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From: Nicholas Humfrey <>
Subject: Re: Configuring pppd to accept link-local IPv6 interface id from remote peer
Date: Sat, 20 Feb 2021 01:13:02 +0000	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

>> Looking at the git master branch, it looks like Pali Rohár is actively
>> working in this space:
> Well, I'll give a look to find what's wrong.

Just a quick follow up to say that it is all working fine after I 
upgraded to version 2.4.9 of pppd.

I had initially been using version 2.4.7, that came with Raspberry Pi OS 
I had also been testing using git master of the ppp repo on the 'client'.

But I hadn't tried upgrading the 'server' (the peer configured with the 
interface identifiers).
After upgrading to 2.4.9 on the 'server' it works perfectly - even with 
an older version of pppd on the 'client'.
I haven't tracked down the commit that fixed it but I guess it was 
something to do with failing to Nack the random interface identifier 
sent by the peer.

Thank you for your help and thoughts on the issue.


|pppd file ./ppp-options ipv6cp-accept-local /dev/ttyAMA0 115200 using 
channel 368 Using interface ppp0 Connect: ppp0 <--> /dev/ttyAMA0 sent 
[LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x7f793cbe>] rcvd [LCP ConfReq 
id=0xb <asyncmap 0x0> <magic 0xecde7250>] sent [LCP ConfAck id=0xb 
<asyncmap 0x0> <magic 0xecde7250>] rcvd [LCP ConfReq id=0xb <asyncmap 
0x0> <magic 0xecde7250>] sent [LCP ConfAck id=0xb <asyncmap 0x0> <magic 
0xecde7250>] rcvd [LCP ConfAck id=0x1 <asyncmap 0x0> <magic 0x7f793cbe>] 
sent [LCP EchoReq id=0x0 magic=0x7f793cbe] sent [IPV6CP ConfReq id=0x1 
<addr fe80::0dfd:3c3b:e130:91ce>] rcvd [LCP EchoReq id=0x0 
magic=0xecde7250] sent [LCP EchoRep id=0x0 magic=0x7f793cbe] rcvd [LCP 
EchoRep id=0x0 magic=0xecde7250] rcvd [IPV6CP ConfReq id=0xb <addr 
fe80::0000:0000:0000:0001>] sent [IPV6CP ConfAck id=0xb <addr 
fe80::0000:0000:0000:0001>] rcvd [IPV6CP ConfNak id=0x1 <addr 
fe80::0000:0000:0000:0002>] sent [IPV6CP ConfReq id=0x2 <addr 
fe80::0000:0000:0000:0002>] rcvd [IPV6CP ConfAck id=0x2 <addr 
fe80::0000:0000:0000:0002>] local LL address fe80::0000:0000:0000:0002 
remote LL address fe80::0000:0000:0000:0001 Script /etc/ppp/ipv6-up 
started (pid 7049) Script /etc/ppp/ipv6-up finished (pid 7049), status = 
0x0 |

      parent reply	other threads:[~2021-02-20  1:13 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-14  1:03 Configuring pppd to accept link-local IPv6 interface id from remote peer Nicholas Humfrey
2021-02-14  1:57 ` Michael Richardson
2021-02-14 13:42 ` Nicholas Humfrey
2021-02-14 16:23 ` James Carlson
2021-02-14 17:07 ` Kurt Van Dijck
2021-02-14 17:50 ` James Carlson
2021-02-14 21:24 ` Benjamin Cama
2021-02-14 22:46 ` James Carlson
2021-02-14 23:15 ` Benjamin Cama
2021-02-16  0:10 ` Nicholas Humfrey
2021-02-16 10:04 ` Benjamin Cama
2021-02-18  0:18 ` Nicholas Humfrey
2021-02-20  1:13 ` Nicholas Humfrey [this message]

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