001 451 2 ! ! dialer-list 1 list 900 ! line con 0 line aux 0 line vty 0 4 password test login ! end

Explanation of C2503 Configuration


C2503#wr t
######
Current configuration:
!
version 10.2
!
hostname C2503
!
enable password test
!
username C4000 password cisco

The username "C4000" is the hostname of the remote router and is used by the dialer map command below. The username is case sensitive and must match the remote router's hostname exactly.

The password, which is used by the CHAP authentication process, is case sensitive and must match the remote router's password exactly.

Note: To avoid confusion, the unencrypted form of the password cisco is shown in this sample configuration. In the actual configuration, the password would appear in its encrypted form: 7 13061E010803, where 7 denotes the encryption type and 13061E010803 is the encrypted form of the password cisco. When entering or making changes to the username command, always type the password in its unencrypted form and do not enter the encryption type (7). It is set automatically.

ipx routing 0000.0c09.509f

This command enables IPX routing. The router will choose a MAC address from one of its interfaces to associate with the process, so you do not need to specify it with the command. Simply enter the command ipx routing.

ipx gns-response-delay 1000

The static SAP command below will advertise the remote server even when the ISDN link is not active. Therefore it may be necessary to increase the period of time before the router replies to a workstation's Get Nearest Server (GNS) request to ensure the local file server can respond first.

isdn switch-type basic-dms100

The ISDN switch type must match your carrier's equipment. If you change the switch-type, you must reload the router for the new switch type to take effect.

interface Ethernet0
ipx network 8022A

8022A = the network number of the local network. To determine this number, type config at the local server's console prompt and use the LAN protocol network number. You don't need to include the leading zeros displayed for the LAN protocol network number with this command.

ipx encapsulation SAP

This command sets the Ethernet frame type of the interface to match that of the local file server. To determine the server's frame type, type config at the local server's console prompt and use the Frame type specified.
Cisco supports the following frame types:
```
 Novell Frame Type     Cisco Encapsulation

    Novell Ethernet_II        arpa
    Novell Ethernet_802.3     novell-ether
    IEEE 802.2                sap
    IEEE 802.2 SNAP           snap
```
If you're running a 3.11 (or earlier) file server your frame type may be Ethernet 802.3. The router defaults to 802.3. To verify what frame type you have, check the file server's autoexc.ncf file.


interface Serial0
no ip address
shutdown
!
interface Serial1
no ip address
shutdown
!
interface BRI0
encapsulation ppp

PPP encapsulation is recommended over HDLC in order to allow the use of CHAP authentication.

bandwidth 56

The default bandwidth setting for a BRI interface is 64k. If you configure your dialer map statements with the speed 56 option, you should include the bandwidth statement.
Note: This command does not control the speed of your ISDN line. It sets the correct reference point for the BRI port's show interface statistics, for the dialer load-threshold command, and for IGRP/EIGRP routing metrics.

ipx network 8022B

8022B = the IPX network number of the ISDN segment for both routers. This network number should be unique to your internetwork.

no ipx route-cache

IPX route cache must be turned off when IPX watchdog spoofing is enabled.

ipx watchdog-spoof

This command enables the router to reply to the local server's watchdog packets on behalf of the remote client. Without it, the server's watchdog packets would be seen as interesting packets and would activate the ISDN link.

dialer idle-timeout 300

This command sets the number of seconds the ISDN connection will remain open if no interesting traffic is being routed. The timer is reset each time an interesting packet is forwarded.

dialer map ipx 8022B.0000.0c02.e649 name C4000 speed 56 broadcast 14155551234
dialer map ipx 8022B.0000.0c02.e649 name C4000 speed 56 broadcast 14155556789

The dialer map command is used with CHAP authentication to place the initial call to the remote router when interesting traffic is forwarded to the BRI interface. Once the connection is active, the dialer idle-timeout command determines how long it will remain active. A dialer map statement is required for each ISDN phone number that will be called. Be aware though, that two dialer map statements pointing to the same location might activate both B channels when you may only want to use one channel.
Note: The command parameters for this example are:
8022B.0000.0c02.e649 = the IPX address of the remote router's BRI interface. To determine this address, type show ipx interface B 0 at the remote router's console prompt.
name C4000 = the hostname of the remote router. The name is case sensitive and should match the name configured for the username command above.
speed 56 = sets the dialer speed to 56k for ISDN circuits that are not 64k end-to-end, and should be included in both routers' dialer map statements. Most installations in North America must be configured for 56K.
broadcast = allows the forwarding of broadcast packets. Unless broadcast packets are specified as interesting packets by the dialer-list command, they will only be forwarded when the ISDN link is active.
14155551234
14155556789 = the remote router's ISDN telephone numbers.

dialer hold-queue 5

This command allows interesting packets to be queued until the ISDN connection is established. It is especially useful when a NetWare login is used to activate the connection to prevent the workstation from timing out. In this example five interesting packets will be queued.

dialer load-threshold 100

This command is used to configure bandwidth on demand by setting the maximum load before the dialer places another call through the second B channel. The load is the calculated weighted average load value for the interface, where 1 is unloaded and 255 is fully loaded. The actual load value you should configure depends on the characteristics of your particular network. In this example, the second B channel will be activated when the load reaches 39% of maximum utilization, which is 100 divided by 255.

dialer-group 1

The dialer-group 1 command enables the dialer-list 1 on the BRI interface, which determines which packets will be interesting and activate the ISDN connection.

isdn spid1 408555432101 5554321
isdn spid2 408555987601 5559876

The isdn spid commands are used if your carrier assigns spids to your ISDN lines.

ppp authentication chap

This command enables CHAP authentication.

access-list 900 deny -1 FFFFFFFF 0 FFFFFFFF 452
access-list 900 deny -1 FFFFFFFF 0 FFFFFFFF 453
access-list 900 deny -1 FFFFFFFF 0 FFFFFFFF 457
access-list 900 permit -1

This access list determines which IPX packets will be interesting and activate the ISDN link. The access-list you should create depends on your particular network design.

Note: The command parameters for this example are:

access-list 900 deny -1 -1 0 -1 452 defines all SAP packets as uninteresting. access-list 900 deny -1 -1 0 -1 453 defines all RIP packets as uninteresting. access-list 900 deny -1 -1 0 -1 457 defines all security packets as uninteresting. access-list 900 permit -1 defines all other packets as interesting.

ipx route 8022C 8022B.0000.0c02.e649

This command creates a static route to the remote router's Ethernet network via the remote router's BRI interface. This is necessary because dynamic routes are removed when the ISDN link is down.
Note: The command parameters for this example are:
8022C = the external IPX network number of the remote network. To determine this number, type config at the remote server's console prompt and use the LAN protocol statement.
8022B.0000.0c02.e649 = the IPX address of the remote router's BRI interface. To determine this address, type show ipx interface B 0 at the remote router's console prompt.

ipx route 301586E0 8022B.0000.0c02.e649

This ipx route command creates a static route to the remote server via the remote router's BRI interface. This is required because dynamic routes are lost when the ISDN link is down.
Note: The command parameters for this example are:
301586E0 = the network portion of the remote server's internal IPX address. To determine this address, type show ipx servers at the remote router's console prompt.
8022B.0000.0c02.e649 = the IPX address of the remote router's BRI interface. To determine this address, type show ipx interface B 0 at the remote router's console prompt.

ipx sap 4 NW410 301586E0.0000.0000.0001 451 2

This command creates a static SAP entry for the remote server which the local router will advertise even when the ISDN link is not active.
Note: The command parameters for this example are:
4 = SAP type (server)
NW410 = name of SAP service
301586E0.0000.0000.0001 = internal IPX network and host address of remote server. To determine this address, type show ipx servers at the remote router's console prompt.
451 = socket (port) number of remote server, which is determined by the command show ipx servers on the remote router.
2 = RIP hop count to the remote server.

dialer-list 1 list 900

This command points to access-list 900, which determines which IPX packets will be interesting.
```
line con 0
line aux 0
line vty 0 4
password test
login
!
end
```

Sample Configuration for C4000

C4000#wr t ###### Current configuration: ! version 10.2 ! hostname C4000 ! enable password test ! username C2503 password cisco (See username explanation in the following section) ipx routing 0000.0c02.e649 ipx gns-response-delay 1000 isdn switch-type basic-dms100 ! interface Ethernet0 ipx network 8022C ipx encapsulation SAP ! interface Serial0 no ip address shutdown ! interface Serial1 no ip address shutdown ! interface BRI0 encapsulation ppp bandwidth 56 ipx network 8022B no ipx route-cache ipx watchdog-spoof dialer idle-timeout 300 dialer map ipx 8022B.0000.0c09.509f name C2503 speed 56 broadcast 14085554321 dialer map ipx 8022B.0000.0c09.509f name C2503 speed 56 broadcast 14085559876 dialer hold-queue 5 dialer load-threshold 100 dialer-group 1 isdn spid1 415555123401 5551234 isdn spid2 415555678901 5556789 ppp authentication chap ! access-list 900 deny -1 FFFFFFFF 0 FFFFFFFF 452 access-list 900 deny -1 FFFFFFFF 0 FFFFFFFF 453 access-list 900 deny -1 FFFFFFFF 0 FFFFFFFF 457 access-list 900 permit -1 ipx route 8022A 8022B.0000.0c09.509f ipx route 2EE67FE3 8022B.0000.0c09.509f ! ipx sap 4 NW312 2EE67FE3.0000.0000.0001 451 2 ! ! dialer-list 1 list 900 ! line con 0 line aux 0 line vty 0 4 password test login ! end

Explanation of C4000 Configuration


C4000#wr t
######
Current configuration:
!
version 10.2
!
hostname C4000
!
enable password test
!
username C2503 password cisco

The username "C4000" is the hostname of the remote router and is used by the dialer map command below. The username is case sensitive and must match the remote router's hostname exactly.

The password, which is used by the CHAP authentication process, is case sensitive and must match the remote router's password exactly.

ipx routing 0000.0c02.e649

This command enables IPX routing. The router will choose a MAC address from one of its interfaces to associate with the process, so you do not need to specify it with the command. Simply enter the command ipx routing.

ipx gns-response-delay 1000

The static SAP command below will advertise the remote server even when the ISDN link is not active. Therefore it may be necessary to increase the period of time before the router replies to a workstation's Get Nearest Server (GNS) request to ensure the local file server can respond first.

isdn switch-type basic-dms100

The ISDN switch type must match your carrier's equipment. If you change the switch-type you must reload the router for the new switch type to take effect.

interface Ethernet0
ipx network 8022C

8022C = the network number of the local network. To determine this number, type config at the local server's console prompt and use the LAN protocol network number. You don't need to include the leading zeros displayed for the LAN protocol network number with this command.

ipx encapsulation SAP

This command sets the Ethernet frame type of the interface to match that of the local file server. To determine the server's frame type, type config at the local server's console prompt and use the Frame type specified.
Cisco supports the following frame types:
```
 Novell Frame Type       Cisco Encapsulation
 

    Novell Ethernet_II          arpa
    Novell Ethernet_802.3       novell-ether
    IEEE 802.2                  sap
    IEEE 802.2 SNAP             snap
```
If you're running a 3.11 (or earlier) file server your frame type may be Ethernet 802.3. The router defaults to 802.3. To verify what frame type you have, check the file server's autoexc.ncf file.


interface Serial0
no ip address
shutdown
!
interface Serial1
no ip address
shutdown
!
interface Serial1
no ip address
shutdown
!
interface BRI0
encapsulation ppp

PPP encapsulation is recommended over HDLC in order to allow the use of CHAP authentication.

bandwidth 56

The default bandwidth setting for a BRI interface is 64k. If you configure your dialer map statements with the speed 56 option, you should include the bandwidth statement.
Note: This command does not control the speed of your ISDN line. It sets the correct reference point for the BRI portπs show interface statistics, for the dialer load-threshold command, and for IGRP/EIGRP routing metrics.

ipx network 8022B

8022B = the IPX network number of the ISDN segment for both routers. This network number should be unique to your internetwork.

no ipx route-cache

IPX route cache must be turned off when IPX watchdog spoofing is enabled.

ipx watchdog-spoof

dialer idle-timeout 300

This command sets the number of seconds the ISDN connection will remain open if no interesting traffic is being routed. The timer is reset each time an interesting packet if forwarded.

dialer map ipx 8022B.0000.0c09.509f name C2503 speed 56 broadcast 14085554321
dialer map ipx 8022B.0000.0c09.509f name C2503 speed 56 broadcast 14085559876

The dialer map command is used with CHAP authentication to place the initial call to the remote router when interesting traffic is forwarded to the BRI interface. Once the connection is active, the dialer idle-timeout command determines how long it will remain active. A dialer map statement is required for each ISDN phone number that will be called. Be aware though, that two dialer map statements pointing to the same location might activate both B channels when you may only want to use one channel.
Note: The command parameters for this example are:
8022B.0000.0c09.509f = the IPX address of the remote router's BRI interface. To determine this address, type show ipx interface B 0 at the remote router's console prompt.
name C2503 = the hostname of the remote router. The name is case sensitive and should match the name configured for the "username" command above.
speed 56 = sets the dialer speed to 56k for ISDN circuits that are not 64k end-to-end, and should be included in both routers' dialer map statements. Most installations in North America must be configured for 56K.
broadcast = allows the forwarding of broadcast packets. Unless broadcast packets are specified as interesting packets by the "dialer-list" command, they will only be forwarded when the ISDN link is active.
14085554321
14085559876 = the remote router's ISDN telephone numbers.

dialer hold-queue 5

This command allows interesting packets to be queued until the ISDN connection is established. It is especially useful when a NetWare login is used to activate the connection to prevent the workstation from timing out. In this example five interesting packets will be queued.

dialer load-threshold 100

This command is used to configure bandwidth on demand by setting the maximum load before the dialer places another call through the second B channel. The load is the calculated weighted average load value for the interface, where 1 is unloaded and 255 is fully loaded. The actual load value you should configure depends on the characteristics of your particular network. In this example, the second B channel will be activated when the load reaches 39% of maximum utilization, which is 100 divided by 255.

dialer-group 1

The dialer-group 1 command enables the dialer-list 1 on the BRI interface.

isdn spid1 408555432101 5554321
isdn spid2 408555987601 5559876

The isdn spid commands are used if your carrier assigns spids to your ISDN lines.

ppp authentication chap

This command enables CHAP authentication.

access-list 900 deny -1 FFFFFFFF 0 FFFFFFFF 452
access-list 900 deny -1 FFFFFFFF 0 FFFFFFFF 453
access-list 900 deny -1 FFFFFFFF 0 FFFFFFFF 457
access-list 900 permit -1

This access list determines which IPX packets will be interesting and activate the ISDN link. The access-list you should create depends on your particular network design.

Note: The command parameters for this example are:

access-list 900 deny -1 -1 0 -1 452 defines all SAP packets as uninteresting. access-list 900 deny -1 -1 0 -1 453 defines all RIP packets to be uninteresting. access-list 900 deny -1 -1 0 -1 457 defines all security packets as uninteresting. access-list 900 permit -1 defines all other packets as interesting.

ipx route 8022A 8022B.0000. 0c09.509f

This command creates a static route to the remote router's Ethernet network via the remote router's BRI interface. This is necessary because dynamic routes are removed when the ISDN link is down.
Note: The command parameters for this example are:
8022A = the external IPX network number of the remote network. To determine this number, type config at the remote server's console prompt and use the LAN protocol statement.
8022B.0000.0c09.509f = the IPX address of the remote router's BRI interface. To determine this address, type show ipx interface B 0 at the remote router's console prompt.

ipx route 2EE67FE3 8022B.0000.0c09.509f

This ipx route command creates a static route to the remote server via the remote router's BRI interface. This is required because dynamic routes are lost when the ISDN link is down.
Note: The command parameters for this example are:
2EE67FE3 = the network portion of the remote server's internal IPX address. To determine this address, type show ipx servers at the remote router's console prompt.
8022B.0000.0c09.509f = the IPX address of the remote router's BRI interface. To determine this address, type show ipx interface B 0 at the remote router's console prompt.

ipx sap 4 NW312 2EE67FE3.0000.0000.0001 451 2

This command creates a static SAP entry for the remote server which the local router will advertise even when the ISDN link is not active.
Note: The command parameters for this example are:
4 = SAP type (server)
NW312 = name of SAP service
2EE67FE3.0000.0000.0001 = internal IPX network and host address of remote server. To determine this address, type show ipx servers at the remote router's console prompt.
451 = socket (port) number of remote server, which is determined by the command show ipx servers on the remote router.
2 = RIP hop count to the remote server.

dialer-list 1 list 900

This command points to access-list 900 which determines which IPX packets will be interesting.
```
line con 0
line aux 0
line vty 0 4
password test
login
!
end
```

Posted: Mon Jan 29 12:11:34 PST 1996

ISDN Configuration Example - IPX

Sample Configuration for C2503

Explanation of C2503 Configuration

Sample Configuration for C4000

Explanation of C4000 Configuration

Copyright 1995 ©Cisco Systems Inc.