백업 인터페이스를 사용하는 BRI ISDN 백업

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업데이트:2010년 2월 4일
문서 ID:11047

편견 없는 언어

본 제품에 대한 문서 세트는 편견 없는 언어를 사용하기 위해 노력합니다. 본 설명서 세트의 목적상, 편견 없는 언어는 나이, 장애, 성별, 인종 정체성, 민족 정체성, 성적 지향성, 사회 경제적 지위 및 교차성에 기초한 차별을 의미하지 않는 언어로 정의됩니다. 제품 소프트웨어의 사용자 인터페이스에서 하드코딩된 언어, RFP 설명서에 기초한 언어 또는 참조된 서드파티 제품에서 사용하는 언어로 인해 설명서에 예외가 있을 수 있습니다. 시스코에서 어떤 방식으로 포용적인 언어를 사용하고 있는지 자세히 알아보세요.

이 번역에 관하여

Cisco는 전 세계 사용자에게 다양한 언어로 지원 콘텐츠를 제공하기 위해 기계 번역 기술과 수작업 번역을 병행하여 이 문서를 번역했습니다. 아무리 품질이 높은 기계 번역이라도 전문 번역가의 번역 결과물만큼 정확하지는 않습니다. Cisco Systems, Inc.는 이 같은 번역에 대해 어떠한 책임도 지지 않으며 항상 원본 영문 문서(링크 제공됨)를 참조할 것을 권장합니다.

소개

이 문서에서는 ISDN 백업을 위한 샘플 컨피그레이션을 제공하며 이 유형의 컨피그레이션에 대한 기본 트러블슈팅 정보를 제공합니다.

ISDN 백업의 가장 일반적인 구현 및 비교 방법에 대한 자세한 내용은 다음 문서를 참조하십시오. DDR 백업을 위한 백업 인터페이스, 부동 고정 경로 및 다이얼러 감시 평가

사전 요구 사항

요구 사항

이 문서에 대한 특정 요건이 없습니다.

사용되는 구성 요소

이 문서의 정보는 아래 소프트웨어 및 하드웨어 버전을 기반으로 합니다.

  • Cisco IOS® Software 릴리스 12.2(3) 및 12.2(5)를 실행하는 Cisco 2500 라우터(Frame Relay data terminal equipment [DTE]) 2개

  • Frame Relay 스위치 역할을 하는 Cisco 4500 라우터 1대

이 문서의 정보는 특정 랩 환경의 디바이스를 토대로 작성되었습니다. 이 문서에 사용된 모든 디바이스는 초기화된(기본) 컨피그레이션으로 시작되었습니다. 라이브 네트워크에서 작업하는 경우, 사용하기 전에 모든 명령의 잠재적인 영향을 이해해야 합니다.

표기 규칙

문서 규칙에 대한 자세한 내용은 Cisco 기술 팁 표기 규칙을 참조하십시오.

구성

이 섹션에는 이 문서에서 설명하는 기능을 구성하기 위한 정보가 표시됩니다.

참고: 이 문서에 사용된 명령에 대한 추가 정보를 찾으려면 명령 조회 도구(등록된 고객만 해당)를 사용합니다.

네트워크 다이어그램

이 문서에서는 아래 다이어그램에 표시된 네트워크 설정을 사용합니다.

bri_isdn_11047.gif

구성

이 문서에서는 아래 표시된 구성을 사용합니다.

krimson(Cisco 2500 라우터) 
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
ip ospf network point-to-point
!
interface Ethernet0
ip address 10.200.16.30 255.255.255.0
!
interface Serial1
bandwidth 64
no ip address
encapsulation frame-relay
no ip route-cache
no ip mroute-cache
!
interface Serial1.1 point-to-point
backup interface Dialer0
ip address 10.5.5.2 255.255.255.0
no ip route-cache
frame-relay interface-dlci 20 
!
interface BRI0
description Testanschluss ISDN(intern), Nr. 4420038
no ip address
encapsulation ppp
no ip route-cache
no ip mroute-cache
load-interval 30
no keepalive
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 6120
dialer-group 1
no cdp enable
ppp authentication chap
!
router ospf 10
log-adjacency-changes
network 10.5.5.0 0.0.0.255 area 0
network 10.7.7.0 0.0.0.255 area 0
network 10.9.9.0 0.0.0.255 area 0
!
ip default-gateway 10.200.16.1
no ip classless
no ip http server
!
access-list 105 permit ip any host 10.7.7.1
access-list 105 permit ip any host 10.8.8.1
access-list 105 permit ip any any
dialer-list 1 protocol ip permit
!
line con 0
exec-timeout 0 0
privilege level 15
line aux 0
transport input all
line vty 0 4
exec-timeout 0 0
password <password> login
!
end

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

version 12.2
service timestamps debug datetime msec
service timestamps log datetime msec
!
hostname kevin
!
!
username krimson password 0 <password> !
isdn switch-type basic-net3
!
!
interface Loopback0
ip address 10.8.8.1 255.255.255.0
ip ospf network point-to-point
!
interface Loopback1
ip address 172.19.0.1 255.255.255.255
!
interface Ethernet0
ip address 10.200.16.26 255.255.255.0
!
interface Serial0
no ip address
encapsulation frame-relay
!
interface Serial0.1 point-to-point
ip address 10.5.5.1 255.255.255.0
no cdp enable
frame-relay interface-dlci 20 
!
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-group 1
no cdp enable
ppp authentication chap
!
router ospf 10
log-adjacency-changes
network 10.5.5.0 0.0.0.255 area 0
network 10.8.8.0 0.0.0.255 area 0
network 10.9.9.0 0.0.0.255 area 0
!
ip default-gateway 10.200.16.1
ip classless
!
dialer-list 1 protocol ip permit
no cdp run
!        
line con 0        
exec-timeout 0 0
line aux 0
modem InOut
line vty 0 4
exec-timeout 0 0
password <password> login
!
ntp clock-period 17180102
ntp server 10.200.20.134
end

다음을 확인합니다.

이 섹션에서는 컨피그레이션이 제대로 작동하는지 확인하는 데 사용할 수 있는 정보를 제공합니다.

다음 명령을 사용하여 컨피그레이션을 확인합니다.

특정 show 명령은 출력 인터프리터 도구에서 지원되므로 show 명령 출력의 분석을 볼 수 있습니다.

  • show interfaces serial - DLCI(multicast data-link connection identifier), 인터페이스에서 사용되는 DLCI 및 LMI(Local Management Interface)에 사용되는 DLCI에 대한 정보를 표시합니다.

  • show interface dialer - 다이얼러 인터페이스에 대한 정보를 표시합니다.

  • show ip route - IP 라우팅 테이블 항목을 표시합니다. 

   krimson#show interface serial 1.1 

 ! --- The initial state before the simulated Frame Relay network failure. ! --- The primary link is up and functional. 

   
   Serial1.1 is up, line protocol is up 
   Hardware is HD64570
   Internet address is 10.5.5.2/24
   Backup interface Dialer0, failure delay 0 sec, 
   secondary disable delay 0 sec
   MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec, 
   reliability 255/255, txload 1/255, rxload 1/255
   Encapsulation FRAME-RELAY
   
   krimson#show int dialer 0 

 ! --- Initial state. The backup interface is in standby mode and inactive.

   Dialer0 is standby mode (spoofing), line protocol is down (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
   Last input 1w6d, output never, output hang never
   Last clearing of "show interface" counters 6w4d
   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
   596 packets input, 48924 bytes
   600 packets output, 49280 bytes
   
   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 10.200.16.1 to network 0.0.0.0
   
   192.168.64.0/30 is subnetted, 1 subnets
   C 192.168.64.0 is directly connected, Dialer4
   10.0.0.0/24 is subnetted, 6 subnets
   O 10.9.9.0 [110/3347] via 10.5.5.1, 00:03:34, Serial1.1
   O 10.8.8.0 [110/1563] via 10.5.5.1, 00:03:34, Serial1.1 

 ! --- The route to the tested destination network points to the ! --- still-active primary link.

   
   C 10.5.5.0 is directly connected, Serial1.1
   C 10.7.7.0 is directly connected, Loopback0
   C 10.9.8.0 is directly connected, Dialer1
   C 10.200.16.0 is directly connected, Ethernet0
   S* 0.0.0.0/0 [1/0] via 10.200.16.1

여기에서는 프레임 릴레이 인터페이스가 다운되는 것을 확인할 수 있습니다.

   krimson#
   *Apr 16 23:56:47.840: %LINK-3-UPDOWN: Interface Serial1, 
   changed state to down
   *Apr 16 23:56:47.848: OSPF: Interface Serial1.1 going Down 

 ! --- Here we have simulated a failure within the Frame Relay network. ! --- We can see what was conducted to the Frame Relay DTE router, ! --- and the subinterface going down.

   *Apr 16 23:56:47.852: %OSPF-5-ADJCHG: Process 10, 
   Nbr 172.19.0.1 on Serial1.1    
   from FULL to DOWN, Neighbor Down: Interface down or detached
   *Apr 16 23:56:48.736: BACKUP(Serial1.1): event = primary went down
   *Apr 16 23:56:48.740: BACKUP(Serial1.1): changed state to 
   "waiting to backup"
   *Apr 16 23:56:48.744: BACKUP(Serial1.1): event = timer expired
   *Apr 16 23:56:48.748: Di0 DDR is shutdown, could not clear interface.
   *Apr 16 23:56:48.752: BACKUP(Serial1.1): 
   secondary interface (Dialer0) made active 

 ! --- The configured backup interface is active.

   *Apr 16 23:56:48.752: BACKUP(Serial1.1): changed state to "backup mode"
   *Apr 16 23:56:48.756: OSPF: Interface Dialer0 going Up
   *Apr 16 23:56:48.760: BR0 DDR: rotor dialout [priority]
   *Apr 16 23:56:48.764: BR0 DDR: Dialing cause ip (s=10.9.9.1, d=224.0.0.5) 

 ! --- OSPF packets trigger the call.

   *Apr 16 23:56:48.768: BR0 DDR: Attempting to dial 6120
   *Apr 16 23:56:48.784: ISDN BR0: TX -> SETUP pd = 8 callref = 0x3E
   *Apr 16 23:56:48.792: Bearer Capability i = 0x8890
   *Apr 16 23:56:48.796: Channel ID i = 0x83
   *Apr 16 23:56:48.804: Called Party Number i = 0x80, '6120', 
   Plan:Unknown, Type:Unknown
   *Apr 16 23:56:48.844: %LINEPROTO-5-UPDOWN: Line protocol on  
   Interface Serial1, changed state to down
   *Apr 16 23:56:48.884: ISDN BR0: RX <- CALL_PROC pd = 8 callref = 0xBE
   *Apr 16 23:56:48.892: Channel ID i = 0x89
   *Apr 16 23:56:49.144: ISDN BR0: RX <- CONNECT pd = 8 callref = 0xBE
   *Apr 16 23:56:49.160: %LINK-3-UPDOWN: Interface BRI0:1, 
   changed state to up
   *Apr 16 23:56:49.168: %DIALER-6-BIND: 
   Interface BR0:1 bound to profile Di0
   *Apr 16 23:56:49.176: BR0:1 PPP: Treating connection as a callout
   *Apr 16 23:56:49.180: BR0:1 PPP: Phase is ESTABLISHING, Active Open 
   [0 sess, 0 load]
   *Apr 16 23:56:49.184: BR0:1 LCP: O CONFREQ [Closed] id 49 len 15
   *Apr 16 23:56:49.188: BR0:1 LCP: AuthProto CHAP (0x0305C22305)
   *Apr 16 23:56:49.188: BR0:1 LCP: MagicNumber 0xF2143EDB (0x0506F2143EDB)
   *Apr 16 23:56:49.196: ISDN BR0: TX -> CONNECT_ACK pd = 8 callref = 0x3E
   *Apr 16 23:56:49.224: BR0:1 LCP: I CONFREQ [REQsent] id 83 len 15
   *Apr 16 23:56:49.228: BR0:1 LCP: AuthProto CHAP (0x0305C22305)
   *Apr 16 23:56:49.232: BR0:1 LCP: MagicNumber 0x9ADACD69 (0x05069ADACD69)
   *Apr 16 23:56:49.236: BR0:1 LCP: O CONFACK [REQsent] id 83 len 15
   *Apr 16 23:56:49.236: BR0:1 LCP: AuthProto CHAP (0x0305C22305)
   *Apr 16 23:56:49.240: BR0:1 LCP: MagicNumber 0x9ADACD69 (0x05069ADACD69)
   *Apr 16 23:56:49.244: BR0:1 LCP: I CONFACK [ACKsent] id 49 len 15
   *Apr 16 23:56:49.248: BR0:1 LCP: AuthProto CHAP (0x0305C22305)
   *Apr 16 23:56:49.252: BR0:1 LCP: MagicNumber 0xF2143EDB (0x0506F2143EDB)
   *Apr 16 23:56:49.252: BR0:1 LCP: State is Open
   *Apr 16 23:56:49.256: BR0:1 PPP: Phase is AUTHENTICATING, by both 
   [0 sess, 0 load]
   *Apr 16 23:56:49.260: BR0:1 CHAP: O CHALLENGE id 49 len 28 from "krimson"
   *Apr 16 23:56:49.276: BR0:1 CHAP: I CHALLENGE id 51 len 26 from "kevin"
   *Apr 16 23:56:49.284: BR0:1 CHAP: O RESPONSE id 51 len 28 from "krimson"
   *Apr 16 23:56:49.332: BR0:1 CHAP: I SUCCESS id 51 len 4
   *Apr 16 23:56:49.344: BR0:1 CHAP: I RESPONSE id 49 len 26 from "kevin"
   *Apr 16 23:56:49.352: BR0:1 CHAP: O SUCCESS id 49 len 4
   *Apr 16 23:56:49.356: BR0:1 PPP: Phase is UP [0 sess, 0 load]
   *Apr 16 23:56:49.360: BR0:1 IPCP: O CONFREQ [Not negotiated] id 41 len 10
   *Apr 16 23:56:49.364: BR0:1 IPCP: Address 10.9.9.1 (0x03060A090901)
   *Apr 16 23:56:49.376: BR0:1 IPCP: I CONFREQ [REQsent] id 29 len 10
   *Apr 16 23:56:49.380: BR0:1 IPCP: Address 10.9.9.2 (0x03060A090902)
   *Apr 16 23:56:49.384: BR0:1 IPCP: O CONFACK [REQsent] id 29 len 10
   *Apr 16 23:56:49.388: BR0:1 IPCP: Address 10.9.9.2 (0x03060A090902)
   *Apr 16 23:56:49.396: BR0:1 IPCP: I CONFACK [ACKsent] id 41 len 10
   *Apr 16 23:56:49.400: BR0:1 IPCP: Address 10.9.9.1 (0x03060A090901)
   *Apr 16 23:56:49.400: BR0:1 IPCP: State is Open
   *Apr 16 23:56:49.408: BR0:1 DDR: dialer protocol up
   *Apr 16 23:56:49.416: Di0 IPCP: Install route to 10.9.9.2
   *Apr 16 23:56:49.960: OSPF: Rcv hello from 172.19.0.1 area 0 from 
   Dialer0 10.9.9.2
   *Apr 16 23:56:49.964: OSPF: End of hello processing
   *Apr 16 23:56:50.356: %LINEPROTO-5-UPDOWN: 
   Line protocol on Interface BRI0:1, changed state to up
   *Apr 16 23:56:50.748: %LINK-3-UPDOWN: Interface Dialer0, 
   changed state to up
   *Apr 16 23:56:50.752: Di0 LCP: Not allowed on a Dialer Profile
   *Apr 16 23:56:50.752: BACKUP(Dialer0): event = primary came up
   *Apr 16 23:56:55.176: %ISDN-6-CONNECT: 
   Interface BRI0:1 is now connected to 6120 kevin
   *Apr 16 23:56:58.804: OSPF: Rcv DBD from 172.19.0.1 on Dialer0 
   seq 0x988 opt 0x42 flag 0x7 len 32 mtu 1500 state INIT
   *Apr 16 23:56:58.808: OSPF: 2 Way Communication to 172.19.0.1 
   on Dialer0, state 2WAY
   
   krimson#show interface serial 1.1
   Serial1.1 is down, line protocol is down 
   
! --- The primary link is down.

   Hardware is HD64570
   Internet address is 10.5.5.2/24
   Backup interface Dialer0, failure delay 0 sec, 
   secondary disable delay 0 sec
   MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec, 
   reliability 255/255, txload 1/255, rxload 1/255
   Encapsulation FRAME-RELAY
   
   krimson#show interface dialer 0
   Dialer0 is up, line protocol is up (spoofing) 

 ! --- The backup interface is active and bearing traffic.

   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 1w6d, output never, output hang never
   Last clearing of "show interface" counters 6w4d
   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
   614 packets input, 50240 bytes
   618 packets output, 50584 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 not set
   DTR is pulsed for 1 seconds on reset
   Time to interface disconnect: idle 00:01:57
   Interface is bound to Di0 (Encapsulation PPP)
   LCP Open
   Open: IPCP
   Last input 00:00:01, output 00:00:02, 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
   3910 packets input, 394443 bytes, 0 no buffer
   Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
   29 input errors, 18 CRC, 0 frame, 0 overrun, 0 ignored, 11 abort
   3613 packets output, 222417 bytes, 0 underruns
   0 output errors, 0 collisions, 27 interface resets
   0 output buffer failures, 0 output buffers swapped out
   607 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 10.200.16.1 to network 0.0.0.0
 
192.168.64.0/30 is subnetted, 1 subnets
   C 192.168.64.0 is directly connected, Dialer4
   10.0.0.0/8 is variably subnetted, 6 subnets, 2 masks
   C 10.9.9.2/32 is directly connected, Dialer0
   O 10.8.8.0/24 [110/1786] via 10.9.9.2, 00:00:53, Dialer0 
   
! --- The route entry to the destination network is now pointing to ! --- the backup interface as a next hop.

   C 10.9.9.0/24 is directly connected, Dialer0
   C 10.7.7.0/24 is directly connected, Loopback0
   C 10.9.8.0/24 is directly connected, Dialer1
   C 10.200.16.0/24 is directly connected, Ethernet0
   S* 0.0.0.0/0 [1/0] via 10.200.16.1
   
   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:
   !!!!!
   Success rate is 100 percent (5/5), round-trip min/avg/max = 36/36/40 ms

여기서는 프레임 릴레이 네트워크의 장애가 지워지면 시스템이 초기 상태로 되돌아가는 것을 확인할 수 있습니다.

krimson#show interface serial 1.1
   Serial1.1 is up, line protocol is up 
   Hardware is HD64570
   Internet address is 10.5.5.2/24
   Backup interface Dialer0, failure delay 0 sec, 
   secondary disable delay 0 sec
   MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec, 
   reliability 255/255, txload 1/255, rxload 1/255
   Encapsulation FRAME-RELAY
   
   krimson#show interface dialer 0
   Dialer0 is standby mode (spoofing), line protocol is down (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
   Last input 1w6d, output never, output hang never
   Last clearing of "show interface" counters 6w5d
   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
   665 packets input, 54008 bytes
   671 packets output, 54548 bytes
   
   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 10.200.16.1 to network 0.0.0.0
   192.168.64.0/30 is subnetted, 1 subnets
   C 192.168.64.0 is directly connected, Dialer4
   10.0.0.0/24 is subnetted, 6 subnets
   O 10.9.9.0 [110/3347] via 10.5.5.1, 00:08:39, Serial1.1
   O 10.8.8.0 [110/1563] via 10.5.5.1, 00:08:39, Serial1.1
   C 10.5.5.0 is directly connected, Serial1.1
   C 10.7.7.0 is directly connected, Loopback0
   C 10.9.8.0 is directly connected, Dialer1
   C 10.200.16.0 is directly connected, Ethernet0
   S* 0.0.0.0/0 [1/0] via 10.200.16.1
   krimson#

참고: 호출된 측면에는 특정 구성이 필요하지 않습니다.

정상 작업 중에 기록된 동일한 show 출력에는 다음 정보가 포함됩니다.

kevin#show interface serial 0.1
   Serial0.1 is up, line protocol is up 

 ! --- The primary interface is up and running.

   Hardware is HD64570
   Internet address is 10.5.5.1/24
   MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, 
   reliability 255/255, txload 1/255, rxload 1/255
   Encapsulation FRAME-RELAY
   
   kevin#show interface dialer 0
   Dialer0 is up (spoofing), line protocol is up (spoofing) 

 ! --- Note: On the called side, the dialer interface is active ! --- and not in standby mode.

   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
   Last input 1w6d, output never, output hang never
   Last clearing of "show interface" counters 4w2d
   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
   598 packets input, 49252 bytes
   596 packets output, 48924 bytes

   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 10.200.16.1 to network 0.0.0.0
   
   172.17.0.0/32 is subnetted, 1 subnets
   S 172.17.247.195 [1/0] via 10.200.16.1
   172.19.0.0/32 is subnetted, 1 subnets
   C 172.19.0.1 is directly connected, Loopback1
   10.0.0.0/24 is subnetted, 5 subnets
   C 10.5.5.0 is directly connected, Serial0.1
   O 10.7.7.0 [110/65] via 10.5.5.2, 00:04:27, Serial0.1
   C 10.9.9.0 is directly connected, Dialer0
   C 10.8.8.0 is directly connected, Loopback0
   C 10.200.16.0 is directly connected, Ethernet0
   S* 0.0.0.0/0 [1/0] via 10.200.16.1

다음은 장애 시 기록된 것과 동일한 정보입니다. 

kevin#show interface serial 0.1
   Serial0.1 is down, line protocol is down 
   Hardware is HD64570
   Internet address is 10.5.5.1/24
   MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, 
   reliability 255/255, txload 1/255, rxload 1/255
   Encapsulation FRAME-RELAY
   
   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 1w6d, output never, output hang never
   Last clearing of "show interface" counters 4w2d
   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
   618 packets input, 50700 bytes
   616 packets output, 50384 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)
   DTR is pulsed for 1 seconds on reset
   Time to interface disconnect: idle 00:01:57
   Interface is bound to Di0 (Encapsulation PPP)
   LCP Open
   Open: IPCP
   Last input 00:00:03, output 00:00:02, 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
   1280 packets input, 138077 bytes, 0 no buffer
   Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
   9789 input errors, 9789 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
   1309 packets output, 138487 bytes, 0 underruns
   0 output errors, 0 collisions, 15 interface resets
   0 output buffer failures, 0 output buffers swapped out
   351 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 10.200.16.1 to network 0.0.0.0
   172.17.0.0/32 is subnetted, 1 subnets
   S 172.17.247.195 [1/0] via 10.200.16.1
   172.19.0.0/32 is subnetted, 1 subnets
   C 172.19.0.1 is directly connected, Loopback1
   10.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
   O 10.7.7.0/24 [110/1786] via 10.9.9.1, 00:01:21, Dialer0
   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 10.200.16.0/24 is directly connected, Ethernet0
   S* 0.0.0.0/0 [1/0] via 10.200.16.1

문제 해결

이 섹션에서는 컨피그레이션 문제를 해결하는 데 사용할 수 있는 정보를 제공합니다.

여기서 사용되는 라우팅 프로토콜로서 포인트-투-포인트 하위 인터페이스와 OSPF(Open Shortest Path First)가 포함된 프레임 릴레이 컨피그레이션은 이 설정에 따라 다릅니다. 그러나 표시되는 문제 해결 단계는 보다 일반적이며 사용되는 라우팅 프로토콜에 관계없이 프레임 릴레이 포인트-투-멀티포인트 또는 HDLC(High-Level Data Link Control) 또는 PPP(Point-to-Point Protocol) 캡슐화가 포함된 기본 링크와 같은 다른 컨피그레이션과 함께 사용할 수 있습니다.

백업 기능을 확인하기 위해 Frame Relay 스위치로 작동하는 Cisco 4500 라우터의 인터페이스 중 하나가 프레임 릴레이 네트워크 내에서 문제를 시뮬레이션하기 위해 종료 상태로 설정되었습니다. 따라서 Frame Relay 네트워크를 통해 DTE 라우터에 실행되는 PVC 비활성 상태 및 Frame Relay 하위 인터페이스 다운 이벤트가 발생합니다. 이렇게 하면 백업 인터페이스가 활성화됩니다.

문제 해결 명령

참고: debug 명령을 실행하기 전에 디버그 명령에 대한 중요 정보를 참조하십시오.

  • 디버그 isdn q931

  • 디버그 백업 - 백업 이벤트를 디버깅합니다.

  • debug dialer - 다이얼러 인터페이스의 패킷 또는 이벤트에 대한 디버깅 정보를 표시합니다.

  • debug ppp negotiation - debug ppp ppp 명령이 PPP 시작 중에 전송된 PPP 패킷을 표시하도록 합니다. 여기서 PPP 옵션은 협상됩니다.

  • debug ppp authentication - debug ppp 명령이 CHAP(Challenge Authentication Protocol) 패킷 교환 및 PAP(Password Authentication Protocol) 교환을 비롯한 인증 프로토콜 메시지를 표시하도록 합니다.

  • debug ip ospf events - 인접성, 플러딩 정보, 지정된 라우터 선택, SPF(shortest path first) 계산 등 OSPF 관련 이벤트에 대한 정보를 표시합니다.

  • debug frame-relay events - 멀티캐스트 채널을 지원하고 동적 주소 지정을 사용하는 네트워크에서 프레임 릴레이 ARP 회신에 대한 디버깅 정보를 표시합니다.

관련 정보

개정 이력

개정 게시 날짜 의견
1.0
04-Feb-2010
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