Re: RFC1483 Bridging

From: William McCall <william.mccall_at_gmail.com>
Date: Thu, 20 May 2010 00:13:57 -0500

Let us debug this problem from nice simple commands.

Can you do a "debug pppoe events" then check and see if the PADI is
sent out? Follow Joe's advice and set the persistent dialer
beforehand.

If the PADI is sent, do you see the relevant PADO returned?

--WM

On Wed, May 19, 2010 at 10:45 AM, Arun Kumar Arumuganainar
<aarumuga_at_hotmail.com> wrote:
> Hi Nish ,
>
>
>
> THe problem I am seeing is that PPP never kicks in. Dialer is not initiating
> the PPP Session because it thinks that Dialer string is not set.
>
>
>
> I understand if PPP authentication is the problem I would have got the PPP
> debugs which would clearly tell me that authentiation has indeed failed.
>
>
>
> Having said that I did change the configuration and found that nothing changed
> after enabling PAP ( as per your instruction ). Moreover I stuck the configs
> on the ATM interface ( WIC1-ADSL on 1841 ) , there is not problem in getting
> authenticated via CHAP . I removed the bridging on Modem and applied the same
> user name and password on the MODEM , it worked absolutely fine. It appears to
> me that this is not a PPP issue but a dialer issue. But I could not figure out
> why dialer is looking for a dialer string for initiating PPP.
>
>
>
> Thanks and Regards
>
> Arun
>
>> Date: Wed, 19 May 2010 16:29:30 +0100
>> Subject: Re: RFC1483 Bridging
>> From: ipnish_at_gmail.com
>> To: aarumuga_at_hotmail.com
>> CC: jastorino_at_ipexpert.com; aarumuganainar_at_relianceglobalcom.com;
> ccielab_at_groupstudy.com
>>
>> ppp authentication chap pap callin
>> ppp chap password 7 PASSWORD
>> ppp pap sent-username user_at_name password 7 PASSWORD
>>
>> Tell me whether this work please?
>>
>> Thanks,
>>
>> Regards,
>> Nish
>>
>>
>> On Wed, May 19, 2010 at 4:20 PM, Arun Kumar Arumuganainar <
>> aarumuga_at_hotmail.com> wrote:
>>
>> > Hi Jose,
>> >
>> >
>> >
>> > I re-did this lab testing with 1841 running 12.4(11)T7 Advance IPSERVCES
>> > image.
>> >
>> >
>> >
>> > Router Model : 1841
>> >
>> > Topology : 1841----MODEM(RFC1483
>> > Bridge)---------DSLAM(LAC)----IPCLOUD----Providermanaged LNS
>> >
>> >
>> > I enabled following debug
>> >
>> >
>> >
>> > 1) PPP Neg and PPP AUTH
>> >
>> > 2) Dialer events
>> >
>> >
>> >
>> > When I tried to genarate the traffic I could see dialer is not initiating
>> > the
>> > PPP at all.
>> >
>> >
>> >
>> > Any ideas what could be wrong. I appreciate any help in resolving this
>> > issue.
>> >
>> >
>> > ERIKS-TEST-R1#ping 172.20.83.1
>> >
>> > Type escape sequence to abort.
>> > Sending 5, 100-byte ICMP Echos to 172.20.83.1, timeout is 2 seconds:
>> >
>> > Di1 DDR: ip (s=172.30.128.9, d=172.20.83.1), 100 bytes, outgoing
>> > interesting
>> > (ip PERMIT)
>> > Di1 DDR: Cannot place call, no dialer string set.
>> > Di1 DDR: ip (s=172.30.128.9, d=172.20.83.1), 100 bytes, outgoing
>> > interesting
>> > (ip PERMIT)
>> > Di1 DDR: Cannot place call, no dialer string set
>> > Di1 DDR: ip (s=172.30.128.9, d=82.196.34.254), 76 bytes, outgoing
>> > interesting
>> > (ip PERMIT)
>> > Di1 DDR: Cannot place call, no dialer string set.
>> > Di1 DDR: ip (s=172.30.128.9, d=172.20.83.1), 100 bytes, outgoing
>> > interesting
>> > (ip PERMIT)
>> > Di1 DDR: Cannot place call, no dialer string set.
>> > Di1 DDR: ip (s=172.30.128.9, d=172.20.83.1), 100 bytes, outgoing
>> > interesting
>> > (ip PERMIT)
>> > Di1 DDR: Cannot place call, no dialer string set.
>> > Di1 DDR: ip (s=172.30.128.9, d=172.20.83.1), 100 bytes, outgoing
>> > interesting
>> > (ip PERMIT)
>> > Di1 DDR: Cannot place call, no dialer string set.
>> > Success rate is 0 percent (0/5)
>> >
>> >
>> > Pls find below router configs .
>> >
>> >
>> >
>> > ERIKS-TEST-R1#
>> >
>> >
>> > RUnning configuration:-
>> >
>> > Building configuration...
>> >
>> > Current configuration : 1575 bytes
>> > !
>> > version 12.3
>> > no service timestamps debug uptime
>> > service timestamps log datetime msec
>> > no service password-encryption
>> > !
>> > hostname ERIKS-TEST-R1
>> > !
>> > boot-start-marker
>> > boot-end-marker
>> > !
>> > enable secret 5 $1$HxhJ$Xr15HUD0MhM1BahR3vQxI.
>> > !
>> > memory-size iomem 25
>> > mmi polling-interval 60
>> > no mmi auto-configure
>> > no mmi pvc
>> > mmi snmp-timeout 180
>> > no aaa new-model
>> > ip subnet-zero
>> > ip cef
>> > !
>> > !
>> > !
>> > !
>> > no ip domain lookup
>> > ip ips po max-events 100
>> > vpdn enable
>> > !
>> > vpdn-group 1
>> > request-dialin
>> > protocol pppoe
>> > !
>> > no ftp-server write-enable
>> > !
>> > !
>> > !
>> > !
>> > !
>> > !
>> > !
>> > !
>> > !
>> > !
>> > !
>> > !
>> > !
>> > !
>> > !
>> > !
>> > no crypto isakmp ccm
>> > !
>> > !
>> > !
>> > !
>> > interface Loopback0
>> > ip address 172.30.128.9 255.255.255.255
>> > !
>> > interface FastEthernet0/0
>> > no ip address
>> > speed 100
>> > full-duplex
>> > pppoe enable group global
>> > pppoe-client dial-pool-number 1
>> > !
>> > interface FastEthernet0/1
>> > no ip address
>> > duplex auto
>> > speed auto
>> > !
>> > interface ATM0/1/0
>> > no ip address
>> > no atm ilmi-keepalive
>> > dsl operating-mode auto
>> > !
>> > interface Dialer1
>> > description ADSL2+ 02085605343 Provider TISCALI
>> > ip address negotiated
>> > ip mtu 1460
>> > encapsulation ppp
>> > ip tcp adjust-mss 1420
>> > dialer pool 1
>> > dialer-group 1
>> > no cdp enable
>> > ppp chap hostname <<HOST NAME REMOVED>>
>> >
>> > ppp chap password 0 <<PASSWORD REMOVED>>
>> > ppp pap refuse
>> > !
>> > ip classless
>> > ip route 0.0.0.0 0.0.0.0 Dialer1
>> > !
>> > !
>> > ip http server
>> > no ip http secure-server
>> > !
>> > dialer-list 1 protocol ip permit
>> > !
>> > !
>> > !
>> > !
>> > control-plane
>> > !
>> > !
>> > !
>> > !
>> > !
>> > !
>> > !
>> > !
>> > line con 0
>> > line aux 0
>> > line vty 0 4
>> > password vanco
>> > login
>> >
>> >
>> >
>> > Thanks and Regards
>> >
>> > Arun
>> >
>> >
>> >
>> > =========================
>> >
>> >
>> >
>> >
>> >
>> >
>> > > From: jastorino_at_ipexpert.com
>> > > Date: Tue, 18 May 2010 15:49:10 -0400
>> > > Subject: Re: RFC1483 Bridging
>> > > To: aarumuga_at_hotmail.com
>> > > CC: aarumuganainar_at_relianceglobalcom.com; ccielab_at_groupstudy.com
>> > >
>> > > Try debug ppp neg / debug ppp auth and see what you get
>> > >
>> > > On Tue, May 18, 2010 at 10:32 AM, Arun Kumar Arumuganainar
>> > > <aarumuga_at_hotmail.com> wrote:
>> > > > I did tried the configs that you have suggested . I did not see any
>> > activity
>> > > > on the router.
>> > > >
>> > > > I did enable PPP authentication. But did not get any message back
>> > > >
>> > > > Am I missing something? Is there any debug commands that I can use to
>> > spot
>> > > > where the issue is.
>> > > >
>> > > > Thanks and Regards
>> > > > Arun
>> > > >
>> > > >> From: jastorino_at_ipexpert.com
>> > > >> Date: Tue, 18 May 2010 06:57:47 -0400
>> > > >> Subject: Re: RFC1483 Bridging
>> > > >> To: aarumuga_at_hotmail.com
>> > > >> CC: aarumuganainar_at_relianceglobalcom.com; ccielab_at_groupstudy.com
>> > > >>
>> > > >> Hi Arun,
>> > > >>
>> > > >> First, make sure you set your DSL modem to bridged mode properly
> like
>> > > >> you said. Then, you will need to configure PPPoE on the Cisco
> router.
>> > > >> Give this a try
>> > > >>
>> > > >> interface FastEthernet0/0
>> > > >> no ip address
>> > > >> pppoe enable
>> > > >> pppoe-client dial-pool-number 1
>> > > >> !
>> > > >> interface Dialer1
>> > > >> mtu 1492
>> > > >> ip address negotiated
>> > > >> encapsulation ppp
>> > > >> dialer pool 1
>> > > >>
>> > > >> HTH
>> > > >>
>> > > >>
>> > > >>
>> > > >> On Tue, May 18, 2010 at 6:35 AM, Arun Kumar Arumuganainar
>> > > >> <aarumuga_at_hotmail.com> wrote:
>> > > >> > Hi,
>> > > >> >
>> > > >> >
>> > > >> >
>> > > >> > I need some help in setting my router. My set up look like this.
>> > > >> >
>> > > >> >
>> > > >> >
>> > > >> > 877 ------- NETGEAR/DLINIK MODEM----------------PROVIDER DSALAM
>> > > >> >
>> > > >> >
>> > > >> >
>> > > >> > I wanted PPPOE terminating on to my router's ethernet interface
>> > rather
>> > > >> > than
>> > > >> > the modem. The reason being , I wanted to do some clever stuff :-)
>> > > >> > behind the
>> > > >> > router.
>> > > >> >
>> > > >> >
>> > > >> >
>> > > >> > I could see there are options available on NETGEAR or DLINK modem
>> > for
>> > > >> > RFC
>> > > >> > 1483 Bridging. But could not figure out how to configure 877 .
>> > > >> >
>> > > >> >
>> > > >> >
>> > > >> > Do any body have any sample configuration for such a type of
>> > scenario.
>> > > >> > It
>> > > >> > would be great if you can help me here.
>> > > >> >
>> > > >> >
>> > > >> >
>> > > >> > Thanks and Regards
>> > > >> >
>> > > >> > Arun
>> > > >> >
>> > > >> >
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>> > > >> >
>> > > >> >
>> > > >> >
>> > > >>
>> > > >>
>> > > >>
>> > > >> --
>> > > >> Regards,
>> > > >>
>> > > >>
>> > > >>
>> > > >> Joe Astorino - CCIE #24347
>> > > >> Sr. Technical Instructor - IPexpert
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>> > > Sr. Technical Instructor - IPexpert
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>
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-- 
William McCall, CCIE #25044
Blogs and organic groups at http://www.ccie.net
Received on Thu May 20 2010 - 00:13:57 ART

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