[c-nsp] PPPoA DSL up/up, no traffic

Tue Oct 2 14:18:04 EDT 2007

config-wise, it looks ok.  only thing you need to do (if necessary) is
to configure NAT and translate between your FE and Dialer interface.
otherwise you won't be able to get out onto the internet.

That said, sounds like your DSL layer is up, but you have a L2/L3 issue.
you are not getting any incoming PPP packets.

the reasons could be as follows:

a) you are using the wrong ATM VC
b) the upstream SP has not terminated the VC on an aggregator
c) some other problem upstream of the DSLAM

i had a similar problem recently (~4 months ago) when my 827 went
down (after working for 2+ years).  a call to the 1st level tech support
put me through the did you power cycle the PC 20 questions.  I told
them i already troubleshot my side and the issue was a L2/L3 issue and
asked for escalation to their next tier.  their 2nd level support just
rebuilt the circuit and things came back up as we were on the line.

Once the PPP session is fixed and you get an IP address on your dialer
interface, you may need to configure NAT if required.

cheers
.siva

On Tue, 2 Oct 2007, Adam Greene wrote:

> Hi,
>
> I'm trying to configure a DSL line on a Cisco 1841 (C1841-IPBASE-M), Version
> 12.4(1c).
>
> The atm interface is plugged into a DSL line, it shows up/up, I have packets
> going out, but none coming back in.
>
> Do I have to do something in particular to initiate the connection? Are
> there obvious errors with the config? Perhaps I need to contact the ISP.
>
> Disclaimer: this is the first DSL line I've ever configured (might be
> obvious).
>
> Thanks for the help.
> Adam
>
>
> Here are the configurations so far, and some command / debug output:
>
> ========
> CONFIGS
> ========
>
> !
> aaa new-model
> !
> aaa session-id common
> !
> mmi polling-interval 60
> no mmi auto-configure
> no mmi pvc
> !
> interface FastEthernet0/0
> ip address x.x.x.x 255.255.252.0
> duplex auto
> speed auto
> !
> interface ATM0/0/0
> no ip address
> no ip mroute-cache
> no atm ilmi-keepalive
> dsl operating-mode auto
> hold-queue 224 in
> pvc 0/35
>  encapsulation aal5snap
>  protocol ppp dialer
>  dialer pool-member 1
> !
> interface Dialer1
> ip address negotiated
> ip mtu 1492
> encapsulation ppp
> no ip mroute-cache
> dialer pool 1
> dialer idle-timeout 0
> dialer-group 1
> ppp authentication pap callin
> ppp pap sent-username **** password 7 ****
> !
> ip route 0.0.0.0 0.0.0.0 Dialer1
> !
> dialer-list 1 protocol ip permit
> !
> end
>
>
> =============
> SH INT ATM0/0/0
> =============
>
> ATM0/0/0 is up, line protocol is up
>  Hardware is DSLSAR (with Alcatel ADSL Module)
>  MTU 4470 bytes, sub MTU 4470, BW 832 Kbit, DLY 610 usec,
>     reliability 255/255, 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, 1 current VCCs
>  VC Auto Creation Disabled.
>  VC idle disconnect time: 300 seconds
>  Last input never, output 00:00:17, 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 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
>     66050 packets output, 1056800 bytes, 0 underruns
>     0 output errors, 0 collisions, 0 interface resets
>     0 output buffer failures, 0 output buffers swapped out
>
> ======================
> DEBUG PPP NEGOTIATION
> ======================
> *Oct  2 15:51:10.173: %LINK-3-UPDOWN: Interface ATM0/0/0, changed state to
> up
> *Oct  2 15:51:13.173: %LINEPROTO-5-UPDOWN: Line protocol on Interface
> ATM0/0/0,
> changed state to up
> *Oct  2 15:51:13.173: %LINK-3-UPDOWN: Interface Virtual-Access2, changed
> state to up
> *Oct  2 15:51:13.173: %DIALER-6-BIND: Interface Vi2 bound to profile Di1
> *Oct  2 15:51:13.173: Vi2 PPP: Using dialer call direction
> *Oct  2 15:51:13.173: Vi2 PPP: Treating connection as a callout
> *Oct  2 15:51:13.173: Vi2 PPP: Session handle[EF000004] Session id[2]
> *Oct  2 15:51:13.173: Vi2 PPP: Phase is ESTABLISHING, Active Open
> *Oct  2 15:51:13.173: Vi2 PPP: No remote authentication for call-out
> *Oct  2 15:51:13.173: Vi2 LCP: O CONFREQ [Closed] id 173 len 10
> *Oct  2 15:51:13.173: Vi2 LCP:    MagicNumber 0x2FA57203 (0x05062FA57203)
> *Oct  2 15:51:15.161: Vi2 LCP: TIMEout: State REQsent
> *Oct  2 15:51:15.161: Vi2 LCP: O CONFREQ [REQsent] id 174 len 10
> *Oct  2 15:51:15.161: Vi2 LCP:    MagicNumber 0x2FA57203 (0x05062FA57203)
> *Oct  2 15:51:17.177: Vi2 LCP: TIMEout: State REQsent
> *Oct  2 15:51:17.177: Vi2 LCP: O CONFREQ [REQsent] id 175 len 10
> *Oct  2 15:51:17.177: Vi2 LCP:    MagicNumber 0x2FA57203 (0x05062FA57203)
> *Oct  2 15:51:19.193: Vi2 LCP: TIMEout: State REQsent
> *Oct  2 15:51:19.193: Vi2 LCP: O CONFREQ [REQsent] id 176 len 10
> *Oct  2 15:51:19.193: Vi2 LCP:    MagicNumber 0x2FA57203 (0x05062FA57203)
> *Oct  2 15:51:21.209: Vi2 LCP: TIMEout: State REQsent
> *Oct  2 15:51:21.209: Vi2 LCP: O CONFREQ [REQsent] id 177 len 10
> *Oct  2 15:51:21.209: Vi2 LCP:    MagicNumber 0x2FA57203 (0x05062FA57203)
> *Oct  2 15:51:23.225: Vi2 LCP: TIMEout: State REQsent
> *Oct  2 15:51:23.225: Vi2 LCP: O CONFREQ [REQsent] id 178 len 10
> *Oct  2 15:51:23.225: Vi2 LCP:    MagicNumber 0x2FA57203 (0x05062FA57203)
> *Oct  2 15:51:25.241: Vi2 LCP: TIMEout: State REQsent
> *Oct  2 15:51:25.241: Vi2 LCP: O CONFREQ [REQsent] id 179 len 10
> *Oct  2 15:51:25.241: Vi2 LCP:    MagicNumber 0x2FA57203 (0x05062FA57203)
> *Oct  2 15:51:27.257: Vi2 LCP: TIMEout: State REQsent
> *Oct  2 15:51:27.257: Vi2 LCP: O CONFREQ [REQsent] id 180 len 10
> *Oct  2 15:51:27.257: Vi2 LCP:    MagicNumber 0x2FA57203 (0x05062FA57203)
> *Oct  2 15:51:29.273: Vi2 LCP: TIMEout: State REQsent
> *Oct  2 15:51:29.273: Vi2 LCP: O CONFREQ [REQsent] id 181 len 10
> *Oct  2 15:51:29.273: Vi2 LCP:    MagicNumber 0x2FA57203 (0x05062FA57203)
> *Oct  2 15:51:31.289: Vi2 LCP: TIMEout: State REQsent
> *Oct  2 15:51:31.289: Vi2 LCP: O CONFREQ [REQsent] id 182 len 10
> *Oct  2 15:51:31.289: Vi2 LCP:    MagicNumber 0x2FA57203 (0x05062FA57203)
> *Oct  2 15:51:33.305: Vi2 LCP: TIMEout: State REQsent
> *Oct  2 15:51:33.305: Vi2 LCP: State is Listen
> *Oct  2 15:52:03.321: Vi2 LCP: TIMEout: State Listen
> *Oct  2 15:52:03.321: Vi2 PPP: No remote authentication for call-out
> *Oct  2 15:52:03.321: Vi2 LCP: O CONFREQ [Listen] id 183 len 10
> *Oct  2 15:52:03.321: Vi2 LCP:    MagicNumber 0x2FA635E8 (0x05062FA635E8)
> *Oct  2 15:52:05.337: Vi2 LCP: TIMEout: State REQsent
> *Oct  2 15:52:05.337: Vi2 LCP: O CONFREQ [REQsent] id 184 len 10
> *Oct  2 15:52:05.337: Vi2 LCP:    MagicNumber 0x2FA635E8 (0x05062FA635E8)
> *Oct  2 15:52:07.353: Vi2 LCP: TIMEout: State REQsent
> *Oct  2 15:52:07.353: Vi2 LCP: O CONFREQ [REQsent] id 185 len 10
> *Oct  2 15:52:07.353: Vi2 LCP:    MagicNumber 0x2FA635E8 (0x05062FA635E8)
> *Oct  2 15:52:09.369: Vi2 LCP: TIMEout: State REQsent
> *Oct  2 15:52:09.369: Vi2 LCP: O CONFREQ [REQsent] id 186 len 10
> *Oct  2 15:52:09.369: Vi2 LCP:    MagicNumber 0x2FA635E8 (0x05062FA635E8)
> *Oct  2 15:52:11.385: Vi2 LCP: TIMEout: State REQsent
> *Oct  2 15:52:11.385: Vi2 LCP: O CONFREQ [REQsent] id 187 len 10
> *Oct  2 15:52:11.385: Vi2 LCP:    MagicNumber 0x2FA635E8 (0x05062FA635E8)
> *Oct  2 15:52:13.401: Vi2 LCP: TIMEout: State REQsent
> *Oct  2 15:52:13.401: Vi2 LCP: O CONFREQ [REQsent] id 188 len 10
> *Oct  2 15:52:13.401: Vi2 LCP:    MagicNumber 0x2FA635E8 (0x05062FA635E8)
> *Oct  2 15:52:15.417: Vi2 LCP: TIMEout: State REQsent
> *Oct  2 15:52:15.417: Vi2 LCP: O CONFREQ [REQsent] id 189 len 10
> *Oct  2 15:52:15.417: Vi2 LCP:    MagicNumber 0x2FA635E8 (0x05062FA635E8)
> *Oct  2 15:52:17.433: Vi2 LCP: TIMEout: State REQsent
> *Oct  2 15:52:17.433: Vi2 LCP: O CONFREQ [REQsent] id 190 len 10
> *Oct  2 15:52:17.433: Vi2 LCP:    MagicNumber 0x2FA635E8 (0x05062FA635E8)
> *Oct  2 15:52:19.449: Vi2 LCP: TIMEout: State REQsent
> *Oct  2 15:52:19.449: Vi2 LCP: O CONFREQ [REQsent] id 191 len 10
> *Oct  2 15:52:19.449: Vi2 LCP:    MagicNumber 0x2FA635E8 (0x05062FA635E8)
> *Oct  2 15:52:21.465: Vi2 LCP: TIMEout: State REQsent
> *Oct  2 15:52:21.465: Vi2 LCP: O CONFREQ [REQsent] id 192 len 10
> *Oct  2 15:52:21.465: Vi2 LCP:    MagicNumber 0x2FA635E8 (0x05062FA635E8)
> *Oct  2 15:52:23.481: Vi2 LCP: TIMEout: State REQsent
> *Oct  2 15:52:23.481: Vi2 LCP: State is Listen
>
>
> =================
> DEBUG ATM EVENTS
> =================
> *Oct  2 17:56:16.976: ATM0/0/0 check_lockup: scc = 0, output_qcount = 0,
> head:(s)91, 92,
> addr = (s)0x0, 0x0, count (s)67719, 67720
> *Oct  2 17:56:16.976: ATM0/0/0 check_lockup: scc = 1, output_qcount = 0,
> head:(s)55, 55,
> addr = (s)0x0, 0x0, count (s)112, 112
> *Oct  2 17:56:26.936: ATM0/0/0 check_lockup: scc = 0, output_qcount = 0,
> head:(s)92, 92,
> addr = (s)0x0, 0x0, count (s)67720, 67720
> *Oct  2 17:56:26.936: ATM0/0/0 check_lockup: scc = 1, output_qcount = 0,
> head:(s)55, 55,
> addr = (s)0x0, 0x0, count (s)112, 112
> *Oct  2 17:56:36.932: ATM0/0/0 check_lockup: scc = 0, output_qcount = 0,
> head:(s)92, 92,
> addr = (s)0x0, 0x0, count (s)67720, 67720
> *Oct  2 17:56:36.932: ATM0/0/0 check_lockup: scc = 1, output_qcount = 0,
> head:(s)55, 55,
> addr = (s)0x0, 0x0, count (s)112, 112
>
>
>
>
>
>
>
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
>