112 lines
5.8 KiB
Plaintext
112 lines
5.8 KiB
Plaintext
Date: Sat, 19 Oct 1996 02:21:45 +0200
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X-Sender: sw0001@aixrs1.hrz.uni-essen.de To: isdn4linux@hub-wue.franken.de
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From: Matthias Hessler <hessler@wi-inf.uni-essen.de> Subject: RE: options files
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Sender: owner-isdn4linux@hub-wue.franken.de Reply-To: isdn4linux@hub-wue.franken.de
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At 17:57 18.10.1996 +0200, you wrote:
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>Matthias Hessler <hessler@wi-inf.uni-essen.de> ha escrito a
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>isdn4linux@hub-wue.franken.de:
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>
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>> well, isdnctrl does not quite assign interface ipppx to /dev/ipppx by
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>> default (e.g. interface ippp3 to /dev/ippp3). I'm not entirely sure how
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>it
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>> does its assignements, but I think it takes interface ipppx and binds it
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>to
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>> the first available /dev/ipppx, starting x with 0 and counting up (e.g.
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>your
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>> interface ippp3 gets bound to /dev/ippp0 because there is an ipppd
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>already
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>> waiting there)
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>> Which leads to your problem: you want interface ippp3 _exclusively_ bound
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>to
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>> /dev/ippp3 because you want only your ipppd configured for /dev/ippp3
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>> answering all the traffic from your interface ippp3.
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>
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>Hi Matthias
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>
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>Ok; for clarifying scripts (and my concepts :) I name net interfaces
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>isdn0..isdn3, but when I try to launch ipppd, it tells me there must be at
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>least ippp0 configured (???) Does it means i have to configure interfaces
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>twice (one time for ipppX and other for isdnX)?
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No.
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Here is what happened: You named your net interfaces isdn0..isdn3 and did not use the pppbind option. Now isdnctrl has no clue that it should connect those interfaces to any /dev/ippp* .
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If you name your net interfaces ippp0..ippp3, then isdnctrl _automatically_ recognizes (by the name of those interfaces) that those should be connected to the /dev/ippp* . It does it (if I'm not wrong about that default behavior) when data arrives by connecting a net interface to the first available /dev/ippp* .
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Let's say if data arrives on net interface ippp3, it tries to connect it to /dev/ippp0, if that is available. If not (already another connection going on?), it tries /dev/ippp1, and so on.
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As you have two ipppd's with different options running that is not what you want, because you can never tell in advance which data will be answered by which ipppd.
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No matter how the name of your net interfaces is, if you use the "isdnctrl pppbind" option, you can tell isdnctrl to _always_ connect some netinterface with some /dev/ippp* . E.g.:
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isdnctrl pppbind isdn3 2
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tells isdnctrl to always put data from net interface isdn3 to /dev/ippp2.
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That is very handy, if you want to have a special ipppd lurking on /dev/ippp2 that should get all that traffic from isdn3.
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Isdnctrl acts like a switch board.
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Default behaviour (using net interfaces ippp0 and ippp1): =========================================================
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Kernel---------+
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Net interface ippp0 ippp1 (isdnctrl addif ippp*)
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Isdnctrl (by default, to next available device
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=> no isdnctrl pppbind necessary)
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Device /dev/ippp0 /dev/ippp1 /dev/ippp2 /dev/ippp3
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ipppd ipppd ipppd ipppd
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Default behaviour (using net interfaces isdn0, isdn1, isdn2, isdn3): ====================================================================
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Kernel------+----------+----------+
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| | | | Net interface isdn0 isdn1 isdn2 isdn3 (isdnctrl addif ippp*)
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isdnctrl (no connection from isdn* to any /dev/ippp*,
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because: name of net interface is not "ippp*")
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Device /dev/ippp0 /dev/ippp1 /dev/ippp2 /dev/ippp3
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ipppd ipppd ipppd ipppd
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Behavior using "isdnctrl pppbind" (A):
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======================================
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Kernel------+----------+----------+
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| | | | Net interface isdn0 isdn1 isdn2 isdn3 (isdnctrl addif isdn*)
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| Isdnctrl +-------+ (isdnctrl pppbind isdn3 2)
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| Device /dev/ippp0 /dev/ippp1 /dev/ippp2 /dev/ippp3
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ipppd ipppd ipppd ipppd
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Behavior using "isdnctrl pppbind" (A):
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======================================
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Kernel------+----------+----------+
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| | | | Net interface isdn0 isdn1 isdn2 isdn3 (isdnctrl addif isdn*)
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| Isdnctrl +-------+ (isdnctrl pppbind isdn2 1)
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Device /dev/ippp0 /dev/ippp1 /dev/ippp2 /dev/ippp3
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ipppd ipppd ipppd ipppd
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I hope that's correct. Please correct me if I'm wrong...
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Bye,
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Matthias
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**************************************************************** Matthias He<48>ler Email: hessler@wi-inf.uni-essen.de Gelsenkirchener Str. 67 Tel. : 0201-8915964 45141 Essen Fax. : 0201-8915965 ****************************************************************
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