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Asynchronous connections Questa configurazione di esempio e' stata testata su un Cisco serie 2500 con multiseriale asincrona. Alle seriali erano collegati dei tradizionali modem analogici 56kbps o 33600bps. L'utente remoto si autentifica ed ottiene accesso ad internet (se il 2500 e' collegato ad Internet naturalmente). Ricordarsi di personalizzare la configurazione con: nomi utente e password; pool di indirizzi da assegnare; name server dns Il mittente dovra' configurazione la propria connessione di accesso remoto con protocollo ppp e autenticazione pap ...snip... username prova password 7 02140D570709 username pippo password 7 03560B5B5E5A73 username pluto password 7 1108150316425B ...snip... interface Async1 ip unnumbered Ethernet0 ip tcp header-compression passive encapsulation ppp async mode dedicated peer default ip address pool default ppp authentication pap ! interface Async2 ip unnumbered Ethernet0 ip tcp header-compression passive encapsulation ppp async mode dedicated peer default ip address pool default ppp authentication pap ...snip... line 1 8 no exec exec-timeout 0 0 login local modem InOut autocommand ppp negotiate transport input all stopbits 1 rxspeed 115200 txspeed 115200 flowcontrol hardware modem autoconfigure discovery ...snip... ip local pool default 192.168.50.64 192.168.50.92 ip name-server 192.168.90.111 ip name-server 192.168.90.112 ip route 0.0.0.0 0.0.0.0 INTERNETGATEWAY Per fare troubleshooting di una connessione si possono attivare i seguenti debug: debug modem debug ppp authent debug ppp negotiat ed ecco cosa accade per un tentativo di connessione a buon fine: TTY1: DSR came up tty1: Modem: IDLE->READY PPP Async1: dropping packet. Lower layer not up %LINK-3-UPDOWN: Interface Async1, changed state to up PPP Async1: treating connection as a dedicated line ppp: sending CONFREQ, type = 2 (CI_ASYNCMAP), value = 0xA0000 ppp: sending CONFREQ, type = 3 (CI_AUTHTYPE), value = 0xC023 ppp: sending CONFREQ, type = 5 (CI_MAGICNUMBER), value = 0xE526BCEF PPP Async1: state = REQsent fsm_rconfack(0xC021): rcvd id 46 ppp: config ACK received, type = 2 (CI_ASYNCMAP), value = 0xA0000 ppp: config ACK received, type = 3 (CI_AUTHTYPE), value = 0xC023 ppp: config ACK received, type = 5 (CI_MAGICNUMBER), value = 0xE526BCEF ppp: config ACK received, type = 7 (CI_PCOMPRESSION) ppp: config ACK received, type = 8 (CI_ACCOMPRESSION) ppp: sending CONFREQ, type = 2 (CI_ASYNCMAP), value = 0xA0000 ppp: sending CONFREQ, type = 3 (CI_AUTHTYPE), value = 0xC023 ppp: sending CONFREQ, type = 5 (CI_MAGICNUMBER), value = 0xE526BCEF PPP Async1: state = REQsent fsm_rconfack(0xC021): rcvd id 47 ppp: config ACK received, type = 2 (CI_ASYNCMAP), value = 0xA0000 ppp: config ACK received, type = 3 (CI_AUTHTYPE), value = 0xC023 ppp: config ACK received, type = 5 (CI_MAGICNUMBER), value = 0xE526BCEF ppp: config ACK received, type = 7 (CI_PCOMPRESSION) ppp: config ACK received, type = 8 (CI_ACCOMPRESSION) PPP Async1: received config for type = 2 (ASYNCMAP) value = 0x0 acked PPP Async1: received config for type = 5 (MAGICNUMBER) value = 0x126C6D13 acked PPP Async1: received config for type = 7 (PCOMPRESSION) acked PPP Async1: received config for type = 8 (ACCOMPRESSION) acked PPP Async1: received config for type = 13 (CALLBACK) rejected PPP Async1: received config for type = 17 (MULTILINK_MRRU) rejected PPP Async1: received config for type = 19 (ENDPOINT_DISC) rejected PPP Async1: received config for type = 2 (ASYNCMAP) value = 0x0 acked PPP Async1: received config for type = 5 (MAGICNUMBER) value = 0x126C6D13 acked PPP Async1: received config for type = 7 (PCOMPRESSION) acked PPP Async1: received config for type = 8 (ACCOMPRESSION) acked PPP Async1: PAP authenticating peer mario PPP Async1: Remote passed PAP authentication sending Auth-Ack. ipcp: sending CONFREQ, type = 2 (CI_COMPRESSTYPE), slots = 15, csid = 0 ipcp: sending CONFREQ, type = 3 (CI_ADDRESS), Address = 195.223.209.2 ppp Async1: ipcp_reqci: rcvd COMPRESSTYPE (ACK) ppp Async1: Negotiate IP address: her address 0.0.0.0 ppp: Async1: using pool 'default' ppp: Async1: pool returned 192.168.50.64 (NAK with address 192.168.50.64) (NAK) ppp Async1: Negotiate Primary DNS address: her address 0.0.0.0 (NAK with address 192.168.90.112) (NAK) ppp Async1: Negotiate Primary NBNS address: her address 0.0.0.0 ppp Async1: Primary NBNS address unknown (REJ) ppp Async1: Negotiate Secondary DNS address: her address 0.0.0.0 (NAK with address 192.168.90.111) (NAK) ppp Async1: Negotiate Secondary NBNS address: her address 0.0.0.0 ppp Async1: Secondary NBNS address unknown (REJ) ppp: ipcp_reqci: returning CONFREJ. PPP Async1: state = REQsent fsm_rconfack(0x8021): rcvd id 1 ipcp: config ACK received, type = 2 (CI_COMPRESSTYPE), slots = 15, csid = 0 ipcp: config ACK received, type = 3 (CI_ADDRESS), Address = 195.223.209.2 ppp Async1: ipcp_reqci: rcvd COMPRESSTYPE (ACK) ppp Async1: Negotiate IP address: her address 0.0.0.0 (NAK with address 192.168.50.64) (NAK) ppp Async1: Negotiate Primary DNS address: her address 0.0.0.0 (NAK with address 192.168.90.112) (NAK) ppp Async1: Negotiate Secondary DNS address: her address 0.0.0.0 (NAK with address 192.168.90.111) (NAK) ppp: ipcp_reqci: returning CONFNAK. %LINEPROTO-5-UPDOWN: Line protocol on Interface Async1, changed state to up ppp Async1: ipcp_reqci: rcvd COMPRESSTYPE (ACK) ppp Async1: Negotiate IP address: her address 192.168.50.64 (ACK) ppp Async1: Negotiate Primary DNS address: her address 192.168.90.112 (ACK) ppp Async1: Negotiate Secondary DNS address: her address 192.168.90.111 (ACK) ppp: ipcp_reqci: returning CONFACK. Async1: install route to 192.168.50.64 A questo punto siamo autenticati e ci sconnettiamo: Async1: remove route to 192.168.50.64 %LINEPROTO-5-UPDOWN: Line protocol on Interface Async1, changed state to down TTY1: DSR was dropped tty1: Modem: READY->HANGUP TTY1: dropping DTR, hanging up TTY1: Async Int reset: Dropping DTR tty1: Modem: HANGUP->IDLE TTY1: cleanup pending. Delaying DTR %LINK-5-CHANGED: Interface Async1, changed state to reset TTY1: cleanup pending. Delaying DTR TTY1: cleanup pending. Delaying DTR TTY1: cleanup pending. Delaying DTR TTY1: cleanup pending. Delaying DTR Async1: allowing modem_process to continue hangup TTY1: restoring DTR %LINK-3-UPDOWN: Interface Async1, changed state to down ultima revisione Agosto 2004 Altre letture Consiglio di consultare l’enorme documentazione disponibile on-line nel sito della cisco http://www.cisco.com/. E’ possibile trovare sempre tutto cio’ che si cerca.
	*Copyright 2004 – Gianrico Fichera –* Il materiale di questa pagina non e’ sponsorizzato o sottoscritto da Cisco Systems, Inc. Ciscoâ e’ un trademark di Cisco Systems, Inc. negli Stati Uniti e in altri stati. L’autore di questa pagina non si assume nessuna responsabilita’ e non da nessuna garanzia riguardante l’accuratezza e la completezza delle informazioni presenti nonche’ da conseguenze sull’uso delle informazioni presenti in questa pagina. Il sito web ufficiale della Cisco e’ http://www.cisco.com. Nel caso si volesse utilizzare il contenuto di questa pagina nella forma in cui e’ presentato rivolgersi all’autore scrivendo a gianrico.fichera itesys.it. E' possibile utilizzare il contenuto di questa pagina per fini didattici (non lucro) purche' si dia credito all'autore.	This material is not sponsored by, endorsed by, or affiliated with Cisco Systems, Inc., Cisco, Cisco Systems, and the Cisco Systems logo are trademarks or registered trade marks of Cisco Systems, Inc. or its affiliates. All other trademarks are trademarks of their respective owners.

   Questa configurazione di esempio e' stata testata su un Cisco serie 2500 con multiseriale asincrona.
Alle seriali erano collegati dei tradizionali modem analogici 56kbps o 33600bps. L'utente remoto si 
autentifica ed ottiene accesso ad internet (se il 2500 e' collegato ad Internet naturalmente). Ricordarsi
di personalizzare la configurazione con:

ed ecco cosa accade per un tentativo di connessione a buon fine:

TTY1: DSR came up
tty1: Modem: IDLE->READY
PPP Async1: dropping packet. Lower layer not up
%LINK-3-UPDOWN: Interface Async1, changed state to up
PPP Async1: treating connection as a dedicated line
ppp: sending CONFREQ, type = 2 (CI_ASYNCMAP), value = 0xA0000
ppp: sending CONFREQ, type = 3 (CI_AUTHTYPE), value = 0xC023
ppp: sending CONFREQ, type = 5 (CI_MAGICNUMBER), value = 0xE526BCEF
PPP Async1: state = REQsent fsm_rconfack(0xC021): rcvd id 46
ppp: config ACK received, type = 2 (CI_ASYNCMAP), value = 0xA0000
ppp: config ACK received, type = 3 (CI_AUTHTYPE), value = 0xC023
ppp: config ACK received, type = 5 (CI_MAGICNUMBER), value = 0xE526BCEF
ppp: config ACK received, type = 7 (CI_PCOMPRESSION)
ppp: config ACK received, type = 8 (CI_ACCOMPRESSION)
ppp: sending CONFREQ, type = 2 (CI_ASYNCMAP), value = 0xA0000
ppp: sending CONFREQ, type = 3 (CI_AUTHTYPE), value = 0xC023
ppp: sending CONFREQ, type = 5 (CI_MAGICNUMBER), value = 0xE526BCEF
PPP Async1: state = REQsent fsm_rconfack(0xC021): rcvd id 47
ppp: config ACK received, type = 2 (CI_ASYNCMAP), value = 0xA0000
ppp: config ACK received, type = 3 (CI_AUTHTYPE), value = 0xC023
ppp: config ACK received, type = 5 (CI_MAGICNUMBER), value = 0xE526BCEF
ppp: config ACK received, type = 7 (CI_PCOMPRESSION)
ppp: config ACK received, type = 8 (CI_ACCOMPRESSION)
PPP Async1: received config for type = 2 (ASYNCMAP) value = 0x0 acked
PPP Async1: received config for type = 5 (MAGICNUMBER) value = 0x126C6D13 acked
PPP Async1: received config for type = 7 (PCOMPRESSION) acked
PPP Async1: received config for type = 8 (ACCOMPRESSION) acked
PPP Async1: received config for type = 13 (CALLBACK) rejected
PPP Async1: received config for type = 17 (MULTILINK_MRRU) rejected
PPP Async1: received config for type = 19 (ENDPOINT_DISC) rejected
PPP Async1: received config for type = 2 (ASYNCMAP) value = 0x0 acked
PPP Async1: received config for type = 5 (MAGICNUMBER) value = 0x126C6D13 acked
PPP Async1: received config for type = 7 (PCOMPRESSION) acked
PPP Async1: received config for type = 8 (ACCOMPRESSION) acked
PPP Async1: PAP authenticating peer mario
PPP Async1: Remote passed PAP authentication sending Auth-Ack.
ipcp: sending CONFREQ, type = 2 (CI_COMPRESSTYPE), slots = 15, csid = 0
ipcp: sending CONFREQ, type = 3 (CI_ADDRESS), Address = 195.223.209.2
ppp Async1: ipcp_reqci: rcvd COMPRESSTYPE (ACK)
ppp Async1: Negotiate IP address: her address 0.0.0.0
ppp: Async1: using pool 'default'
ppp: Async1: pool returned 192.168.50.64 (NAK with address 192.168.50.64) (NAK)
ppp Async1: Negotiate Primary DNS address: her address 0.0.0.0 (NAK with address 192.168.90.112) (NAK)
ppp Async1: Negotiate Primary NBNS address: her address 0.0.0.0
ppp Async1: Primary NBNS address unknown (REJ)
ppp Async1: Negotiate Secondary DNS address: her address 0.0.0.0 (NAK with address 192.168.90.111) (NAK)
ppp Async1: Negotiate Secondary NBNS address: her address 0.0.0.0
ppp Async1: Secondary NBNS address unknown (REJ)
ppp: ipcp_reqci: returning CONFREJ.
PPP Async1: state = REQsent fsm_rconfack(0x8021): rcvd id 1
ipcp: config ACK received, type = 2 (CI_COMPRESSTYPE), slots = 15, csid = 0
ipcp: config ACK received, type = 3 (CI_ADDRESS), Address = 195.223.209.2
ppp Async1: ipcp_reqci: rcvd COMPRESSTYPE (ACK)
ppp Async1: Negotiate IP address: her address 0.0.0.0 (NAK with address 192.168.50.64) (NAK)
ppp Async1: Negotiate Primary DNS address: her address 0.0.0.0 (NAK with address 192.168.90.112) (NAK)
ppp Async1: Negotiate Secondary DNS address: her address 0.0.0.0 (NAK with address 192.168.90.111) (NAK)
ppp: ipcp_reqci: returning CONFNAK.
%LINEPROTO-5-UPDOWN: Line protocol on Interface Async1, changed state to up
ppp Async1: ipcp_reqci: rcvd COMPRESSTYPE (ACK)
ppp Async1: Negotiate IP address: her address 192.168.50.64 (ACK)
ppp Async1: Negotiate Primary DNS address: her address 192.168.90.112 (ACK)
ppp Async1: Negotiate Secondary DNS address: her address 192.168.90.111 (ACK)
ppp: ipcp_reqci: returning CONFACK.
Async1: install route to 192.168.50.64

Async1: remove route to 192.168.50.64
%LINEPROTO-5-UPDOWN: Line protocol on Interface Async1, changed state to down
TTY1: DSR was dropped
tty1: Modem: READY->HANGUP
TTY1: dropping DTR, hanging up
TTY1: Async Int reset: Dropping DTR
tty1: Modem: HANGUP->IDLE
TTY1: cleanup pending. Delaying DTR
%LINK-5-CHANGED: Interface Async1, changed state to reset
TTY1: cleanup pending. Delaying DTR
TTY1: cleanup pending. Delaying DTR
TTY1: cleanup pending. Delaying DTR
TTY1: cleanup pending. Delaying DTR
Async1: allowing modem_process to continue hangup
TTY1: restoring DTR
%LINK-3-UPDOWN: Interface Async1, changed state to down

Consiglio di consultare l’enorme documentazione disponibile on-line nel sito della cisco http://www.cisco.com/. E’ possibile trovare sempre tutto cio’ che si cerca.