Hoi,
I have recently switched from a Zyxel modem terminated pppoe
connection, to an OpenBSD based termination of the pppoe connection. I
think I have a reasonable configuration, and both kernel as well as
userland pppoe configs connect fine, but after a few minutes the
ingress traffic halts and the connection drops. I am running 5.2, with
the following /etc/ppp/ppp.conf ([1] for userland) and
/etc/hostname.pppoe0 ([2] for kernel). Both exhibit the same issue.
When the connection establishes, I have the following device:
$ ifconfig pppoe0
pppoe0: flags=8851<UP,POINTOPOINT,RUNNING,SIMPLEX,MULTICAST> mtu 1492
priority: 0
dev: vlan5 state: session
sid: 0x1268 PADI retries: 8 PADR retries: 0 time: 00:04:02
sppp: phase network authproto chap authname "[email protected]"
groups: pppoe
status: active
inet6 fe80::260:e0ff:fe53:7978%pppoe0 -> prefixlen 64 scopeid 0x1e
inet 81.6.62.85 --> 80.254.161.242 netmask 0xffffffff
The ISP routes me 81.6.62.84/30 and when the connection is up, this
works (I can ping all 4 IP addresses). There's a netscreen at
81.6.62.86 behind this machine and it is responding to ping's from the
internet just fine. A few minutes later, traffic stops flowing and
about one minute later, pppoe0 disconnects and then reconnects a few
minutes later, to rinse and repeat. So I tcpdump'ed the kernel pppoe,
and noticed the following snippet (see [3] for details). I am MAC
00:60:e0:53:79:79 , the ISP is MAC 00:90:1a:a4:8d:20.
At 00:27:30.706636 I see ingress to .86, which is replied at
00:27:30.708050 egress. Then, ingress halts. I send three echos at
00:27:52.564297, 00:28:02.563980 and 00:28:12.563665, and then give up
at 00:28:22.563420 and send a Terminate-Request. I then send three
Initiation requests, which are answered finally at 00:29:27.771647 by
the ISP. The connection re-establishes and the cycle repeats.
When I try the same thing using userland ppp (to benefit from
debugging), things look pretty good to me, but also after a few
minutes the physical link goes silent and I disconnect. The logs[4]
show that the connection establishes (and on the ppp command line,
'show ipcp' and 'show lcp' look fine to me), but the problem persists.
I've read up on ppp/pppd/pppoe for both userspace and kernel, but I'm
stumped and at this point I believe the problem is with the ISP (I say
this because traffic stops flowing while I'm sending LCP echos, and I
always reply the ISPs echos, but after a few failed echos pppoe on my
machine gives up). Can somebody please confirm this before I open a
problem ticket with my ISP, or help me find a way to gather more
information to diagnose this issue?
Kind regards,
Pim/ Zurich
[1] cat /etc/ppp/ppp.conf
default:
set log Phase Chat LCP IPCP CCP tun command
set speed sync
disable acfcomp protocomp shortseq vjcomp
deny acfcomp
green:
set device "!/usr/sbin/pppoe -i vlan5"
set mtu max 1492
set mru max 1492
set authname "[email protected]"
set authkey "Y"
set ifaddr 0.0.0.0 0.0.0.0
disable echo lqr
deny lqr
[2] cat /etc/hostname.pppoe0
inet 0.0.0.0 255.255.255.255 NONE pppoedev vlan5 authproto chap
authname '[email protected]' authkey 'Y' up
dest 0.0.0.1
[3] http://pastebin.com/ph6xrNaW
[4] http://pastebin.com/grifHJ41
--
Pim van Pelt <[email protected]>
PBVP1-RIPE - http://www.ipng.nl/
