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Re: PATCH 2.2.14 net/core/dev.c [Many interfaces issue]

To: Marcell GAL <cell@xxxxxxxxxxxxxxxxx>, "netdev@xxxxxxxxxxx" <netdev@xxxxxxxxxxx>
Subject: Re: PATCH 2.2.14 net/core/dev.c [Many interfaces issue]
From: Ben Greear <greearb@xxxxxxxxxxxxxxx>
Date: Tue, 16 May 2000 18:36:31 -0700
Organization: Candela Technologies
References: <3921B53C.D0C0A237@sch.bme.hu>
Sender: owner-netdev@xxxxxxxxxxx
Marcell GAL wrote:
> 
> Hi Guys,
> 
> Having many ATM VCs, each having its own ethernet segment inside
> I am exactly in the same situation as the VLAN guys.
> (the kernel code for rfc2684/~1483/ bridged encapsulation is coming out
> soon,
> those who want an early look /perhaps audit/, please write to me)

Does that mean we will be able to do cool things like bridge a PVC to/from
a VLAN?

> My users want many interfaces, they want to ifconfig them, see counters,
> set MAC addresses, they want whatever they do with their physical
> ethernet interfaces. Several hundred interfaces per physical ATM card.
> (still less than 409x VLANs though :)

Heh, if you bridged a single PVC to a single VLAN (ie PVCoE), then you
could have twice as many interfaces!! :)

> ;)  I do not see a reason to restrict her.
> Besides having a longer (but acceptable for 99%) creation and listing
> time for interfaces
> the only remarkable thing was /proc/sys/net/ipv4/conf.
> (in our case only 145 entries were accessible, so we had to use the
> conf/default directory
> -ugly,eh?- before creating the devices and forget about changing those
> values thereafter)

Why is the limit 145...is that how many can fit into a single 4k 'block'
in the proc FS?

> Sorry to stir this again, maybe I just want to hear that large number of
> traditional interfaces is OK for now until we get back to this at 2.5

If you, or anyone else, can think up a scheme that fixes this perceived
problem, please let the list or me know so I can consider changes to
the VLAN code too...

Enjoy,
Ben

-- 
Ben Greear (greearb@xxxxxxxxxxxxxxx)  http://www.candelatech.com
Author of ScryMUD:  scry.wanfear.com 4444        (Released under GPL)
http://scry.wanfear.com               http://scry.wanfear.com/~greear

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