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Inviato: **mer 10 mar , 2010 10:12 pm**

ciao a tutti,
ho bisogno del vostro aiuto per la configurazione del router cisco877 nell'ufficio di mio cugino.
Premetto che nell'ufficio adesso è presente un router netgear DG834 con la seguente configurazione fornita da telecom:
ip statico 217.56.xxx.121
gateway 217.56.xxx.122
dns 151.99.125.1 e 151.99.125.2
PPPoA con encapsulation LLC e pvc8/35

premetto che sono alle prime armi......

questa è la configurazione che ho inserito:
****************
sh run
Building configuration...

Current configuration : 1363 bytes
!
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname cisco
!
boot-start-marker
boot-end-marker
!
logging message-counter syslog
!
no aaa new-model
!
!
dot11 syslog
ip source-route
!
!
!
!
ip cef
no ip domain lookup
no ipv6 cef
!
multilink bundle-name authenticated
!
!
!
username cisco privilege 15 secret 5 $1$xKHj$W79d19xykabYcvHSeEhSJ.
!
!
!
archive
log config
hidekeys
!
!
!
!
!
interface ATM0
no ip address
no atm ilmi-keepalive
pvc 8/35
encapsulation aal5mux ppp dialer
dialer pool-member 1
!
!
interface FastEthernet0
!
interface FastEthernet1
!
interface FastEthernet2
!
interface FastEthernet3
!
interface Vlan1
ip address 192.168.168.1 255.255.255.0
ip nat inside
ip virtual-reassembly
!
interface Dialer0
description Connessione Internet
ip address 217.56.xxx.xxx 255.255.255.248
ip nat outside
ip virtual-reassembly
encapsulation ppp
dialer pool 1
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 Dialer0
ip http server
ip http authentication local
no ip http secure-server
!
!
ip nat inside source list 1 interface Dialer0 overload
!
access-list 1 permit 192.168.168.0 0.0.0.255
!
!
!
!
!
control-plane
!
!
line con 0
password console
login
no modem enable
line aux 0
line vty 0 4
login
!
scheduler max-task-time 5000
end
*************************

quando collego il router vedo che la luce 'CD' rimane fissa mentre le luci RXD e TXD lampenggiano ogni tanto e purtroppo la connessione ad internet non funziona

qualche suggerimento?
ad esempio devo utilizzare aal5mux oppure aal5snap?

grazie mille
ciao
gio

Inviato: **dom 21 mar , 2010 5:45 pm**

ciao,
con encapsulation LLC devi usare aal5snap.

Ma se fai show ip interface brief, all'interfaccia dialer0 viene assegnato un ip?

Inviato: **lun 22 mar , 2010 3:39 pm**

ciao jullare81,
grazie dell'info infatti studiando un pochino di più l'atm avevo dedotto che aal5mux non andava bene

. In ogni caso sono riuscito a risolvere il problema eliminando il dialer0 e creando una configurazione punto punto
Questa è la configurazione :

Codice: Seleziona tutto

*******************************
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname cisco
!
boot-start-marker
boot-end-marker
!
logging message-counter syslog
enable password prova
!
no aaa new-model
!
crypto pki trustpoint TP-self-signed-907947380
 enrollment selfsigned
 subject-name cn=IOS-Self-Signed-Certificate-907947380
 revocation-check none
 rsakeypair TP-self-signed-907947380
!
!
crypto pki certificate chain TP-self-signed-907947380
 certificate self-signed 01
  30820242 308201AB A0030201 02020101 300D0609 2A864886 F70D0101 04050030 
  30312E30 2C060355 04031325 494F532D 53656C66 2D536967 6E65642D 43657274 
  69666963 6174652D 39303739 34373338 30301E17 0D303930 38323230 32333130 
  395A170D 32303031 30313030 30303030 5A303031 2E302C06 03550403 1325494F 
  532D5365 6C662D53 69676E65 642D4365 72746966 69636174 652D3930 37393437 
  33383030 819F300D 06092A86 4886F70D 01010105 0003818D 00308189 02818100 
  E94C0824 765C64CB 02A1F09F 19C304D3 178DB018 970F246B EB5759CB 48D4203C 
  223C41D6 27B9D7B4 7FE6E31D C3E72080 45FC9899 0CD1F4E7 4F4C2366 3CE223BE 
  83B1CCD5 C8868AC7 DCE72BB0 17E6D4D6 A42626CE CA49C80C BEA8BE57 8688A8B1 
  E89A1E1D CD3A7B13 A2CA1891 43B2EF8E 2FC01AFD 0C9C92E1 F2DE5CC5 7B98444D 
  02030100 01A36C30 6A300F06 03551D13 0101FF04 05300301 01FF3017 0603551D 
  11041030 0E820C63 6973636F 2E6D792E 6C616230 1F060355 1D230418 30168014 
  96835EB9 18554C00 83FE2885 643396C3 E311B713 301D0603 551D0E04 16041496 
  835EB918 554C0083 FE288564 3396C3E3 11B71330 0D06092A 864886F7 0D010104 
  05000381 8100B172 7FF27D85 E0C83775 9F272A1C E6A11070 1B47BBFD D5C0561B 
  B119649A 11761B8B 81D6C437 D33EE3B3 56BC2EC7 749F764C 7C89AA52 2520A0C2 
  5633A439 D915A853 22B52699 54AAB92B B4D6EC84 1CF5ED2B C10FFF90 38E82E05 
  8F4BC95E 8F2EF676 06B7F684 048FE0D1 A617CE18 42CC1C52 89301DEA C054088E 
  461913AB 4EF3
  	quit
dot11 syslog
ip source-route
!
!
!
!
ip cef
ip domain name my.lab
no ipv6 cef
!
multilink bundle-name authenticated
!
!
!
username cisco privilege 15 secret 5 $1$NdH9$BKjDE9zPE/eIcqOIxFCds/
username ciscossh password 0 cisco
! 
!
!
archive
 log config
 hidekeys
!
!
ip ssh version 2
!
!
!
interface ATM0
 no ip address
 no atm ilmi-keepalive
 hold-queue 224 in
!
interface ATM0.1 point-to-point
 ip address 217.x.x.121 255.255.255.248
 ip nat outside
 ip virtual-reassembly
 pvc 8/35 
  oam-pvc manage
  encapsulation aal5snap
 !
!
interface FastEthernet0
!
interface FastEthernet1
!
interface FastEthernet2
!
interface FastEthernet3
!
interface Vlan1
 ip address 192.168.168.1 255.255.255.0
 ip nat inside
 ip virtual-reassembly
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 ATM0.1
ip http server
ip http authentication local
ip http secure-server
ip http timeout-policy idle 600 life 86400 requests 10000
!
!
ip nat inside source list 1 interface ATM0.1 overload
!
access-list 1 permit 192.168.168.0 0.0.0.255
!
 --More--         !
!
!
!
control-plane
!
!
line con 0
 no modem enable
line aux 0
line vty 0 4
 login local
 transport input ssh
!
scheduler max-task-time 5000

***********************************

Quello che invece ho notato è che facendo show int atm0 e poi atm0.1 MTU è settato a 4470 bytes. Non dovrebbe essere settato a 1500?

Codice: Seleziona tutto

cisco#show int atm0
ATM0 is up, line protocol is up 
  Hardware is MPC ATMSAR (with Alcatel ADSL Module)
  MTU 4470 bytes, sub MTU 4470, BW 608 Kbit/sec, DLY 600 usec, 
     reliability 255/255, txload 1/255, rxload 6/255
  Encapsulation ATM, loopback not set
  Encapsulation(s): AAL5  AAL2, PVC mode
  10 maximum active VCs, 1024 VCs per VP, 1 current VCCs
  VC Auto Creation Disabled.
  VC idle disconnect time: 300 seconds
  Last input 00:00:00, output 00:00:00, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/224/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: Per VC Queueing
  5 minute input rate 15000 bits/sec, 3 packets/sec
  5 minute output rate 3000 bits/sec, 2 packets/sec
     3856 packets input, 2620969 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 7 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     3765 packets output, 644299 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 unknown protocol drops
     0 output buffer failures, 0 output buffers swapped out
cisco#show int atm0.1
ATM0.1 is up, line protocol is up 
  Hardware is MPC ATMSAR (with Alcatel ADSL Module)
  Internet address is 217.x.x.121/29
  MTU 4470 bytes, BW 608 Kbit/sec, DLY 600 usec, 
     reliability 255/255, txload 1/255, rxload 6/255
  Encapsulation ATM
     3872 packets input, 2639773 bytes
     3706 packets output, 641638 bytes 
     73 OAM cells input, 73 OAM cells output
  AAL5 CRC errors : 0
  AAL5 SAR Timeouts : 0
  AAL5 Oversized SDUs : 0
  Last clearing of "show interface" counters never

ciao
gio71

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