[c-nsp] Multilink PPP problem between 12.2 - 12.3

[Brian Lehigh]

Thanks for all the responses.  Andrew Yourtchenko figured it out.  If I
would have actually read the debug output I would have caught this sooner.
:)
 We are terminating PPPoE sessions into this router (we don't do this on any
of the others that I've configured MLPPP on) and have the following line in
my AAA config:
"aaa authentication ppp default local group radius"
So, even though I wasn't telling the Multilink interface to use
authentication I had already told the router to authenticate PPP.
Thanks for the help, all!

Brian Lehigh
Network Operations Center
Sierra Tel Internet
http://www.sti.net
 

-----Original Message-----
From: noc ops [mailto:aptgetd at gmail.com] 
Sent: Wednesday, August 24, 2005 10:14 AM
To: Brian Lehigh
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Multilink PPP problem between 12.2 - 12.3

Hi Brian,

I think you're missing "ppp authentication chap" on your serial ifs.



regards,
/virendra

Brian Lehigh wrote:
> I have setup multilink bundles in the past with very little effort but
this
> is driving me crazy.  Basically, I build the multilink interface and
assign
> it an address, set encapsulation to PPP on each of the serial interfaces
and
> add them to the multilink group and they just come up.
> I am trying to do this same process on a 7206 NPE-150 running 12.2(17a)
but
> the serial interfaces stay in up/down.  I did a debug ppp negotiation and
> debug ppp authentication and received the following:
> 
> ----------------------------
> Aug 23 14:43:11: Se2/0 PPP: Phase is DOWN [0 sess, 1 load]
> Aug 23 14:43:11: Se2/0 PPP: Phase is ESTABLISHING, Passive Open [0 sess, 1
> load]
> Aug 23 14:43:11: Se2/0 LCP: State is Listen
> Aug 23 14:43:13: Se2/0 LCP: TIMEout: State Listen
> Aug 23 14:43:13: Se2/0 LCP: O CONFREQ [Listen] id 33 len 36
> Aug 23 14:43:13: Se2/0 LCP:    MagicNumber 0x9A917F10 (0x05069A917F10)
> Aug 23 14:43:13: Se2/0 LCP:    MRRU 1524 (0x110405F4)
> Aug 23 14:43:13: Se2/0 LCP:    EndpointDisc 1 rt-core-00.mariposa
> Aug 23 14:43:13: Se2/0 LCP:     (0x13160172742D636F72652D30302E6D61)
> Aug 23 14:43:13: Se2/0 LCP:     (0x7269706F7361)
> Aug 23 14:43:13: Se2/0 LCP: I CONFREQ [REQsent] id 30 len 20
> Aug 23 14:43:13: Se2/0 LCP:    MagicNumber 0xB65F7D44 (0x0506B65F7D44)
> Aug 23 14:43:13: Se2/0 LCP:    MRRU 1524 (0x110405F4)
> Aug 23 14:43:13: Se2/0 LCP:    EndpointDisc 1 JCF (0x1306014A4346)
> Aug 23 14:43:13: Se2/0 LCP: O CONFACK [REQsent] id 30 len 20
> Aug 23 14:43:13: Se2/0 LCP:    MagicNumber 0xB65F7D44 (0x0506B65F7D44)
> Aug 23 14:43:13: Se2/0 LCP:    MRRU 1524 (0x110405F4)
> Aug 23 14:43:13: Se2/0 LCP:    EndpointDisc 1 JCF (0x1306014A4346)
> Aug 23 14:43:13: Se2/0 LCP: I CONFACK [ACKsent] id 33 len 36
> Aug 23 14:43:13: Se2/0 LCP:    MagicNumber 0x9A917F10 (0x05069A917F10)
> Aug 23 14:43:13: Se2/0 LCP:    MRRU 1524 (0x110405F4)
> Aug 23 14:43:13: Se2/0 LCP:    EndpointDisc 1 rt-core-00.mariposa
> Aug 23 14:43:13: Se2/0 LCP:     (0x13160172742D636F72652D30302E6D61)
> Aug 23 14:43:13: Se2/0 LCP:     (0x7269706F7361)
> Aug 23 14:43:13: Se2/0 LCP: State is Open
> Aug 23 14:43:13: Se2/0 AAA/AUTHOR/LCP: Denied
> Aug 23 14:43:13: Se2/0 PPP: Phase is TERMINATING [0 sess, 1 load]
> Aug 23 14:43:13: Se2/0 LCP: O TERMREQ [Open] id 34 len 4
> Aug 23 14:43:13: Se2/0 LCP: I TERMACK [TERMsent] id 34 len 4
> Aug 23 14:43:13: Se2/0 LCP: State is Closed
> ----------------------------
> 
> It looks like the link is trying to perform authentication but I didn't
> configure it to use PAP or CHAP, etc.
> Below is a snippet of the config.  What am I doing wrong here?  Does 12.2
> require authentication?  I haven't had to use this on my routers running
> 12.3 code.
> 
> interface Multilink2
>  description Multilink to customer
>  ip address xxx.xxx.106.33 255.255.255.252
>  no ip route-cache
>  no ip mroute-cache
>  no cdp enable
>  ppp multilink
>  multilink-group 2
> !          
> interface Serial2/0
>  no ip address
>  encapsulation ppp
>  load-interval 30
>  down-when-looped
>  no fair-queue
>  no cdp enable
>  ppp multilink
>  ppp multilink group 2
> !
> interface Serial2/1
>  no ip address
>  encapsulation ppp
>  load-interval 30
>  down-when-looped
>  no fair-queue
>  no cdp enable
>  ppp multilink
>  ppp multilink group 2
> !
> 
> 
> 
> Brian Lehigh
> Network Operations Center
> Sierra Tel Internet
> http://www.sti.net