| xxx | +
+
IceWM is a small, but powerful window manager for the X11 Window System whose main goals are the following: + |
+
+ yyy | +
In this configuration we have a Cisco 1604 router connected to a Cisco +3640 router using a serial connection. Both routers are also equipped with +BRI interfaces that will be used for the backup link. The Cisco 1604 is +running Cisco IOS® Software Release 12.1(5)T and the Cisco +3640 is using Cisco IOS 12.1(2). +
Note: Configure and verify that the DDR connection (dialer 1
+with BRI0) is working properly before you configure the backup interface
+and backup delay commands. This will allow you to effectively manage
+troubleshooting dialer profiles, ISDN, Point-to-Point Protocol (PPP) and
+authentication issues before you configure the backup.
+
+
| maui-soho-01 (1600) | +
|---|
+maui-soho-01#show running-config +Building configuration... + +Current configuration : 1687 bytes +! +version 12.1 +no service single-slot-reload-enable +service timestamps debug datetime msec +service timestamps log datetime msec +no service password-encryption +! +hostname maui-soho-01 +! +logging rate-limit console 10 except errors +aaa new-model +aaa authentication login default local +aaa authentication login NO_AUTHEN none +aaa authentication ppp default local +!--- basic AAA configuration for ppp calls +enable secret 5 <deleted> +! +username maui-nas-05 password 0 cisco +!--- username for remote router (maui-nas-05) and +shared secret +!---(used for CHAP authentication) +!--- shared secret must be the same on both sides +ip subnet-zero +no ip finger +! +isdn switch-type basic-ni +! +interface Loopback0 + ip address 172.17.1.1 255.255.255.0 +!--- The loopback address will be used by OSPF for the +router ID. +! +interface Ethernet0 + ip address 172.16.1.1 255.255.255.0 +! +interface Serial0 +!--- Primary Interface + backup delay 10 30 +!--- Backup link will be activated 10 seconds after +primary link + goes down. +!--- Backup link will be deactivated 30 seconds after primary + link + is restored. + backup interface Dialer1 +!--- Interface Dialer 1 will provide backup. + ip address 192.168.10.2 255.255.255.252 + encapsulation ppp + no fair-queue + clockrate 64000 + ppp authentication chap +! +interface BRI0 + ip unnumbered Loopback0 +!--- unnumbered to the Loopback 0 address + encapsulation ppp + dialer pool-member 10 +!--- Assign BRI0 as member of dialer pool 10. +!--- Dialer pool 10 is specified in interface Dialer 1. + isdn switch-type basic-ni + isdn spid1 51255511110101 5551111 + isdn spid2 51255511120101 5551112 + ppp authentication chap +!--- Use ppp chap authentication. + ppp multilink +! +interface Dialer1 +!--- Dialer 1 provides backup for the serial link. + ip address 172.20.10.2 255.255.255.0 +!--- Address for the dialer interface. +!--- The remote side dialer interface is in the same subnet. + encapsulation ppp + dialer pool 10 +!--- defines Dialer pool 10 +!--- BRI 0 is a member of this pool. + dialer remote-name maui-nas-05 +!--- specifies remote router name +!--- This name must match that used by the remote router to + authenticate itself. + dialer idle-timeout 900 +!--- Idle timeout is set to 900 seconds (15 minutes). +!--- The link will be disconnected if there is no interesting + traffic for 900 secs. +!--- Since OSPF hellos are interesting traffic, this will reset + the idle timeout and +!--- cause the link to stay up until the primary link is +!--- restored. + dialer string 5552222 +!--- defines the destination routers phone number + dialer load-threshold 80 outbound +!--- This sets the outbound load level for traffic at +which +!---additional connections will be added to the MP bundle load level. +!--- Values range from 1 (unloaded) to 255 (fully loaded). The threshold +!--- in this case is 80/255=32%. + dialer-group 1 +!--- apply interesting traffic definition from +dialer-list 1 + ppp authentication chap +!--- use ppp chap authentication + ppp multilink +! +router ospf 5 + log-adjacency-changes + network 172.16.1.0 0.0.0.255 area 0 + network 172.17.1.0 0.0.0.255 area 0 + network 172.20.10.0 0.0.0.255 area 0 + network 192.168.10.0 0.0.0.3 area 0 +! +ip classless +no ip http server +! +dialer-list 1 protocol ip permit +!--- All IP traffic is designated as interesting. +!--- This is applied to Interface Dialer 1 using dialer-group 1. +!--- OSPF hello packets will trigger the dial. +! +line con 0 + exec-timeout 0 0 + login authentication NO_AUTHEN + transport input none +line vty 0 4 +! +end+ |
+
| maui-nas-05 (3640) | +
|---|
+maui-nas-05#show running-config +Building configuration... + +Current configuration: +! +version 12.1 +service timestamps debug datetime msec +service timestamps log datetime msec +no service password-encryption +! +hostname maui-nas-05 +! +aaa new-model +aaa authentication login default local +aaa authentication login NO_AUTHEN none +aaa authentication ppp default local +!--- basic AAA configuration for ppp calls +enable secret 5 <deleted> +! +username maui-soho-01 password 0 cisco +!--- username for remote router (maui-soho-01) and +shared secret +!---(used for CHAP authentication) +!--- shared secret must be the same on both sides +ip subnet-zero +! +isdn switch-type basic-ni +! +interface Loopback0 + ip address 172.22.1.1 255.255.255.0 +!--- The loopback address will be used by OSPF for the +router ID. +! +interface Ethernet0/0 + ip address 172.22.53.105 255.255.255.0 +! +interface Ethernet0/1 + no ip address + shutdown +! +interface BRI1/0 + ip unnumbered Loopback0 +!--- unnumbered to the Loopback 0 address + encapsulation ppp + dialer pool-member 20 +!--- Assign BRI0 as member of dialer pool 20. +!--- Dialer pool 20 is specified in interface Dialer 1. + isdn switch-type basic-ni + isdn spid1 51255522220101 5552222 + isdn spid2 51255522230101 5552223 + ppp authentication chap +!--- Use ppp chap authentication. + ppp multilink +! +! <<-- Unused interface configurations have been +removed. +! +interface Serial2/0 +!--- primary interface + ip address 192.168.10.1 255.255.255.252 + encapsulation ppp + no fair-queue + ppp authentication chap +! +! <<--Unused interface configurations have been +removed. +! +interface Dialer1 +!--- Dialer 1 provides backup for the serial link. + ip address 172.20.10.1 255.255.255.0 +!--- address for the dialer interface +!--- The remote side dialer interface is in the same subnet. + encapsulation ppp + dialer remote-name maui-soho-01 +!--- specifies remote router name +!--- This name must match that used by the remote router to + authenticate itself. + dialer pool 20 +!--- defines dialer pool 20 + dialer idle-timeout 900 +!--- Idle timeout is set to 900 seconds (15 minutes). +!--- This is equal to the idle timeout set on maui-soho-01. + Dialer max-call 4096 + dialer-group 1 +!--- apply interesting traffic definition from +dialer-list 1 + ppp authentication chap +!--- Use ppp chap authentication. + ppp multilink +! +router ospf 5 + network 172.20.10.0 0.0.0.255 area 0 + network 172.22.1.0 0.0.0.255 area 0 + network 172.22.53.0 0.0.0.255 area 0 + network 192.168.10.0 0.0.0.3 area 0 + default-information originate +!--- transmit ospf default information +!--- This may be required for remote router to use the BRI DDR + link. +! +ip classless +ip route 0.0.0.0 0.0.0.0 Ethernet0/0 +no ip http server +! +dialer-list 1 protocol ip permit +!--- All IP traffic is designated as interesting. +!--- This is applied to Interface Dialer 1 using dialer-group + 1. +! +line con 0 + login authentication NO_AUTHEN + transport input none +line 97 102 +line aux 0 +line vty 0 4 +! +end + ++ |
+
show ip interface brief - This will show dialer 1(on maui-soho-01) +in standby mode. Using dialer 1 as the backup interface means the physical +interface (BRI0) is not dedicated to the backup. Therefor, BRI 0 can be +used for normal DDR while the primary link is up +
debug dialer - This is used to display DDR information about +the packets received on the dialer interface. +
debug isdn events - This is used to see ISDN activity occurring +on the user side of the ISDN interface. +
debug isdn q931 - Shows call setup and tear down of the ISDN +network connection (Layer 3) between the router and the ISDN switch. +
debug ppp negotiation - Displays information on PPP traffic and +exchanges while negotiating the PPP components including Link Control Protocol +(LCP), Authentication, and NCP. A successful PPP negotiation will first +open the LCP state, then Authenticate, and finally negotiate NCP. +
debug ppp authentication - Displays the PPP authentication protocol +messages, including Challenge Authentication Protocol (CHAP) packet exchanges +and Password Authentication Protocol (PAP) exchanges. If you observe a +failure verify that the chap username and password are configured correctly. +
debug ppp error - This is used to display protocol errors and +error statistics associated with PPP connection negotiation and operation.