IPv6 - PPPOE Login with Cisco 886

[Mark Smith]

On Mon, 10 Jan 2011 12:00:30 +0100
Harald Singer <ipv6 at haraldsinger.de> wrote:

> Hi all,
> 
> i'm trying to get online with IPv6 with my Cisco 886. But i failed. 
> Perhaps you have any hints for me.
> 
> My Config:
> 
> interface Dialer0
> description *** IPv6 ***
> no ip address
> ip flow ingress
> ip virtual-reassembly in
> encapsulation ppp
> load-interval 30
> dialer pool 1
> ipv6 address autoconfig default
> ipv6 enable
> fair-queue
> ppp authentication chap callin
> ppp chap hostname USERNAME
> ppp chap password PASSWORD
> ppp pap refuse
> no cdp enable
> 
> 
> (This config works well with an Cisco 836!)
> 
> 
> PPP protocol negotiation debugging tells me:
> 
> ...
> Jan 10 10:26:06.588 CET: Vi2 PPP: Phase is FORWARDING, Attempting 
> Forward
> Jan 10 10:26:06.588 CET: Vi2 PPP: Queue IPCP code[1] id[1]
> Jan 10 10:26:06.588 CET: Vi2 PPP: Queue IPV6CP code[1] id[1]
> Jan 10 10:26:06.592 CET: Vi2 PPP: Phase is ESTABLISHING, Finish LCP
> Jan 10 10:26:06.592 CET: Vi2 PPP: Phase is UP
> Jan 10 10:26:06.592 CET: Vi2 PPP: Process pending ncp packets
> Jan 10 10:26:06.592 CET: Vi2 IPCP: Redirect packet to Vi2
> Jan 10 10:26:06.592 CET: Vi2 IPCP: I CONFREQ [UNKNOWN] id 1 len 10
> Jan 10 10:26:06.592 CET: Vi2 IPCP:    Address 192.168.1.13 
> (0x0306D918C00D)
> Jan 10 10:26:06.592 CET: Vi2 LCP: O PROTREJ [Open] id 3 len 16 
> protocol IPCP (0x0101000C0306D918C00D)
> Jan 10 10:26:06.592 CET: Vi2 IPV6CP: Redirect packet to Vi2

Looks like either your PPP peer is broken, or the link between them, as
the following seems to indicate your end received an IPv6CP option that
it didn't understand (there is only one for IPV6CP - Interface
Identifier), and your end is therefore giving up. Same as for IPCP.
Perhaps comparing the debug output of PPP working on 836 might help
troubleshoot it.

> Jan 10 10:26:06.592 CET: Vi2 IPV6CP: I CONFREQ [UNKNOWN] id 1 len 14
> Jan 10 10:26:06.592 CET: Vi2 IPV6CP:    (0x010A021C0FFFFE38381B)
> Jan 10 10:26:06.592 CET: Vi2 LCP: O PROTREJ [Open] id 4 len 20 
> protocol IPV6CP (0x01010010010A021C0FFFFE38381B)
> Jan 10 10:26:06.596 CET: %LINEPROTO-5-UPDOWN: Line protocol on 
> Interface Virtual-Access2, changed state to up
> ...
> 


> What could be the reason for the IPV6CP Reject?
> 
> Best regards
> 
> Harald
>