ISDN-back-up configureren met drijvende statische routers

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Bijgewerkt:4 februari 2010
Document-id:12497

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Over deze vertaling

Cisco heeft dit document vertaald via een combinatie van machine- en menselijke technologie om onze gebruikers wereldwijd ondersteuningscontent te bieden in hun eigen taal. Houd er rekening mee dat zelfs de beste machinevertaling niet net zo nauwkeurig is als die van een professionele vertaler. Cisco Systems, Inc. is niet aansprakelijk voor de nauwkeurigheid van deze vertalingen en raadt aan altijd het oorspronkelijke Engelstalige document (link) te raadplegen.

Inleiding

Dit document biedt een voorbeeldconfiguratie voor het implementeren van een ISDN-back-up met drijvende statische routes en biedt basisinformatie over het oplossen van problemen voor dit type configuratie.

Raadpleeg voor informatie over de meest gebruikelijke implementaties van ISDN-back-up en vergelijkingen tussen deze onderdelen het volgende document: Evalueren van back-upinterfaces, zwevende statische routen en Dialer Watch voor DDR-back-up.

Voorwaarden

Vereisten

Er zijn geen specifieke vereisten van toepassing op dit document.

Gebruikte componenten

De informatie in dit document is gebaseerd op de onderstaande software- en hardwareversies.

  • Twee Cisco 2500 routers die Cisco IOS®-softwarereleases 12.2(3) en 12.2(5) uitvoeren

De informatie in dit document is gebaseerd op apparaten in een specifieke laboratoriumomgeving. Alle apparaten die in dit document worden beschreven, hadden een opgeschoonde (standaard)configuratie. Als u in een levend netwerk werkt, zorg er dan voor dat u de potentiële impact van om het even welke opdracht begrijpt alvorens het te gebruiken.

Conventies

Zie de Cisco Technical Tips Convention voor meer informatie over documentconventies.

Configureren

Deze sectie bevat informatie over het configureren van de functies die in dit document worden beschreven.

N.B.: Als u aanvullende informatie wilt vinden over de opdrachten die in dit document worden gebruikt, gebruikt u het Opdrachtupgereedschap (alleen geregistreerde klanten).

Netwerkdiagram

Dit document gebruikt de netwerkinstellingen die in het onderstaande schema zijn weergegeven.

diagram.gif

Configuraties

Dit document maakt gebruik van de onderstaande configuraties.

krimson (Cisco 2500 router) 
krimson#show running-config
 Building configuration...

 !
 version 12.2
 service timestamps debug datetime msec
 service timestamps log datetime msec
 !
 hostname krimson
 !
 username kevin password 0 <password>
 !
 isdn switch-type basic-net3
 !
 !
 interface Loopback0
 ip address 10.7.7.1 255.255.255.0
 !
 interface Serial0
 ip address 10.1.2.1 255.255.255.0
 !
 interface BRI0
 no ip address
 encapsulation ppp
 no ip route-cache
 no ip mroute-cache
 load-interval 30
 dialer pool-member 1
 isdn switch-type basic-net3
 no fair-queue
 no cdp enable
 ppp authentication chap
 !
 interface Dialer0
 ip address 10.9.9.1 255.255.255.0
 encapsulation ppp
 no ip route-cache
 no ip mroute-cache
 dialer pool 1
 dialer remote-name kevin


 dialer string 8114
 dialer-group 1
 no cdp enable
 ppp authentication chap
 !
 ip classless
 ip route 10.8.8.0 255.255.255.0 10.1.2.2
 ip route 10.8.8.0 255.255.255.0 10.9.9.2 180
 no ip http server
 !
 dialer-list 1 protocol ip permit
 !
 !
 line con 0
 exec-timeout 0 0
 line aux 0
 line vty 0 4
 exec-timeout 0 0
 password <password> login
 !
 end

Kevin (Cisco 2500 router) 
kevin#show running-config
 Building configuration...

 Current configuration : 1205 bytes
 !
 version 12.2
 service timestamps debug datetime msec
 service timestamps log datetime msec
 no service password-encryption
 !
 hostname kevin
 !
 username krimson password 0 <password>
 !
 isdn switch-type basic-net3
 !
 !
 !
 interface Loopback0
 ip address 10.8.8.1 255.255.255.0
 !
 interface Serial0
 ip address 10.1.2.2 255.255.255.0
 clockrate 2000000
 !
 interface Serial1
 no ip address
 shutdown
 !
 interface BRI0
 no ip address
 encapsulation ppp
 dialer pool-member 1
 isdn switch-type basic-net3
 no cdp enable
 ppp authentication chap
 !
 interface Dialer0
 ip address 10.9.9.2 255.255.255.0
 encapsulation ppp
 dialer pool 1
 dialer remote-name krimson
 dialer string 8113
 dialer-group 1
 no cdp enable
 ppp authentication chap
 !
 !
 dialer-list 1 protocol ip permit
 !
 !
 line con 0
 exec-timeout 0 0
 line aux 0
 line vty 0 4
 exec-timeout 0 0
 password <password> login
 !
 end

Verifiëren

Deze sectie verschaft informatie die u kunt gebruiken om te bevestigen dat uw configuratie correct werkt.

Bepaalde opdrachten met show worden ondersteund door de tool Output Interpreter (alleen voor geregistreerde klanten). Hiermee kunt u een analyse van de output van opdrachten met show genereren.

  • Toon ip route - Hiermee wordt IP routing in tabelgedeelten weergegeven.

  • Toont interfaces - statistieken van alle interfaces die op de router of toegangsserver zijn geconfigureerd.

Problemen oplossen

Deze sectie bevat informatie waarmee u problemen met de configuratie kunt oplossen.

Opdrachten voor troubleshooting

Bepaalde opdrachten met show worden ondersteund door de tool Output Interpreter (alleen voor geregistreerde klanten). Hiermee kunt u een analyse van de output van opdrachten met show genereren.

Opmerking: Voordat u debug-opdrachten afgeeft, raadpleegt u Belangrijke informatie over debug-opdrachten.

  • debug ISDN Q931 - Informatie over installatie bij oproepen en verwijdering van ISDN-netwerkverbindingen (Layer 3) tussen de lokale router (gebruikerszijde) en het netwerk.

  • debug ISDN-gebeurtenissen - gebeurtenissen van ISDN die aan de gebruikerszijde (op de router) van de ISDN-interface plaatsvinden. De ISDN-gebeurtenissen die kunnen worden weergegeven, zijn Q.931-gebeurtenissen (installatie en verwijdering van ISDN-netwerkverbindingen).

  • debug dialer - Hiermee geeft u informatie over de pakketten of gebeurtenissen op een dialerinterface weer.

  • debug ppp onderhandeling - veroorzaakt het debug ppp bevel om PPP pakketten die tijdens PPP opstarten worden verzonden te tonen, waar PPP opties worden besproken.

  • debug van PPP-verificatie - veroorzaakt de debug ppp-opdracht om verificatieprotocolberichten weer te geven, inclusief Challenge Verificatie Protocol (CHAP)-pakketuitwisselingen en Wachtwoord Verificatieprotocol (PAP)-uitwisselingen.

Uitvoer van voorbeeldprobleemoplossing

Hier kunnen we de reservefunctionaliteit testen door de shutdown te gebruiken en geen sluitingsopdrachten op de seriële interface aan de afstandszijde. Dit leidt derhalve tot de verdwijning van de primaire ip-route naar het betrokken doelnetwerk.

Laten we eerst de beginstatus van de primaire interface en de ip-routingtabel bekijken:

Kant bellen: 

   krimson#show interface serial 0
   Serial0 is up, line protocol is up 
   Hardware is HD64570
   Internet address is 10.1.2.1/24
   MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, 
   reliability 255/255, txload 1/255, rxload 1/255
   Encapsulation HDLC, loopback not set
   Keepalive set (10 sec)
   Last input 00:00:07, output 00:00:07, output hang never
   Last clearing of "show interface" counters never
   Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
   Queueing strategy: weighted fair
   Output queue: 0/1000/64/0 (size/max total/threshold/drops) 
   Conversations 0/1/256 (active/max active/max total)
   Reserved Conversations 0/0 (allocated/max allocated)
   Available Bandwidth 1158 kilobits/sec
   5 minute input rate 1000 bits/sec, 0 packets/sec
   5 minute output rate 0 bits/sec, 0 packets/sec
   92 packets input, 7599 bytes, 0 no buffer
   Received 62 broadcasts, 0 runts, 0 giants, 0 throttles
   0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
   99 packets output, 8991 bytes, 0 underruns
   0 output errors, 0 collisions, 12 interface resets
   0 output buffer failures, 0 output buffers swapped out
   4 carrier transitions
   DCD=up DSR=up DTR=up RTS=up CTS=up
   
   krimson#show ip route
   Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
   D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
   N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
   E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
   i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter
   area
   * - candidate default, U - per-user static route, o - ODR
   P - periodic downloaded static route

   Gateway of last resort is 10.48.74.1 to network 0.0.0.0

   10.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
   C 10.1.2.0/24 is directly connected, Serial0
   S 10.8.8.0/24 [1/0] via 10.1.2.2 
  
 !--- The IP route for the destination network points to the primary link.

   C 10.9.9.0/24 is directly connected, Dialer0
   C 10.7.7.0/24 is directly connected, Loopback0
   C 10.48.74.0/23 is directly connected, Ethernet0
   S* 0.0.0.0/0 [254/0] via 10.48.74.1

Zijde genoemd: 

   kevin#show interface serial 0
   Serial0 is up, line protocol is up 
   Hardware is HD64570
   Internet address is 10.1.2.2/24
   MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, 
   reliability 255/255, txload 1/255, rxload 1/255
   Encapsulation HDLC, loopback not set
   Keepalive set (10 sec)
   Last input 00:00:00, output 00:00:08, output hang never
   Last clearing of "show interface" counters never
   Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
   Queueing strategy: weighted fair
   Output queue: 0/1000/64/0 (size/max total/threshold/drops) 
   Conversations 0/1/256 (active/max active/max total)
   Reserved Conversations 0/0 (allocated/max allocated)
   Available Bandwidth 1158 kilobits/sec
   5 minute input rate 0 bits/sec, 0 packets/sec
   5 minute output rate 0 bits/sec, 0 packets/sec
   106 packets input, 9432 bytes, 0 no buffer
   Received 71 broadcasts, 0 runts, 0 giants, 0 throttles
   0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
   98 packets output, 8016 bytes, 0 underruns
   0 output errors, 0 collisions, 4 interface resets
   0 output buffer failures, 0 output buffers swapped out
   1 carrier transitions
   DCD=up DSR=up DTR=up RTS=up CTS=up
  
   kevin#show ip route
   Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
   D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
   N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
   E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
   i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter
   area
   * - candidate default, U - per-user static route, o - ODR
   P - periodic downloaded static route

   Gateway of last resort is 10.48.74.1 to network 0.0.0.0

   10.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
   C 10.1.2.0/24 is directly connected, Serial0
   C 10.9.9.0/24 is directly connected, Dialer0
   C 10.8.8.0/24 is directly connected, Loopback0
   C 10.48.74.0/23 is directly connected, Ethernet0
   S* 0.0.0.0/0 [254/0] via 10.48.74.1
   kevin#

Nu kunnen we de koppelingsfout simuleren door de opdracht shutdown te gebruiken in de afstandsseriële interface: 

   krimson#
   *Mar 4 15:25:18.302: %LINK-3-UPDOWN: Interface Serial0, changed state to
   down
   *Mar 4 15:25:19.302: %LINEPROTO-5-UPDOWN: Line protocol on Interface
   Serial0, changed state to down

We kunnen hier zien dat de primaire link naar beneden is gegaan.

   krimson#show interface serial 0
   Serial0 is down, line protocol is down 
   Hardware is HD64570
   Internet address is 10.1.2.1/24
   MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, 
   reliability 255/255, txload 1/255, rxload 1/255
   Encapsulation HDLC, loopback not set
   Keepalive set (10 sec)
   Last input 00:00:22, output 00:00:32, output hang never
   Last clearing of "show interface" counters never
   Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
   Queueing strategy: weighted fair
   Output queue: 0/1000/64/0 (size/max total/threshold/drops) 
   Conversations 0/1/256 (active/max active/max total)
   Reserved Conversations 0/0 (allocated/max allocated)
   Available Bandwidth 1158 kilobits/sec
   5 minute input rate 0 bits/sec, 0 packets/sec
   5 minute output rate 0 bits/sec, 0 packets/sec
   108 packets input, 8526 bytes, 0 no buffer
   Received 78 broadcasts, 0 runts, 0 giants, 0 throttles
   0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
   114 packets output, 9895 bytes, 0 underruns
   0 output errors, 0 collisions, 12 interface resets
   0 output buffer failures, 0 output buffers swapped out
   5 carrier transitions
   DCD=down DSR=down DTR=up RTS=up CTS=down
   krimson#

De routingtabeldetails tonen nu dat de drijvende statische route in de routingtabel is geïnstalleerd: 

   krimson#show ip route
   Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
   D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
   N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
   E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
   i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter
   area
   * - candidate default, U - per-user static route, o - ODR
   P - periodic downloaded static route

   Gateway of last resort is 10.48.74.1 to network 0.0.0.0

   10.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
   S 10.8.8.0/24 [180/0] via 10.9.9.2
   C 10.9.9.0/24 is directly connected, Dialer0
   C 10.7.7.0/24 is directly connected, Loopback0
   C 10.48.74.0/23 is directly connected, Ethernet0
   S* 0.0.0.0/0 [254/0] via 10.48.74.1
   krimson#

Op de geroepen router, kunnen we de primaire verbindingsmislukking simuleren gesimuleerd door het bevel van de shutdown op de lokale seriële 0 interface te gebruiken: 

   kevin#configure terminal
   Enter configuration commands, one per line. End with CNTL/Z.
   kevin(config)#interface serial 0
   kevin(config-if)#shutdown

   *Mar 4 15:32:00.250: %LINK-5-CHANGED: Interface Serial0, changed state to
   administratively down
   *Mar 4 15:32:01.250: %LINEPROTO-5-UPDOWN: Line protocol on Interface
   Serial0, changed state to down
   *Mar 4 15:32:03.742: %SYS-5-CONFIG_I: Configured from console by console

Nu kunnen we zien dat de primaire link naar beneden gaat: 

   kevin#show interface serial 0
   Serial0 is administratively down, line protocol is down 
   Hardware is HD64570
   Internet address is 10.1.2.2/24
   MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, 
   reliability 255/255, txload 1/255, rxload 1/255
   Encapsulation HDLC, loopback not set
   Keepalive set (10 sec)
   Last input 00:01:28, output 00:01:18, output hang never
   Last clearing of "show interface" counters never
   Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
   Queueing strategy: weighted fair
   Output queue: 0/1000/64/0 (size/max total/threshold/drops) 
   Conversations 0/1/256 (active/max active/max total)
   Reserved Conversations 0/0 (allocated/max allocated)
   Available Bandwidth 1158 kilobits/sec
   5 minute input rate 0 bits/sec, 0 packets/sec
   5 minute output rate 0 bits/sec, 0 packets/sec
   114 packets input, 9895 bytes, 0 no buffer
   Received 79 broadcasts, 0 runts, 0 giants, 0 throttles
   0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
   108 packets output, 8526 bytes, 0 underruns
   0 output errors, 0 collisions, 4 interface resets
   0 output buffer failures, 0 output buffers swapped out
   1 carrier transitions
   DCD=down DSR=down DTR=up RTS=up CTS=down

Het ping-verkeer dat als interessant verkeer wordt gedefinieerd start de uitgaande vraag via de back-updialer 0-interface. 

   krimson#ping 10.8.8.1

   Type escape sequence to abort.
   Sending 5, 100-byte ICMP Echos to 10.8.8.1, timeout is 2 seconds:

   *Mar 4 15:27:39.618: BR0 DDR: rotor dialout [priority]
   *Mar 4 15:27:39.622: BR0 DDR: Dialing cause ip (s=10.9.9.1, d=10.8.8.1)
   *Mar 4 15:27:39.626: BR0 DDR: Attempting to dial 8114
   *Mar 4 15:27:39.642: ISDN BR0: TX -> SETUP pd = 8 callref = 0x09
   *Mar 4 15:27:39.646: Bearer Capability i = 0x8890
   *Mar 4 15:27:39.654: Channel ID i = 0x83
   *Mar 4 15:27:39.658: Called Party Number i = 0x80, '8114',
   Plan:Unknown, Type:Unknown
   *Mar 4 15:27:39.718: ISDN BR0: RX <- CALL_PROC pd = 8 callref = 0x89
   *Mar 4 15:27:39.722: Channel ID i = 0x89
   *Mar 4 15:27:39.974: ISDN BR0: RX <- CONNECT pd = 8 callref = 0x89
   *Mar 4 15:27:39.990: %LINK-3-UPDOWN: Interface BRI0:1, changed state to up
   *Mar 4 15:27:39.998: %DIALER-6-BIND: Interface BR0:1 bound to profile Di0
   *Mar 4 15:27:40.010: BR0:1 PPP: Treating connection as a callout
   *Mar 4 15:27:40.010: BR0:1 PPP: Phase is ESTABLISHING, Active Open [0 sess, 0 load]
   *Mar 4 15:27:40.014: BR0:1 LCP: O .!!!CONFREQ [Closed] id 19 len 15
   *Mar 4 15:27:40.018: BR0:1 LCP: AuthProto CHAP (0x0305C22305)
   *Mar 4 15:27:40.022: BR0:1 LCP: MagicNumber 0x12D0A490 (0x050612D0A490)
   *Mar 4 15:27:40.030: ISDN BR0: TX -> CONNECT_ACK pd = 8 callref = 0x09
   *Mar 4 15:27:40.054: BR0:1 LCP: I CONFREQ [REQsent] id 9 len 15
   *Mar 4 15:27:40.058: BR0:1 LCP: AuthProto CHAP (0x0305C22305)
   *Mar 4 15:27:40.062: BR0:1 LCP: MagicNumber 0x12D6B638 (0x050612D6B638)
   *Mar 4 15:27:40.066: BR0:1 LCP: O CONFACK [REQsent] id 9 len 15
   *Mar 4 15:27:40.066: BR0:1 LCP: AuthProto CHAP (0x0305C22305)
   *Mar 4 15:27:40.070: BR0:1 LCP: MagicNumber 0x12D6B638 (0x050612D6B638)
   *Mar 4 15:27:40.074: BR0:1 LCP: I CONFACK [ACKsent] id 19 len 15
   *Mar 4 15:27:40.078: BR0:1 LCP: AuthProto CHAP (0x0305C22305)
   *Mar 4 15:27:40.082: BR0:1 LCP: MagicNumber 0x12D0A490 (0x050612D0A490)
   *Mar 4 15:27:40.082: BR0:1 LCP: State is Open
   *Mar 4 15:27:40.086: BR0:1 PPP: Phase is AUTHENTICATING, by both [0 sess, 0 load]
   *Mar 4 !
   Suc15:27:40.090: BR0:1 CHAP: O CHALLENGE id 7 len 28 from "krimson"
   *Mar 4 15:27:40.106: BR0:1 CHAP: I CHALLENGE id 7 len 26 from "kevin"
   *Mar 4 15:27:40.110: BR0:1 CHAP: O RESPONSE id 7 len 28 from "krimson"
   *Mar 4 15:27:40.138: BR0:1 CHAP: I SUCCESS id 7 len 4
   *Mar 4 15:27:40.150: BR0:1 CHAP: I RESPONSE id 7 len 26 from "kevin"
   *Mar 4 15:27:40.158: BR0:1 CHAP: O SUCCESS id 7 len 4
   *Mar 4 15:27:40.162: BR0:1 PPP: Phase is UP [0 sess, 0 load]
   *Mar 4 15:27:40.166: BR0:1 IPCP: O CONFREQ [Not negotiated] id 2 len 10
   *Mar 4 15:27:40.170: BR0:1 IPCP: Address 10.9.9.1 (0x03060A090901)
   *Mar 4 15:27:40.186: BR0:1 IPCP: I CONFREQ [REQsent] id 2 len 10
   *Mar 4 15:27:40.190: BR0:1 IPCP: Address 10.9.9.2 (0x03060A090902)
   *Mar 4 15:27:40.190: BR0:1 IPCP: O CONFACK [REQsent] id 2 len 10
   *Mar 4 15:27:40.194: BR0:1 IPCP: Address 10.9.9.2 (0x03060A090902)
   *Mar 4 15:27:40.202: BR0:1 IPCP: I CONFACK [ACKsent] id 2 len 10
   *Mar 4 15:27:40.206: BR0:1 IPCP: Address 10.9.9.1 (0x03060A090901)
   *Mar 4 15:27:40.206: BR0:1 IPCP: State is Open
   *Mar 4 15:27:40.214: BR0:1 DDR: dialer protocol up
   *Mar 4 15:27:40.218: Di0 IPCP: Install route to 10.9.9.2
   *Mar 4 15:27:41.162: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1,
   changed state to upcess rate is 80 percent (4/5), round-trip min/avg/max =
   36/47/76 ms
   krimson#

Tegelijkertijd tonen de uiteinden die op de geroepen kant lopen de volgende output voor deze zelfde vraag: 

   kevin#   
   *Mar 4 15:34:21.698: ISDN BR0: RX <- SETUP pd = 8 callref = 0x07
   *Mar 4 15:34:21.706: Bearer Capability i = 0x8890
   *Mar 4 15:34:21.714: Channel ID i = 0x89
   *Mar 4 15:34:21.718: Calling Party Number i = 0xA1, '8113',
   Plan:ISDN, Type:National
   *Mar 4 15:34:21.734: Called Party Number i = 0xC1, '8114',
   Plan:ISDN, Type:Subscriber(local)
   *Mar 4 15:34:21.762: ISDN BR0: Event: Received a DATA call from 8113 on B1
   at 64 Kb/s
   *Mar 4 15:34:21.762: ISDN BR0: Event: Accepting the call id 0xC
   *Mar 4 15:34:21.766: BR0:1: interface must be fifo queue, force fifo
   *Mar 4 15:34:21.774: %DIALER-6-BIND: Interface BR0:1 bound to profile Di0
   *Mar 4 15:34:21.786: %LINK-3-UPDOWN: Interface BRI0:1, changed state to up
   *Mar 4 15:34:21.798: BR0:1 PPP: Treating connection as a callin
   *Mar 4 15:34:21.802: BR0:1 PPP: Phase is ESTABLISHING, Passive Open [0 sess,
   0 load]
   *Mar 4 15:34:21.806: BR0:1 LCP: State is Listen
   *Mar 4 15:34:21.818: ISDN BR0: TX -> CALL_PROC pd = 8 callref = 0x87
   *Mar 4 15:34:21.826: Channel ID i = 0x89
   *Mar 4 15:34:21.854: ISDN BR0: TX -> CONNECT pd = 8 callref = 0x87
   *Mar 4 15:34:21.918: ISDN BR0: RX <- CONNECT_ACK pd = 8 callref = 0x07
   *Mar 4 15:34:21.926: Channel ID i = 0x89
   *Mar 4 15:34:21.978: BR0:1 LCP: I CONFREQ [Listen] id 19 len 15
   *Mar 4 15:34:21.982: BR0:1 LCP: AuthProto CHAP (0x0305C22305)
   *Mar 4 15:34:21.986: BR0:1 LCP: MagicNumber 0x12D0A490 (0x050612D0A490)
   *Mar 4 15:34:21.990: BR0:1 LCP: O CONFREQ [Listen] id 9 len 15
   *Mar 4 15:34:21.994: BR0:1 LCP: AuthProto CHAP (0x0305C22305)
   *Mar 4 15:34:21.994: BR0:1 LCP: MagicNumber 0x12D6B638 (0x050612D6B638)
   *Mar 4 15:34:21.998: BR0:1 LCP: O CONFACK [Listen] id 19 len 15
   *Mar 4 15:34:22.002: BR0:1 LCP: AuthProto CHAP (0x0305C22305)
   *Mar 4 15:34:22.006: BR0:1 LCP: MagicNumber 0x12D0A490 (0x050612D0A490)
   *Mar 4 15:34:22.030: BR0:1 LCP: I CONFACK [ACKsent] id 9 len 15
   *Mar 4 15:34:22.034: BR0:1 LCP: AuthProto CHAP (0x0305C22305)
   *Mar 4 15:34:22.034: BR0:1 LCP: MagicNumber 0x12D6B638 (0x050612D6B638)
   *Mar 4 15:34:22.038: BR0:1 LCP: State is Open
   *Mar 4 15:34:22.042: BR0:1 PPP: Phase is AUTHENTICATING, by both [0 sess, 0
   load]
   *Mar 4 15:34:22.046: BR0:1 CHAP: O CHALLENGE id 7 len 26 from "kevin"
   *Mar 4 15:34:22.050: BR0:1 CHAP: I CHALLENGE id 7 len 28 from "krimson"
   *Mar 4 15:34:22.054: BR0:1 CHAP: Waiting for peer to authenticate first
   *Mar 4 15:34:22.070: BR0:1 CHAP: I RESPONSE id 7 len 28 from "krimson"
   *Mar 4 15:34:22.078: BR0:1 CHAP: O SUCCESS id 7 len 4
   *Mar 4 15:34:22.082: BR0:1 CHAP: Processing saved Challenge, id 7
   *Mar 4 15:34:22.090: BR0:1 CHAP: O RESPONSE id 7 len 26 from "kevin"
   *Mar 4 15:34:22.114: BR0:1 CHAP: I SUCCESS id 7 len 4
   *Mar 4 15:34:22.118: BR0:1 PPP: Phase is UP [0 sess, 0 load]
   *Mar 4 15:34:22.122: BR0:1 IPCP: O CONFREQ [Not negotiated] id 2 len 10
   *Mar 4 15:34:22.126: BR0:1 IPCP: Address 10.9.9.2 (0x03060A090902)
   *Mar 4 15:34:22.130: BR0:1 IPCP: I CONFREQ [REQsent] id 2 len 10
   *Mar 4 15:34:22.134: BR0:1 IPCP: Address 10.9.9.1 (0x03060A090901)
   *Mar 4 15:34:22.138: BR0:1 IPCP: O CONFACK [REQsent] id 2 len 10
   *Mar 4 15:34:22.142: BR0:1 IPCP: Address 10.9.9.1 (0x03060A090901)
   *Mar 4 15:34:22.226: BR0:1 IPCP: I CONFACK [ACKsent] id 2 len 10
   *Mar 4 15:34:22.230: BR0:1 IPCP: Address 10.9.9.2 (0x03060A090902)
   *Mar 4 15:34:22.230: BR0:1 IPCP: State is Open
   *Mar 4 15:34:22.242: BR0:1 DDR: dialer protocol up
   *Mar 4 15:34:22.250: Di0 IPCP: Install route to 10.9.9.1
   *Mar 4 15:34:23.114: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1,
   changed state to up
   *Mar 4 15:34:27.794: %ISDN-6-CONNECT: Interface BRI0:1 is now connected to
   8113 krimson

De staat na de back-up is "omhoog":

   krimson#show interface dialer 0
   Dialer0 is up, line protocol is up (spoofing)
   Hardware is Unknown
   Internet address is 10.9.9.1/24
   MTU 1500 bytes, BW 56 Kbit, DLY 20000 usec, 
   reliability 255/255, txload 1/255, rxload 1/255
   Encapsulation PPP, loopback not set
   DTR is pulsed for 1 seconds on reset
   Interface is bound to BR0:1
   Last input never, output never, output hang never
   Last clearing of "show interface" counters 00:13:26
   Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
   Queueing strategy: weighted fair
   Output queue: 0/1000/64/0 (size/max total/threshold/drops) 
   Conversations 0/1/16 (active/max active/max total)
   Reserved Conversations 0/0 (allocated/max allocated)
   Available Bandwidth 42 kilobits/sec
   5 minute input rate 0 bits/sec, 0 packets/sec
   5 minute output rate 0 bits/sec, 0 packets/sec
   36 packets input, 2160 bytes
   36 packets output, 2160 bytes
   Bound to:
   BRI0:1 is up, line protocol is up 
   Hardware is BRI
   MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec, 
   reliability 255/255, txload 1/255, rxload 1/255
   Encapsulation PPP, loopback not set
   Keepalive set (10 sec)
   Time to interface disconnect: idle 00:01:33
   Interface is bound to Di0 (Encapsulation PPP)
   LCP Open
   Open: IPCP
   Last input 00:00:26, output 00:00:01, output hang never
   Last clearing of "show interface" counters never
   Queueing strategy: fifo
   Output queue 0/40, 0 drops; input queue 0/75, 0 drops
   30 second input rate 0 bits/sec, 0 packets/sec
   30 second output rate 0 bits/sec, 0 packets/sec
   126 packets input, 3664 bytes, 0 no buffer
   Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
   0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
   131 packets output, 3777 bytes, 0 underruns
   0 output errors, 0 collisions, 15 interface resets
   0 output buffer failures, 0 output buffers swapped out
   28 carrier transitions

   krimson#show ip route
   Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
   D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
   N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
   E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
   i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter
   area
   * - candidate default, U - per-user static route, o - ODR
   P - periodic downloaded static route

   Gateway of last resort is 10.48.74.1 to network 0.0.0.0

   10.0.0.0/8 is variably subnetted, 5 subnets, 3 masks
   C 10.9.9.2/32 is directly connected, Dialer0
   S 10.8.8.0/24 [180/0] via 10.9.9.2
   C 10.9.9.0/24 is directly connected, Dialer0
   C 10.7.7.0/24 is directly connected, Loopback0
   C 10.48.74.0/23 is directly connected, Ethernet0
   S* 0.0.0.0/0 [254/0] via 10.48.74.1

Op de opgeroepen zijde:

De staat na de back-up is "omhoog". 

   kevin#show interface dialer 0
   Dialer0 is up, line protocol is up (spoofing)
   Hardware is Unknown
   Internet address is 10.9.9.2/24
   MTU 1500 bytes, BW 56 Kbit, DLY 20000 usec, 
   reliability 255/255, txload 1/255, rxload 1/255
   Encapsulation PPP, loopback not set
   DTR is pulsed for 1 seconds on reset
   Interface is bound to BR0:1
   Last input never, output never, output hang never
   Last clearing of "show interface" counters 00:16:18
   Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
   Queueing strategy: weighted fair
   Output queue: 0/1000/64/0 (size/max total/threshold/drops) 
   Conversations 0/1/16 (active/max active/max total)
   Reserved Conversations 0/0 (allocated/max allocated)
   Available Bandwidth 42 kilobits/sec
   5 minute input rate 0 bits/sec, 0 packets/sec
   5 minute output rate 0 bits/sec, 0 packets/sec
   40 packets input, 2224 bytes
   40 packets output, 2224 bytes
   Bound to:
   BRI0:1 is up, line protocol is up 
   Hardware is BRI
   MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec, 
   reliability 255/255, txload 1/255, rxload 1/255
   Encapsulation PPP, loopback not set
   Keepalive set (10 sec)
   Time to interface disconnect: idle 00:01:11
   Interface is bound to Di0 (Encapsulation PPP)
   LCP Open
   Open: IPCP
   Last input 00:00:48, output 00:00:00, output hang never
   Last clearing of "show interface" counters never
   Queueing strategy: fifo
   Output queue 0/40, 0 drops; input queue 0/75, 0 drops
   5 minute input rate 0 bits/sec, 0 packets/sec
   5 minute output rate 0 bits/sec, 0 packets/sec
   136 packets input, 3857 bytes, 0 no buffer
   Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
   0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
   131 packets output, 3744 bytes, 0 underruns
   0 output errors, 0 collisions, 12 interface resets
   0 output buffer failures, 0 output buffers swapped out
   35 carrier transitions

   kevin#show ip route
   Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
   D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
   N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
   E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
   i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter
   area
   * - candidate default, U - per-user static route, o - ODR
   P - periodic downloaded static route

   Gateway of last resort is 10.48.74.1 to network 0.0.0.0

   10.0.0.0/8 is variably subnetted, 4 subnets, 3 masks
   C 10.9.9.0/24 is directly connected, Dialer0
   C 10.8.8.0/24 is directly connected, Loopback0
   C 10.9.9.1/32 is directly connected, Dialer0
   C 10.48.74.0/23 is directly connected, Ethernet0
   S* 0.0.0.0/0 [254/0] via 10.48.74.1

Hier simuleren we het herstel van de primaire verbinding door de opdracht no shutdown te gebruiken op de afstandsseriële interface: 

   krimson# 
   *Mar 4 15:28:58.726: %LINK-3-UPDOWN: Interface Serial0, changed state to up
   *Mar 4 15:28:59.730: %LINEPROTO-5-UPDOWN: Line protocol on Interface
   Serial0, changed state to up

De back-up wordt losgekoppeld nadat de tijdelijke versie is verstreken. 

   krimson#show isdn active

   --------------------------------------------------------------------------------
   ISDN ACTIVE CALLS

   --------------------------------------------------------------------------------
   Call Calling Called Remote Seconds Seconds Seconds Charges
   Type Number Number Name Used Left Idle
   Units/Currency

   --------------------------------------------------------------------------------
   Out 8114 kevin 120 1 118 0
   --------------------------------------------------------------------------------

   krimson#
   *Mar 4 15:29:41.738: BR0:1 DDR: idle timeout
   *Mar 4 15:29:41.742: BR0 DDR: has total 0 call(s), dial_out 0, dial_in 0
   *Mar 4 15:29:41.746: BR0:1 PPP: Treating connection as a callout
   *Mar 4 15:29:41.750: %DIALER-6-UNBIND: Interface BR0:1 unbound from profile
   Di0
   *Mar 4 15:29:41.754: BR0:1 DDR: disconnecting call
   *Mar 4 15:29:41.758: %ISDN-6-DISCONNECT: Interface BRI0:1 disconnected from
   8114 kevin, call lasted 121 seconds
   *Mar 4 15:29:41.774: ISDN BR0: TX -> DISCONNECT pd = 8 callref = 0x09
   *Mar 4 15:29:41.782: Cause i = 0x8090 - Normal call clearing
   *Mar 4 15:29:41.790: Di0 IPCP: Remove route to 10.9.9.2
   *Mar 4 15:29:41.862: ISDN BR0: RX <- RELEASE pd = 8 callref = 0x89
   *Mar 4 15:29:41.886: %LINK-3-UPDOWN: Interface BRI0:1, changed state to down
   *Mar 4 15:29:41.894: BR0:1 IPCP: State is Closed
   *Mar 4 15:29:41.894: BR0:1 PPP: Phase is TERMINATING [0 sess, 0 load]
   *Mar 4 15:29:41.898: BR0:1 LCP: State is Closed
   *Mar 4 15:29:41.898: BR0:1 PPP: Phase is DOWN [0 sess, 0 load]
   *Mar 4 15:29:41.902: BR0:1 DDR: disconnecting call
   *Mar 4 15:29:41.910: ISDN BR0: TX -> RELEASE_COMP pd = 8 callref = 0x09
   *Mar 4 15:29:42.886: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1,
   changed state to down

De eerste staat is nu hersteld. 

   krimson#show ip route
   Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
   D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
   N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
   E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
   i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter
   area
   * - candidate default, U - per-user static route, o - ODR
   P - periodic downloaded static route

   Gateway of last resort is 10.48.74.1 to network 0.0.0.0

   10.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
   C 10.1.2.0/24 is directly connected, Serial0
   S 10.8.8.0/24 [1/0] via 10.1.2.2
   C 10.9.9.0/24 is directly connected, Dialer0
   C 10.7.7.0/24 is directly connected, Loopback0
   C 10.48.74.0/23 is directly connected, Ethernet0
   S* 0.0.0.0/0 [254/0] via 10.48.74.1

Gerelateerde informatie

Revisiegeschiedenis

Revisie Publicatiedatum Opmerkingen
1.0
04-Feb-2010
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