この文書では、フローティング スタティック ルートを使った ISDN バックアップの実装の設定例と、この種の設定に関する基本的なトラブルシューティング情報を提供します。
ISDN バックアップの最も一般的な実装に関する情報とさまざまな実装の比較については、次のドキュメントを参照してください。技術情報:アクセス技術
このドキュメントに特有の要件はありません。
このドキュメントの情報は、次のソフトウェアとハードウェアのバージョンに基づくものです。
Cisco IOS® ソフトウェア リリース 12.2(3) と 12.2(5) を実行している 2 台の Cisco 2500 ルータ
このマニュアルの情報は、特定のラボ環境に置かれたデバイスに基づいて作成されました。このドキュメントで使用するすべてのデバイスは、初期(デフォルト)設定の状態から起動しています。実稼動中のネットワークで作業をしている場合、実際にコマンドを使用する前に、その潜在的な影響について理解しておく必要があります。
ドキュメント表記の詳細は、『シスコ テクニカル ティップスの表記法』を参照してください。
このセクションでは、このドキュメントで説明する機能を設定するために必要な情報を提供しています。
注:この文書で使用されているコマンドの詳細を調べるには、「Command Lookup ツール」を使用してください(登録ユーザのみ)。
このドキュメントでは次の図に示すネットワーク構成を使用しています。
このドキュメントでは、次に示す設定を使用しています。
krimson(Cisco 2500 ルータ) |
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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 ルータ) |
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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 |
ここでは、設定が正しく機能していることを確認するために使用する情報を示します。
一部の show コマンドはアウトプット インタープリタ ツールによってサポートされています(登録ユーザ専用)。このツールを使用することによって、show コマンド出力の分析結果を表示できます。
show ip route:IP ルーティング テーブルのエントリを表示します。
show interfaces:ルータまたはアクセス サーバで設定されたすべてのインターフェイスの統計情報を表示します。
ここでは、設定のトラブルシューティングに使用できる情報を示します。
一部の show コマンドはアウトプット インタープリタ ツールによってサポートされています(登録ユーザ専用)。このツールを使用することによって、show コマンド出力の分析結果を表示できます。
注:debug コマンドを使用する前に、「debug コマンドに関する重要な情報」を参照してください。
debug isdn q931:ローカル ルータ(ユーザ側)とネットワーク間の ISDN ネットワーク接続(レイヤ 3)のコール セットアップやティアダウンに関する情報を表示。
debug isdn events:ISDN インターフェイスのユーザ側(ルータ上の)で発生している ISDN イベントを表示。表示可能 ISDN イベントは Q.931 イベント(コール セットアップと、ISDN ネットワーク接続のティアダウン)です。
debug dialer:ダイヤラ インターフェイス上のパケットまたはイベントに関するデバッグ情報を表示。
debug ppp negotiation:PPP 始動(PPP オプションのネゴシエート)中に伝送される PPP パケットを表示させる。
debug ppp authentication:debug ppp コマンドに、 Challenge Authentication Protocol(CHAP)パケットの交換や パスワード認証プロトコル(PAP)交換などの認証プロトコル メッセージを表示させる。
リモート側のシリアル インターフェイスで shutdown および no shutdown コマンドを使用してバックアップ機能をテストできます。これにより、対象となる宛先ネットワークへのプライマリ IP ルートが消失します。
最初に、プライマリ インターフェイスと IP ルーティング テーブルの初期状態を確認します。
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
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#
次に、リモート シリアル インターフェイスで shutdown コマンドを使用して、リンク障害をシミュレートできます:
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
これで、プライマリ リンクがダウンしたことを確認できます。
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#
ルーティング テーブルの詳細情報に、フローティング スタティック ルートがルーティング テーブルにインストールされたことが示されています。
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#
受信側ルータでは、ローカル側のシリアル 0 インターフェイスで shutdown コマンドを使用して、プライマリ リンク障害をシミュレートできます。
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
これで、プライマリ リンクがダウンしたことが確認できます。
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
対象トラフィックとして定義された ping トラフィックが、バックアップのダイヤラ 0 インターフェイスを介してコールを開始します。
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#
同時に、受信側で実行されている debugs から、同じコールに対して次のような出力が表示されます。
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
バックアップ後の状態は「up」です。
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
バックアップ後の状態は「up」です。
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
次に、リモート シリアル インターフェイスで no shutdown コマンドを使用して、プライマリ リンクのリカバリをシミュレートします。
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
アイドル タイムアウト発生後、バックアップが接続解除されます。
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
これで、初期状態が復元されました。
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
改定 | 発行日 | コメント |
---|---|---|
1.0 |
04-Feb-2010 |
初版 |