Newsgroup: it.comp.reti.cisco
Titolo: cisco 1720 e adsl

ciao a tutti,
ho cercato di sbrogliarmela da solo ma....
sono alle prese con un cisco 1720 con wic adsl e non riesco a far 
funzionare il collegamento.
il router attiva la comunicazione, riceve l'ok dal dslam e qui qualcosa 
si bolcca. il router continua a spedire pacchetti atm ma non riceve 
risposta (questa la versione breve).
ecco qui qualche altra info:
#sh ver
Cisco Internetwork Operating System Software
IOS (tm) C1700 Software (C1700-Y7-M), Version 12.2(8)T5,  RELEASE 
SOFTWARE (fc1)
TAC Support: 
http://www.cisco.com/tac
Copyright (c) 1986-2002 by cisco Systems, Inc.
Compiled Thu 20-Jun-02 23:06 by ccai
Image text-base: 0x80008108, data-base: 0x808C4008
ROM: System Bootstrap, Version 12.0(3)T, RELEASE SOFTWARE (fc1)
uptime is 15 minutes
System returned to ROM by reload
System image file is "flash:c1700-y7-mz.122-8.T5.bin"
cisco 1720 (MPC860T) processor (revision 0x601) with 24576K/8192K bytes 
of memory.
Processor board ID JAD052406WA 
(2729275747
), with hardware revision 0000
MPC860T processor: part number 0, mask 32
Bridging software.
X.25 software, Version 3.0.0.
1 FastEthernet/IEEE 802.3 interface(s)
1 ATM network interface(s)
32K bytes of non-volatile configuration memory.
8192K bytes of processor board System flash (Read/Write)
Configuration register is 0x2102
#sh run
Building configuration...
Current configuration : 2483 bytes
!
version 12.2
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname cisco
!
aaa new-model
!
!
aaa authentication ppp default if-needed local
aaa session-id common
enable secret xxxxxxxxxx
!
username xxxxxxxxxxxx
memory-size iomem 25
mmi polling-interval 60
no mmi auto-configure
mmi pvc 8/35
mmi snmp-timeout 180
ip subnet-zero
!
!
interface ATM0
  no ip address
  no ip route-cache
  no atm ilmi-keepalive
  pvc 8/35
   encapsulation aal5mux ppp dialer 1
   dialer pool-member 1
  !
  dsl operating-mode auto
  no fair-queue
  hold-queue 224 in
!
interface FastEthernet0
  ip address 192.168.1.8 255.255.255.0
  ip nat inside
  no ip route-cache
  speed auto
!
interface Dialer0
  ip address negotiated
  ip mtu 1492
  ip nat outside
  encapsulation ppp
  dialer pool 1
  dialer-group 1
  ppp authentication pap callin
  ppp chap hostname xxxxxxxxx
  ppp chap password xxxxxxxxxxxx
  ppp pap sent-username xxxxxxxxxxxxx
!
ho pure provato a sostituire il dialer con (non so cosa ho fatto)
interface Virtual-Template1
  ip address negotiated
  ip mtu 1492
  ip nat outside
  ppp authentication chap pap callin
  ppp chap hostname xxxxxxxxxxxxxxxxx
  ppp chap password xxxxxxxxxxxxxxxxxxx
  ppp pap sent-username xxxxxxxxxxxxxxxxxx
!
dando un paio di comandi di debug su atm (#deb atm pa e #deb atm ev)
ottengo
........
00:01:00: DSL(ATM0): 7: Modem state = 0x10
00:01:03: DSL(ATM0): 8: Modem state = 0x10
00:01:05: DSL: Received response: 0x24
00:01:05: DSL: Showtime!
..............
00:01:17: ATM0 dslsar_1a_enable: restarting VCs: 0
00:01:17:  dslsar_1a_setup_vc(ATM0): vc:1 vpi:8 vci:35 state 2
00:01:17: ATM0 dslsar_vc_setup: vcd 1, vpi 8, vci 35, avgrate 0
00:01:17: CONFIGURING VC 1 (8/35) IN TX SCHEDULE TABLE SET 1
00:01:17: Forcing Peakrate and Avgrate to: 192
00:01:17: Requested QoS: Peakrate = 192, Avgrate = 192, Burstsize =0
00:01:17: Configuring VC 1:  slot 0 in TST 5
00:01:17: SUCCESSFUL CONFIGURATION OF  VC 1 (8/35), QOS Type 4
00:01:18: %LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0, changed 
state to up
00:01:19: %LINK-3-UPDOWN: Interface Virtual-Access1, changed state to up
00:01:19: ATM0(O):
che dovrebbe voler dire: "il collegamento atm e' ok"
ma poi vi sono solo pacchetti in output
.............
00:01:21: ATM0(O):
VCD:0x1 VPI:0x8 VCI:0x23 DM:0x0, MUXETYPE:0x0009 Length:0x10
00:01:21: C021 0102 000A 0506 0218 98A3
00:01:21:
00:01:23: ATM0(O):
VCD:0x1 VPI:0x8 VCI:0x23 DM:0x0, MUXETYPE:0x0009 Length:0x10
00:01:23: C021 0103 000A 0506 0218 98A3
00:01:23:
00:01:25: ATM0(O):
VCD:0x1 VPI:0x8 VCI:0x23 DM:0x0, MUXETYPE:0x0009 Length:0x10
00:01:25: C021 0104 000A 0506 0218 98A3
00:01:25:
00:01:27: ATM0(O):
VCD:0x1 VPI:0x8 VCI:0x23 DM:0x0, MUXETYPE:0x0009 Length:0x10
00:01:27: C021 0105 000A 0506 0218 98A3
............. ad infinitum........
se do il comando
sh int atm0
mi compare questo
ATM0 is down, line protocol is down
   Hardware is DSLSAR (with Alcatel ADSL Module)
   MTU 4470 bytes, sub MTU 4470, BW 192 Kbit, DLY 10660 usec,
      reliability 178/255, txload 1/255, rxload 1/255
   Encapsulation ATM, loopback not set
   Encapsulation(s): AAL5 AAL2, PVC mode
   23 maximum active VCs, 256 VCs per VP, 65535 current VCCs
   VC idle disconnect time: 300 seconds
   Last input never, output 00:12:52, 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: fifo
   Output queue :0/40 (size/max)
   5 minute input rate 0 bits/sec, 0 packets/sec
   5 minute output rate 0 bits/sec, 0 packets/sec
      0 packets input, 0 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
      121 packets output, 1667 bytes, 0 underruns
      0 output errors, 0 collisions, 2 interface resets
      0 output buffer failures, 0 output buffers swapped out
a parte il fatto che l'interfaccia adesso e' down perche' ho staccato il 
cavo, praticamente in input non riceve 'na mazza.
la linea funziona correttamente e la uso con modem pci adsl e un altro 
router in pppoe da diversi mesi (un collegamento tin)
qualche idea su dove sbaglio?
bye
damir

 damir
Ciao ,
tu stesso dici che utilizzi la tua linea ADSL con un altro router che
utilizza il protocollo PPPoE , il Cisco 1720 però è configurato per
utilizzare l'encapsulation PPPoA   ;)
A questo punto o chiedi al tuo provider di cambiare la tua connessione in
PPPoA oppure modifichi tu la configurazione del router .
Saluti,
Matador

 mmi snmp-timeout 180
non vorrei sbagliare.. prova intanto a togliere questi mmi... a che ti
servono (in particolare mmi pvc 8/35)?!?
Ciao...

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