Ubuntu
xl2tpd package

xl2tpd connection speed is too low

Bug #400748 reported by Joe_Bishop
26
This bug affects 4 people
Affects Status Importance Assigned to Milestone
xl2tpd (Ubuntu)
Confirmed
Undecided
Unassigned

Bug Description

$ uname -a
Linux bishop 2.6.31-3-generic #19-Ubuntu SMP Tue Jul 14 16:07:02 UTC 2009 x86_64 GNU/Linux

~$ apt-cache policy xl2tpd
xl2tpd:
  Installed: 1.2.4+dfsg-1
  Candidate: 1.2.4+dfsg-1
  Version table:
 *** 1.2.4+dfsg-1 0
        500 http://archive.ubuntu.com karmic/universe Packages
        100 /var/lib/dpkg/status

I have 30Mb/s connection speed through l2tp, and it works ok two days ago. But now it's too slow, about 100 kilobyte per second instead of 3.6Mb. Windows reach these 30Mb/s.

Revision history for this message
Joe_Bishop (denis-cheremisov-gmail) wrote :

Everything is OK too with kernel 2.6.31-2-generic.

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Joe_Bishop (denis-cheremisov-gmail) wrote :

2.6.31-4 is even slower.
2.6.31-2 hangs while intensive network operations. 2.6.30 is much more stable.

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Joe_Bishop (denis-cheremisov-gmail) wrote :

2.6.31-6: http://www.speedtest.net/result/547845173.png
2.6.30-10: http://www.speedtest.net/result/547846747.png

Revision history for this message
Joe_Bishop (denis-cheremisov-gmail) wrote :

2.6.31-10 partially improved this. Today it only 2 times slower on download and about 4 times slower on upload. But the whole system sometimes hangs on, so no keyboard/mouse/etc doesn't work, and then leaves it after are minute or something.

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Joe_Bishop (denis-cheremisov-gmail) wrote :

2.6.31-11 is a disaster. The whole system is driven into hang up in most cases.

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Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in xl2tpd (Ubuntu):
status: New → Confirmed
Revision history for this message
Helm & Walter IT-Solutions (bernd-helm) wrote :

we are having serious problems with the l2tp speed, tried different combinations of servers (xl2tpd and accel-ppp) and clients (based on xl2ptd) and never getting a speed above 10 Mbit.

last test was client on lan -> server on lan -> 100Mbit internet link:
http://www.speedtest.net/my-result/3490814450

client:
this config: https://wiki.archlinux.org/index.php/L2TP/IPsec_VPN_client_setup
Linux rawwork 3.14.2-1-ARCH
xl2tpd-1.3.6
pppd version 2.4.6
openswan 2.6.41-1

Server:
this config: http://www.elastichosts.com/support/tutorials/linux-l2tpipsec-vpn-server/
Linux knxwork 3.14-trunk-amd64
xl2tpd version: xl2tpd-1.3.6
pptpd v1.4.0
Linux Openswan U2.6.38-g312f1b8a-dirty/K3.14-trunk-amd64 (netkey)

no idea if this is related to xl2tpd or another component, but there is a problem for sure. let me know if you need more informations to reproduce. the requirements are grown, we have 100Mbit lines at home and gigabit lines at webservers now. L2tp is still a poplular protocol that should keep up with these speeds.

If you need more informations to reproduce, please let me know.

Revision history for this message
Douglas Kosovic (dkosovic) wrote :

I just saw this bug report now while looking foranother xl2tpd bug.

You might have already worked it out by now, but in regards to the xl2tpd max transmit and receive speeds, the default max is 10 Mbps.

See the xl2tpd.conf manpage for the 'tx bps' and 'rx bps' options to set it higher.

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