PPPoE server (high traffic in WDM network)

[muhammad usman]

Hi,

I've little off topic suggestion regarding network design.


The solution you are implementing will mean to make hundreds of users share the same broadcast domain. As all your FTTH and other DSLAMS would be working in bridge mode.
This scenerio is not safe as if anyone of your clients will start his own pppoe server you will be in strange trouble, there can be other issues too.


I guess your DSLAMs must have built in pppoe support and radius client, if its there then every port of dslams can be separate broadcast domain. This will cause you extra routing management (depending upon your scsnerio)


In case your DSLAMS have no pppoe feature then i would suggest you to at least put every DSLAM's uplink port in deparate VLAN and connect pppoe server using trunk port or multiple single ports.


And before implementing this solution consult your DSLAM vendor cause ive observed problems in ipdslams when used in bridge/transperant mode.


Regards
usman


--- On Wed, 7/15/09, Michelle Konzack <bsd4michelle at tamay-dogan.net> wrote:

From: Michelle Konzack <bsd4michelle at tamay-dogan.net>
Subject: PPPoE server (high traffic in WDM network)
To: freebsd-questions at freebsd.org, freebsd-isp at freebsd.org
Date: Wednesday, July 15, 2009, 11:40 PM

Hello,

I am using since over  10 years  Debian  GNU/Linux  and  3 years  longer
NetBSD. Also I have a running PicoBSD box.

Now I have a problem more grave...

I am ongoing to install a CWDM (1GE) and DWDM  (10GE)  network  for  the
Alvarion BreezeACCESS VL (38 base stations) and more then  200  Iskratel
FTTH DSLAMS of 96 ports (each with 100MBit, but only one  1GE  Upstream)
each.

What I now need are a PPPoE Severs (round-robin and loadbalancing) which
must work using FreeRadius and PostgreSQL.

There was someone on the <debian-isp> which  has  suggested  me  to  use
FreeBSD, because the PPPoE it is already build to  authenticate  against
Radius.

So, what I like to know is, if I have a 1GE and 10GE network,  how  many
clients can  one  PPPoE  Server  handel  and  what  are  the  CPU/Memory
requirements?

There is a little problem to get small but  reliabel  Servers  with  TWO
10GE interfaces.

I think, consumer mainboards are not suitabel even someone told me under
Linux, I need 2 MHz CPU-Speed and 2 MByte of Memory per client...

Please note, that I am ongoing ISP with over  150.000  customers  in  DE
between Freiburg and Karlsruhe (Baden-Württemberg)  and  using  consumer
mainboards is NOT reliabel since in the last 6 years I lost at least  20
per year in 280 Low-Cost Servers.

A "Sun Fire X4100M2" would be more reliabel... but even the smallest CPU
would be overkill because the machine has only 1GE interfaces.

Any suggestions?

Note 1: Even if I use a Sun Fire, I would prefer a microBSD
        running from an industrial SD/CF card.

Note:  Please do NOT CC me, I am on the list and read it...

Thanks, Greetings and nice Day/Evening
    Michelle Konzack
    Systemadministrator
    Tamay Dogan Network
    Debian GNU/Linux Consultant

-- 
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