[Openswan Users] Re: help for multihome route

Bob Benstro bbenstro at gmail.com
Wed Jul 13 12:17:51 CEST 2005

This maybe working, if I hiding inside pppoe.conf pppd line this unit= thing.

Thank, I try.

On 7/9/05, Jacco de Leeuw <jacco2 at dds.nl> wrote:
> >>> problem for interface line.  I have not know device for adsl, can be
> >>> ppp0 ppp1 ppp8, any ppp.  This because l2tpd assign anywhere ppp and
> >>> can take away ppp0 - ppp3 I using for ADSL modem.  All need to happen
> >>> is for one adsl go down, then sometime ipsec->l2tp happen, now ADSL is
> >>> ppp12.
> >>
> >> I believe Jacco had an answer for the moving ppp+ devices when L2TP is
> >> used. I have CC:ed him on this message.
> >
> > The 'unit' parameter in ppp-2.4.2+ can make sure that L2TP/IPsec will
> > use interface names with higher unit numbers so that the lower ones
> > are free for the ADSL link. See also:
> > http://lists.openswan.org/pipermail/users/2005-March/004164.html
> As pointed out to me by Bob Benstro, this actually won't work if there
> is more than 1 client. Pppd assigns the correct ppp unit number to the
> first client but then it will try to assign the same unit number to the
> second client. This fails with "Couldn't allocate PPP unit xxx as it is
> already in use". The Linux PPP kernel code will not pick the next free
> unit number but it picks ppp0 (which was supposed to be reserved for
> the DSL link).
> Probably a better solution is to assign high PPP unit numbers to the
> DSL link(s) using the 'unit' parameter. Then the lower unit numbers
> (ppp0, ppp1 etc.) are free for L2TP/IPsec clients. The 'unit' parameter
> does not have to be used in /etc/ppp/options.l2tpd. This should work
> as long as you assign a PPP unit number to the DSL link that is higher
> than the total number of clients.
> Jacco
> --
> Jacco de Leeuw                         mailto:jacco2 at dds.nl
> Zaandam, The Netherlands           http://www.jacco2.dds.nl

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