
  allora avevo abbandonato l'idea dei due router e in realtà mi ero anche arenato. Adesso utilizzo un 1720 che serve a far navigare i computer in internet e dalla WIC 1Enet vado al 1751V che dovrebbe fare da centralino (spero di riuscirci, prima o poi) ed ecco le configurazioni:
Cisco 1720.  
clock timezone CET 1
clock summer-time CEST recurring last Sun Mar 2:00 last Sun Oct 3:00
mmi polling-interval 60
no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180
no aaa new-model
ip subnet-zero
no ip source-route
!
!
!
ip dhcp pool Via_Agnone_43
   network 172.31.43.0 255.255.255.0
   default-router 172.31.43.254 
   dns-server 151.99.125.1 151.99.0.100 
!
ip dhcp pool Voip_Cisco_1751-V
   network 172.30.43.0 255.255.255.0
   dns-server 151.99.125.1 151.99.0.100 
   default-router 172.30.43.254 
!
ip cef
ip audit po max-events 100
!
!
username lucaspag 
!
! 
!
!
!
interface ATM0
 no ip address
 no ip mroute-cache
 no atm ilmi-keepalive
 dsl operating-mode auto
 pvc 8/35 
  encapsulation aal5snap
  protocol ppp dialer
  dialer pool-member 1
 !
!
interface Ethernet0
 description Lan Eutelia Voip
 ip address 172.30.43.254 255.255.255.0
 ip nat inside
 half-duplex
!
interface FastEthernet0
 description rete internet
 ip address 172.31.43.254 255.255.255.0
 no ip proxy-arp
 ip nat inside
 speed auto
!
interface Dialer0
 ip address negotiated
 ip nat outside
 encapsulation ppp
 dialer pool 1
 dialer-group 1
 ppp pap sent-username xxxxxxxxxx@xxxxxxxxxxxx password 7 xxxxxxxxxxxxxx
!
ip nat inside source list 101 interface Dialer0 overload
ip nat inside source list 102 interface Dialer0 overload
ip nat inside source list 103 interface Dialer0 overload
ip nat inside source static tcp 172.31.43.13 8080 xx.xx.xx.xxx 8080 extendable
ip classless
ip route 0.0.0.0 0.0.0.0 Dialer0
no ip http server
no ip http secure-server
!
!
!
map-class dialer DialClass
access-list 101 permit ip 172.31.43.0 0.0.0.255 any
access-list 102 permit ip 172.30.43.0 0.0.0.255 any
access-list 103 permit ip 172.16.43.0 0.0.0.255 any
dialer-list 1 protocol ip permit
!
snmp-server community public RO
!
line con 0
 exec-timeout 120 0
line aux 0
line vty 0 4
 login local
!
sntp server 193.204.114.232
end
Ed ecco il 1751V
hostname Super4Mega-EuteliaVoip
!
boot-start-marker
boot-end-marker
!
enable password 7 030D5F0A
!
no aaa new-model
clock timezone CET 1
clock summer-time CEST recurring last Sun Mar 2:00 last Sun Oct 3:00
voice-card 1
!
voice-card 2
!
ip cef
!
!
no ip dhcp use vrf connected
!
ip dhcp pool VOIP
   network 172.16.43.0 255.255.255.0
   default-router 172.16.43.254 
   dns-server 62.94.0.42 62.94.0.41 
   domain-name voip.eutelia.it
   option 150 ip 172.16.43.254 
!
!
ip vrf forwarding
!
multilink bundle-name authenticated
!
!
!
voice service voip 
 allow-connections h323 to h323
 allow-connections h323 to sip
 allow-connections sip to h323
 allow-connections sip to sip
 sip
!
!
voice class codec 1
 codec preference 1 g711alaw
 codec preference 2 g711ulaw
 codec preference 3 g729r8
!
!
!
!
!
!
voice class custom-cptone 1
!
!
!
voice register global
 mode cme
 source-address 172.16.43.254 port 5060
 max-dn 10
 max-pool 20
!
voice register dn  1
 number 204
 allow watch
 name Studio
 label Studio
!
voice register dn  2
 number 205
 allow watch
 name Salotto
 label Salotto
!
voice register pool  1
 id mac 001B.D45F.E2A0
 number 1 dn 1
 codec g711ulaw
 blf-speed-dial 1 0242101200# label "Trasferimento_di_Chiamata"
 blf-speed-dial 2 4050# label "Credito_Eutelia_Voip"
!
voice register pool  2
 id mac 001E.136C.4F53
 number 2 dn 2
 codec g711ulaw
!
!
!
!
!
!
!
username lucaspag password 7 08245E400C0A1118
archive
 log config
  hidekeys
!
!
!
class-map match-any voice-signaling
!
!
!         
!
!
interface FastEthernet0/0
 description Eutelia Voip
 ip address dhcp
 ip nat inside
 ip virtual-reassembly
 no ip route-cache cef
 no ip route-cache
 no ip mroute-cache
 speed auto
 hold-queue 100 out
!
interface FastEthernet0/1
 description Siemens C450 IP Messagnet xxxxxxxxxxx
!
interface FastEthernet0/2
 description Cisco IP Phone 7941 Salotto
!
interface FastEthernet0/3
 description Cisco IP Phone 7970 Studio
!
interface FastEthernet0/4
!
interface Vlan1
 ip address 172.16.43.254 255.255.255.0
 ip nat inside
 ip virtual-reassembly
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 FastEthernet0/0
!
no ip http server
no ip http secure-server
ip nat inside source list 103 interface FastEthernet0/0 overload
!
access-list 103 permit ip 172.16.43.0 0.0.0.255 any
tftp-server flash:term41.default.loads
tftp-server flash:term61.default.loads
tftp-server flash:apps41.8-2-2ES1.sbn
tftp-server flash:cnu41.8-2-2ES1.sbn
tftp-server flash:SCCP41.8-2-2SR1S.loads
tftp-server flash:cvm41sccp.8-2-2ES1.sbn
tftp-server flash:jar41sccp.8-2-2ES1.sbn
tftp-server flash:dsp41.8-2-2ES1.sbn
tftp-server flash:/it-mk-sccp.jar alias Italian_Italy/mk-sccp.jar
tftp-server flash:/g3-tones.xml alias Italy/g3-tones.xml
tftp-server flash:apps70.8-2-2ES1.sbn
tftp-server flash:cnu70.8-2-2ES1.sbn
tftp-server flash:cvm70sccp.8-2-2ES1.sbn
tftp-server flash:dsp70.8-2-2ES1.sbn
tftp-server flash:jar70sccp.8-2-2ES1.sbn
tftp-server flash:SCCP70.8-2-2SR1S.loads
tftp-server flash:term70.default.loads
tftp-server flash:term71.default.loads
tftp-server flash:it-td-sccp.jar alias Italian_Italy/td-sccp.jar
control-plane host
!
!
control-plane
!
!
!
voice-port 1/0
 echo-cancel coverage 32
 no vad
 playout-delay mode fixed
 cptone IT
 timeouts initial 120
 timeouts interdigit 3
 timeouts call-disconnect 0
 music-threshold -10
 bearer-cap Speech
 caller-id enable
!
voice-port 1/1
 echo-cancel coverage 32
 no vad
 playout-delay mode fixed
 timeouts initial 120
 timeouts interdigit 3
 timeouts call-disconnect 0
 bearer-cap Speech
 caller-id enable
!
!
!
!
!
!
dial-peer voice 1 pots
 answer-address xxxxxxxxxxxx
 destination-pattern xxxxxxxxxxx
 port 1/0
 authentication username xxxxxxxxxx password 7 1058001802191D05095079 realm voip.eutelia.it
 supported-language it
!
dial-peer voice 2 pots
 answer-address xxxxxxxxxxx
 destination-pattern xxxxxxxxxxx
 port 1/1
 authentication username xxxxxxxxxxx password 7 11050C0616011B0D037C7F realm voip.eutelia.it
 supported-language it
!
dial-peer voice 3 voip
 destination-pattern .T
 voice-class codec 1
 session protocol sipv2
 session target sip-server
 session transport udp
 incoming called-number .T
 dtmf-relay rtp-nte
 ip qos dscp cs5 media
 ip qos dscp cs5 signaling
!
sip-ua 
 authentication username xxxxxxxxxxxx password 7 1058001802191D05095079 realm voip.eutelia.it
 retry invite 4
 retry response 3
 retry bye 2
 retry cancel 2
 registrar ipv4:83.211.227.21:5060 expires 3600
 sip-server ipv4:83.211.227.21:5060
!
!
telephony-service
 video
  maximum bit-rate 256
 load 7941GE SCCP41.8-2-2SR1S.loads
 load 7970 SCCP70.8-2-2SR1S.loads
 max-ephones 5
 max-dn 10
 ip source-address 172.16.43.254 port 2000
 auto assign 1 to 5
 service phone displayIdleTimeout 00:10
 service phone daysDisplayNotActive 1,2,3,4,5,6,7
 service phone displayOnWhenIncomingCall 1
 system message xxxx xxxxxxxx
 time-zone 23
 time-format 24
 date-format dd-mm-yy
 max-conferences 2 gain -6
 dn-webedit 
 time-webedit 
 transfer-system full-consult
 transfer-pattern .T
 secondary-dialtone 9
 fac custom callfwd all 0*
!
!
ephone-template  1
 service phone daysDisplayNotActive 1,2,3,4,5,6,7
 service phone backlightIdleTimeout 00.10
 service phone displayOnWhenIncomingCall 1
!
!
ephone-dn  1  dual-line
 number xxxxxxxx288 no-reg primary
 label xxxxxxxxxx
!
!
ephone-dn  2  dual-line
 number xxxxxxxxxxx no-reg primary
!
!
ephone-dn  10  dual-line
 number xxxxxxxxxxx no-reg primary
 label Deviazione di Chiamata
 call-forward all xxxxxxxxxx
!
!
ephone  1
 description Cisco IP Phone 7970G Studio
 video
 mac-address 001B.D45F.E2A0
 ephone-template 1
 blf-speed-dial 1 0242101200# label "Trasferimento_di_Chiamata"
 blf-speed-dial 2 4050# label "Credito_Eutelia_Voip"
 type 7970
 auto-line 1
 button  1:1 2:2
!
!
!
ephone  2
 description Cisco IP Phone 7941G Salotto
 mac-address 001E.136C.4F53
 type 7941GE
 button  1:1
!
!
!
line con 0
line aux 0
line vty 0 4
 login local
!
sntp server 193.204.114.232
end
Il problema è che il secondo router non effettua le chiamate e pure collegando un pc ad una porta della Vlan non si naviga, la cosa che mi mette dei dubbi è il fatto che il sip-ua si registra!!! Potete aiutarmi???