Este documento fornece uma configuração de exemplo para a BRI (Basic Rate Interface Interface de Taxa Básica) de ISDN e ilustra o comportamento do roteador da Cisco em relação ao processo de negociação do TEI (Terminal Enpoint Identifier).
Não existem requisitos específicos para este documento.
As informações neste documento são baseadas nestas versões de software e hardware:
Cisco IOS? Software versão 12.2(6)
Todas as plataformas de hardware.
Observação: o comando isdn tei-negotiation preserve foi introduzido nas versões 12.2(6) e 12.2(6)T do software Cisco IOS.
The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.
Para obter mais informações sobre convenções de documento, consulte as Convenções de dicas técnicas Cisco.
Em alguns países europeus (como Bélgica e Holanda), a prática habitual é que a companhia telefônica (Telco) desconecta a camada 1 da ISDN quando a linha BRI não está ativa por um certo período, devido a razões de economia de energia. Essas alternativas são possíveis:
Os TEIs que já foram atribuídos podem ser preservados após a Camada 1 parar de oscilar.
O Cisco IOS Software pode ser configurado para renegociar o TEI toda vez que a Camada 1 oscila.
Nesta seção, você encontrará informações para configurar os recursos descritos neste documento.
Observação: para encontrar informações adicionais sobre os comandos usados neste documento, use a ferramenta Command Lookup Tool (somente clientes registrados).
Este documento utiliza a seguinte configuração de rede:
Neste exemplo, estamos usando dois roteadores Cisco 2500 com linhas BRI.
Este documento utiliza as seguintes configurações:
kevin
krimson
kevin |
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kevin#show running-config ! version 12.2 service timestamps debug datetime msec service timestamps log datetime msec hostname kevin ! username krimson password ! isdn switch-type basic-net3 ! interface BRI0 no ip address encapsulation ppp dialer rotary-group 1 dialer-group 1 isdn switch-type basic-net3 isdn tei-negotiation preserve no cdp enable ppp authentication chap ! interface Dialer1 ip address 10.9.8.2 255.255.255.0 encapsulation ppp dialer in-band dialer map ip 10.9.8.1 name krimson 027208196 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 login ! end |
krimson |
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krimson#show running-config ! version 12.2 ! service timestamps debug datetime msec service timestamps log datetime msec ! hostname krimson ! username kevin password ! isdn switch-type basic-net3 ! interface BRI0 no ip address encapsulation ppp no ip route-cache no ip mroute-cache no keepalive dialer rotary-group 1 isdn switch-type basic-net3 no fair-queue no cdp enable ppp authentication chap ! interface Dialer1 ip address 10.9.8.1 255.255.255.0 encapsulation ppp no ip route-cache no ip mroute-cache load-interval 30 no keepalive dialer in-band dialer map ip 10.9.8.2 name kevin 027202094 dialer-group 1 no fair-queue 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 login ! end |
Esta seção fornece informações que você pode usar para confirmar se sua configuração está funcionando adequadamente.
A Output Interpreter Tool (somente clientes registrados) oferece suporte a determinados comandos show, o que permite exibir uma análise da saída do comando show.
show isdn status???exibe o status de todas as interfaces ISDN.
kevin#show isdn status Global ISDN Switchtype = basic-net3 ISDN BRI0 interface dsl 0, interface ISDN Switchtype = basic-net3 Layer 1 Status: DEACTIVATED Layer 2 Status: Layer 2 NOT Activated !--- TEI is removed Layer 3 Status: 0 Active Layer 3 Call(s) Active dsl 0 CCBs = 0 The Free Channel Mask: 0x3 Number of L2 Discards = 0, L2 Session ID = 10 Total Allocated ISDN CCBs = 0
Esta seção fornece informações que podem ser usadas para o troubleshooting da sua configuração.
Observação: antes de inserir o comando debug, consulte Informações importantes sobre os comandos debug.
debug isdn q921???exibe os procedimentos de acesso da camada de enlace de dados (camada 2) que estão ocorrendo no roteador no canal D (LAPD) de sua interface ISDN.
debug isdn q931???exibe informações sobre a configuração de chamadas e a desconexão de conexões de rede ISDN (camada 3), entre o roteador local (lado do usuário) e a rede.
debug isdn events???exibe eventos ISDN que ocorrem no lado do usuário (no roteador) da interface ISDN.
debug bri????exibe informações de depuração na atividade de roteamento BRI ISDN.
Aqui está a saída debug em kevin:
kevin# *Mar 1 03:04:14.235: BRI: write_sid: scp = 0, wrote = 92 *Mar 1 03:04:14.235: BRI: write_sid: scp = 80, wrote = 93 *Mar 1 03:04:14.239: BRI0: DEACTIVATED, state F1, event LSD *Mar 1 03:04:14.243: BRI: write_sid: scp = 0, wrote = 1B *Mar 1 03:04:14.243: BRI: write_sid: scp = 0, wrote = 20 *Mar 1 03:04:14.243: BRI: write_sid: scp = 0, wrote = 92 *Mar 1 03:04:14.247: BRI: write_sid: scp = A0, wrote = 93 *Mar 1 03:04:14.247: BRI0: DEACTIVATED, state F3, event AP *Mar 1 03:04:14.251: BRI: write_sid: scp = 0, wrote = 3 *Mar 1 03:04:14.255: ISDN BR0: Recvd MPH_IIC_IND from L1 *Mar 1 03:04:14.263: BRI: write_sid: scp = 0, wrote = 92 *Mar 1 03:04:14.263: BRI: write_sid: scp = E0, wrote = 93 *Mar 1 03:04:14.267: BRI0: PENDING, state F7, event AI *Mar 1 03:04:14.267: BRI: Received activation indication. *Mar 1 03:04:14.271: Flush all frames in the queue if any *Mar 1 03:04:14.275: ISDN BR0: L1 is IF_ACTIVE *Mar 1 03:04:14.275: ISDN BR0 EVENT: isdn_sw_cstate: State = 4, Old State = 4 *Mar 1 03:04:14.279: ISDN BR0: Incoming call id = 0x0030, dsl 0 *Mar 1 03:04:14.319: ISDN BR0: TX -> IDREQ ri=65279 ai=127 *Mar 1 03:04:14.323: BRI: write_sid: scp = 0, wrote = E *Mar 1 03:04:14.355: ISDN BR0: RX <- IDASSN ri=65279 ai=66 *Mar 1 03:04:14.375: ISDN BR0: TX -> SABMEp c/r=0 sapi=0 tei=66 *Mar 1 03:04:14.379: BRI: write_sid: scp = 0, wrote = E *Mar 1 03:04:14.399: ISDN BR0: RX <- UI c/r=1 sapi=0 tei=127 i=0x08011C05A1040288901801896C0A218332373230383139367009A13237323032303934 *Mar 1 03:04:14.435: SETUP pd = 8 callref = 0x1C *Mar 1 03:04:14.443: Sending Complete *Mar 1 03:04:14.443: Bearer Capability i = 0x8890 *Mar 1 03:04:14.451: Channel ID i = 0x89 *Mar 1 03:04:14.455: Calling Party Number i = 0x21, 0x83, '27208196', Plan:ISDN, Type:National *Mar 1 03:04:14.475: Called Party Number i = 0xA1, '27202094', Plan:ISDN, Type:National *Mar 1 03:04:14.495: ISDN BR0: RX <- UAf c/r=0 sapi=0 tei=66 *Mar 1 03:04:14.503: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0, TEI 66 changed to up *Mar 1 03:04:14.515: CCBRI_Go Fr L3 pkt (Len=35) : *Mar 1 03:04:14.515: 5 1 9C 90 A1 4 2 88 90 18 1 89 6C A 21 83 32 37 32 30 38 31 39 36 70 9 A1 32 37 32 30 32 30 39 34 *Mar 1 03:04:14.527: *Mar 1 03:04:14.531: ISDN BR0: Incoming call id = 0x0031, dsl 0 *Mar 1 03:04:14.535: ISDN BR0: LIF_EVENT: ces/callid 1/0x31 HOST_INCOMING_CALL *Mar 1 03:04:14.543: ISDN BR0: HOST_INCOMING_CALL: (non-POTS) DATA *Mar 1 03:04:14.543: ISDN BR0: HOST_INCOMING_CALL: (1) call_type = DATA *Mar 1 03:04:14.547: ISDN BR0: HOST_INCOMING_CALL: voice_answer_data = FALSE call type is DATA *Mar 1 03:04:14.551: ISDN BR0: Event: Received a DATA call from 27208196 on B1 at 64 Kb/s *Mar 1 03:04:14.551: ISDN BR0: Event: Accepting the call id 0x31 *Mar 1 03:04:14.555: ISDN BR0: RM returned call_type 0 resource type 0 response 1 *Mar 1 03:04:14.559: CCBRI_Go Fr Host InPkgInfo (Len=9) : *Mar 1 03:04:14.563: 7 0 1 0 31 3 18 1 89 *Mar 1 03:04:14.567: *Mar 1 03:04:14.575: ISDN BR0: isdn_send_connect(): msg 4, call id 0x31, ces 1 bchan 0, call type DATA *Mar 1 03:04:14.579: BRI: enable channel B1 *Mar 1 03:04:14.579: %LINK-3-UPDOWN: Interface BRI0:1, changed state to up *Mar 1 03:04:14.591: ISDN: get_isdn_service_state(): idb 0x230B74 bchan 2 is_isdn 1 Not a Pri *Mar 1 03:04:14.595: CCBRI_Go Fr Host InPkgInfo (Len=6) : *Mar 1 03:04:14.599: 4 0 1 0 31 0 *Mar 1 03:04:14.603: *Mar 1 03:04:14.615: ISDN BR0: TX -> INFOc sapi=0 tei=66 ns=0 nr=0 i=0x08019C02180189 *Mar 1 03:04:14.627: CALL_PROC pd = 8 callref = 0x9C *Mar 1 03:04:14.631: Channel ID i = 0x89 *Mar 1 03:04:14.639: BRI: write_sid: scp = 0, wrote = E *Mar 1 03:04:14.663: ISDN BR0: RX <- RRr sapi=0 tei=66 nr=1 *Mar 1 03:04:14.675: ISDN BR0: TX -> INFOc sapi=0 tei=66 ns=1 nr=0 i=0x08019C07 *Mar 1 03:04:14.679: CONNECT pd = 8 callref = 0x9C *Mar 1 03:04:14.687: BRI: write_sid: scp = 0, wrote = E *Mar 1 03:04:14.711: ISDN BR0: RX <- RRr sapi=0 tei=66 nr=2 *Mar 1 03:04:15.567: ISDN BR0: RX <- INFOc sapi=0 tei=66 ns=0 nr=2 i=0x08011C0F *Mar 1 03:04:15.575: CONNECT_ACK pd = 8 callref = 0x1C *Mar 1 03:04:15.595: ISDN BR0: TX -> RRr sapi=0 tei=66 nr=1 *Mar 1 03:04:15.595: BRI: write_sid: scp = 0, wrote = E *Mar 1 03:04:15.619: CCBRI_Go Fr L3 pkt (Len=4) : *Mar 1 03:04:15.619: F 1 9C 92 *Mar 1 03:04:15.623: *Mar 1 03:04:15.627: ISDN BR0: LIF_EVENT: ces/callid 1/0x31 HOST_CONNECT *Mar 1 03:04:15.631: BRI: enable channel B1 *Mar 1 03:04:15.631: ISDN BR0: Event: Connected to 27208196 on B1 at 64 Kb/s *Mar 1 03:04:16.223: BR0:1 DDR: dialer protocol up *Mar 1 03:04:17.187: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1, changed state to up *Mar 1 03:04:20.591: %ISDN-6-CONNECT: Interface BRI0:1 is now connected to 027208196 krimson *Mar 1 03:04:25.591: ISDN BR0: TX -> RRp sapi=0 tei=66 nr=1 *Mar 1 03:04:25.595: BRI: write_sid: scp = 0, wrote = E *Mar 1 03:04:25.615: ISDN BR0: RX <- RRf sapi=0 tei=66 nr=2
kevin#show isdn status Global ISDN Switchtype = basic-net3 ISDN BRI0 interface dsl 0, interface ISDN Switchtype = basic-net3 Layer 1 Status: ACTIVE Layer 2 Status: TEI = 66, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED I_Queue_Len 0, UI_Queue_Len 0 Layer 3 Status: 1 Active Layer 3 Call(s) CCB:callid=31, sapi=0, ces=1, B-chan=1, calltype=DATA Active dsl 0 CCBs = 1 The Free Channel Mask: 0x80000002 Number of L2 Discards = 0, L2 Session ID = 10 Total Allocated ISDN CCBs = 1
kevin# *Mar 1 03:04:35.623: ISDN BR0: TX -> RRp sapi=0 tei=66 nr=1 *Mar 1 03:04:35.627: BRI: write_sid: scp = 0, wrote = E *Mar 1 03:04:35.647: ISDN BR0: RX <- RRf sapi=0 tei=66 nr=2 *Mar 1 03:04:45.655: ISDN BR0: TX -> RRp sapi=0 tei=66 nr=1 *Mar 1 03:04:45.659: BRI: write_sid: scp = 0, wrote = E *Mar 1 03:04:45.679: ISDN BR0: RX <- RRf sapi=0 tei=66 nr=2 *Mar 1 03:04:55.683: ISDN BR0: RX <- RRp sapi=0 tei=66 nr=2 *Mar 1 03:04:55.691: ISDN BR0: TX -> RRf sapi=0 tei=66 nr=1 *Mar 1 03:04:55.695: BRI: write_sid: scp = 0, wrote = E *Mar 1 03:05:05.691: ISDN BR0: TX -> RRp sapi=0 tei=66 nr=1 *Mar 1 03:05:05.695: BRI: write_sid: scp = 0, wrote = E *Mar 1 03:05:05.715: ISDN BR0: RX <- RRf sapi=0 tei=66 nr=2 *Mar 1 03:05:15.724: ISDN BR0: TX -> RRp sapi=0 tei=66 nr=1 *Mar 1 03:05:15.728: BRI: write_sid: scp = 0, wrote = E *Mar 1 03:05:15.748: ISDN BR0: RX <- RRf sapi=0 tei=66 nr=2 *Mar 1 03:05:25.756: ISDN BR0: TX -> RRp sapi=0 tei=66 nr=1 *Mar 1 03:05:25.760: BRI: write_sid: scp = 0, wrote = E *Mar 1 03:05:25.780: ISDN BR0: RX <- RRf sapi=0 tei=66 nr=2 *Mar 1 03:05:35.788: ISDN BR0: TX -> RRp sapi=0 tei=66 nr=1 *Mar 1 03:05:35.792: BRI: write_sid: scp = 0, wrote = E *Mar 1 03:05:35.812: ISDN BR0: RX <- RRf sapi=0 tei=66 nr=2 *Mar 1 03:05:45.820: ISDN BR0: TX -> RRp sapi=0 tei=66 nr=1 *Mar 1 03:05:45.824: BRI: write_sid: scp = 0, wrote = E *Mar 1 03:05:45.844: ISDN BR0: RX <- RRf sapi=0 tei=66 nr=2 *Mar 1 03:05:55.852: ISDN BR0: TX -> RRp sapi=0 tei=66 nr=1 *Mar 1 03:05:55.856: BRI: write_sid: scp = 0, wrote = E *Mar 1 03:05:55.880: ISDN BR0: RX <- RRf sapi=0 tei=66 nr=2 *Mar 1 03:06:05.888: ISDN BR0: TX -> RRp sapi=0 tei=66 nr=1 *Mar 1 03:06:05.892: BRI: write_sid: scp = 0, wrote = E *Mar 1 03:06:05.912: ISDN BR0: RX <- RRf sapi=0 tei=66 nr=2 *Mar 1 03:06:15.920: ISDN BR0: TX -> RRp sapi=0 tei=66 nr=1 *Mar 1 03:06:15.924: BRI: write_sid: scp = 0, wrote = E *Mar 1 03:06:15.944: ISDN BR0: RX <- RRf sapi=0 tei=66 nr=2 *Mar 1 03:06:17.024: BR0:1 DDR: idle timeout *Mar 1 03:06:17.028: BR0:1 DDR: disconnecting call *Mar 1 03:06:17.028: ISDN BR0: Event: Hangup call to call id 0x31 *Mar 1 03:06:17.032: BRI: disable channel B1 *Mar 1 03:06:17.032: ISDN BR0: process_disconnect(): call id 0x31, call type is DATA, b_idb 0x230B74, ces 1, cause Normal call clearing(0x10) *Mar 1 03:06:17.040: %ISDN-6-DISCONNECT: Interface BRI0:1 disconnected from 27208196 krimson, call lasted 122 seconds *Mar 1 03:06:17.048: ISDN: get_isdn_service_state(): idb 0x230B74 bchan 2 is_isdn 1 Not a Pri *Mar 1 03:06:17.052: CCBRI_Go Fr Host InPkgInfo (Len=13) : *Mar 1 03:06:17.052: 5 0 1 0 31 3 8 1 90 8 2 80 90 *Mar 1 03:06:17.056: *Mar 1 03:06:17.072: ISDN BR0: TX -> INFOc sapi=0 tei=66 ns=2 nr=1 i=0x08019C4508028090 *Mar 1 03:06:17.084: DISCONNECT pd = 8 callref = 0x9C *Mar 1 03:06:17.088: Cause i = 0x8090 - Normal call clearing *Mar 1 03:06:17.096: BRI: write_sid: scp = 0, wrote = E *Mar 1 03:06:17.124: ISDN BR0: RX <- RRr sapi=0 tei=66 nr=3 *Mar 1 03:06:17.556: ISDN BR0: RX <- INFOc sapi=0 tei=66 ns=1 nr=3 i=0x08011C4D *Mar 1 03:06:17.564: RELEASE pd = 8 callref = 0x1C *Mar 1 03:06:17.580: CCBRI_Go Fr L3 pkt (Len=4) : *Mar 1 03:06:17.584: 4D 1 9C 97 *Mar 1 03:06:17.584: *Mar 1 03:06:17.592: ISDN BR0: LIF_EVENT: ces/callid 1/0x31 HOST_DISCONNECT_ACK *Mar 1 03:06:17.596: ISDN: get_isdn_service_state(): idb 0x230B74 bchan 2 is_isdn 1 Not a Pri *Mar 1 03:06:17.600: ISDN BR0: HOST_DISCONNECT_ACK: call type is DATA *Mar 1 03:06:17.604: BRI: disable channel B1 *Mar 1 03:06:17.604: %LINK-3-UPDOWN: Interface BRI0:1, changed state to down *Mar 1 03:06:17.612: BR0:1 DDR: disconnecting call *Mar 1 03:06:17.616: ISDN BR0: LIF_EVENT: ces/callid 1/0x31 HOST_DISCONNECT_ACK *Mar 1 03:06:17.620: ISDN: get_isdn_service_state(): idb 0x230B74 bchan 2 is_isdn 1 Not a Pri *Mar 1 03:06:17.624: ISDN BR0: HOST_DISCONNECT_ACK: call type is DATA *Mar 1 03:06:17.628: BRI: disable channel B1 *Mar 1 03:06:17.636: ISDN BR0: TX -> RRr sapi=0 tei=66 nr=2 *Mar 1 03:06:17.640: BRI: write_sid: scp = 0, wrote = E *Mar 1 03:06:17.644: ISDN BR0: TX -> INFOc sapi=0 tei=66 ns=3 nr=2 i=0x08019C5A *Mar 1 03:06:17.652: RELEASE_COMP pd = 8 callref = 0x9C *Mar 1 03:06:17.660: BRI: write_sid: scp = 0, wrote = E *Mar 1 03:06:17.684: ISDN BR0: RX <- RRr sapi=0 tei=66 nr=4 *Mar 1 03:06:18.940: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1, changed state to down *Mar 1 03:06:27.693: ISDN BR0: TX -> RRp sapi=0 tei=66 nr=2 *Mar 1 03:06:27.697: BRI: write_sid: scp = 0, wrote = E *Mar 1 03:06:27.717: ISDN BR0: RX <- RRf sapi=0 tei=66 nr=4 *Mar 1 03:06:32.781: ISDN BR0: RX <- DISCp c/r=1 sapi=0 tei=66 *Mar 1 03:06:32.785: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BR0, TEI 66 changed to down *Mar 1 03:06:32.793: ISDN BR0: TX -> UAf c/r=1 sapi=0 tei=66 *Mar 1 03:06:32.797: BRI: write_sid: scp = 0, wrote = E
kevin#show isdn status Global ISDN Switchtype = basic-net3 ISDN BRI0 interface dsl 0, interface ISDN Switchtype = basic-net3 Layer 1 Status: ACTIVE Layer 2 Status: TEI = 66, Ces = 1, SAPI = 0, State = TEI_ASSIGNED !--- ISDN Layer 2 is disconnected I_Queue_Len 0, UI_Queue_Len 0 Layer 3 Status: 0 Active Layer 3 Call(s) Active dsl 0 CCBs = 0 The Free Channel Mask: 0x3 Number of L2 Discards = 0, L2 Session ID = 10 Total Allocated ISDN CCBs = 0
kevin# *Mar 1 03:06:42.881: BRI: write_sid: scp = 0, wrote = 92 *Mar 1 03:06:42.885: BRI: write_sid: scp = 90, wrote = 93 *Mar 1 03:06:42.885: BRI0: ACTIVATED, state F2, event DI *Mar 1 03:06:42.889: BRI: T4 timer started DEACT timer expired *Mar 1 03:06:43.493: BRI: write_sid: scp = 0, wrote = 92 *Mar 1 03:06:43.493: BRI: write_sid: scp = 90, wrote = 93 *Mar 1 03:06:43.497: BRI: write_sid: scp = 0, wrote = 1 *Mar 1 03:06:43.497: BRI: write_sid: scp = 0, wrote = 0 *Mar 1 03:06:43.501: ISDN BR0 EVENT: isdn_sw_cstate: State = 0, Old State = 4 *Mar 1 03:06:43.505: BRI: disable channel B1 *Mar 1 03:06:43.505: BRI: disable channel B2 *Mar 1 03:06:43.509: ISDN BR0: Physical layer is IF_DOWN !--- ISDN Layer 1 deactivated due to no calls on BRI *Mar 1 03:06:43.509: ISDN BR0: Shutting down ME *Mar 1 03:06:43.513: ISDN BR0: Shutting down ISDN Layer 3
kevin#show isdn status Global ISDN Switchtype = basic-net3 ISDN BRI0 interface dsl 0, interface ISDN Switchtype = basic-net3 Layer 1 Status: DEACTIVATED Layer 2 Status: TEI = 66, Ces = 1, SAPI = 0, State = TEI_ASSIGNED !--- TEI is preserved due to used configuration I_Queue_Len 0, UI_Queue_Len 0 Layer 3 Status: 0 Active Layer 3 Call(s) Active dsl 0 CCBs = 0 The Free Channel Mask: 0x3 Number of L2 Discards = 0, L2 Session ID = 11 Total Allocated ISDN CCBs = 0
Revisão | Data de publicação | Comentários |
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1.0 |
09-Sep-2005 |
Versão inicial |