Alexander Motin wrote:
Alex Povolotsky wrote:
Thanks, it seems to be more or less stable; however, throughput is
quite little, lots of packets lost and "No buffer space available" on
attempt to ping VPN addresses (only VPN is affected).
Have you tried to disable PPTP windowing in mpd config? ENOBUFS is the
errno used by ng_pptp node's windowing code when outgoing window is
full. It is not related to any system tunables. Maximum window size in
current ng_pptp is 16 packets. It can be small for LFNs and can reduce
speed.
I guess I should tune some kernel tunable, but what specific one?
I can recomend you to set
net.graph.maxdgram=524288
net.graph.recvspace=524288
to make 'ngctl list' command work, but it is not critical.
Whoops!
After disabling windowing and setting net.graph's, mpd4 refuses to work
Feb 22 19:41:43 gw mpd: can't create socket node: No buffer space available
Feb 22 19:41:43 gw mpd: pptp0: killing connection with 172.23.115.234 1735
Feb 22 19:41:44 gw mpd: PPTP connection from 172.23.114.214 2955
Feb 22 19:41:44 gw mpd: pptp0: attached to connection with
172.23.114.214 2955
Feb 22 19:41:44 gw mpd: [pptp7] Accepting PPTP connection
Feb 22 19:41:44 gw mpd: [pptp7] opening link "pptp7"...
Feb 22 19:41:44 gw mpd: [pptp7] link: OPEN event
Feb 22 19:41:44 gw mpd: [pptp7] LCP: Open event
Feb 22 19:41:44 gw mpd: [pptp7] LCP: state change Initial --> Starting
Feb 22 19:41:44 gw mpd: [pptp7] LCP: LayerStart
Feb 22 19:41:44 gw mpd: [pptp7] attaching to peer's outgoing call
Feb 22 19:41:44 gw mpd: [pptp7] can't attach pptpgre node: Bad file
descriptor
Feb 22 19:41:44 gw mpd: pptp0-0: killing channel
Feb 22 19:41:44 gw mpd: [pptp7] PPTP call cancelled in state CONNECTING
Feb 22 19:41:44 gw mpd: pptp0: closing connection with 172.23.114.214 2955
Feb 22 19:41:44 gw mpd: [pptp7] can't shutdown "bypass.link0": Bad file
descript
or
Feb 22 19:41:44 gw mpd: [pptp7] link: DOWN event
Feb 22 19:41:44 gw mpd: [pptp7] LCP: Close event
Feb 22 19:41:44 gw mpd: [pptp7] LCP: state change Starting --> Initial
Feb 22 19:41:44 gw mpd: [pptp7] LCP: LayerFinish
and no ng interfaces ever created
lowering both tunables to 128000 solved the problem, will look more.
Alex.
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