PPPoE to multiple ISP on same network card/DSL modem

Hi, I was wondering, Is it possible to have multiple PPPoE sessions open to
different ISPs on a single network card via single DSL Modem. I can connect
to both ISPs one at a time, but is it possible to connect to both of them
and have multiple IP address on one network card. If I can I can figure out
routing my self but I don't know how I would connect to both ISPs at the
same time.

pointers to doc might be helpful.

I am running RH7.3

cheers
Haider



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Haider Kazmi schrieb:
> Hi, I was wondering, Is it possible to have multiple PPPoE sessions open to
> different ISPs on a single network card via single DSL Modem. I can connect
> to both ISPs one at a time, but is it possible to connect to both of them
> and have multiple IP address on one network card. If I can I can figure out
> routing my self but I don't know how I would connect to both ISPs at the
> same time.
>
> pointers to doc might be helpful.
>
> I am running RH7.3
>
> cheers
> Haider
>
>
>
> ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==----
> http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
> ----= East and West-Coast Server Farms - Total Privacy via Encryption =----

Yes should be possible because you and your ISP-AC are addressed by the
MAC-Address and every PPPoE connection got a unique PPP_SID. You should
only update your routing table what traffic to send over which ISP. The
IP-Addresses are only for routing purposes because the ISP is talked to
with the MAC-Address of his AC and the PPP_SID.

Thanks for the post. Single network card and two ip setting schemes
from two different ISP?

Mr. Daniel Lopes, can you please explain a little bit ... like routing
issues in two different network via single network interface? Do I have
to use some kind of routing protocol or running defaultless or some
kind of conditional routing? How does pppd handle this case?

Thanks in advance.

Raqueeb Hassan
Bangladesh

The ADSL routers all seem to support this, but apparently it is not
possible due to bandwidth restrictions. I have asked a similar question
quite a time ago, and never really found a conclusive answer.

I also wondered if two adsl routers could share the same line. The only
answer I got was "No" from someone who never tried it!

Obviously all my attempts at any of this failed completely!

On 10 Apr 2005 21:02:06 -0700, Raqueeb Hassan <(E-Mail Removed)> wrote:
> Thanks for the post. Single network card and two ip setting schemes
> from two different ISP?
>
> Mr. Daniel Lopes, can you please explain a little bit ... like routing
> issues in two different network via single network interface? Do I have
> to use some kind of routing protocol or running defaultless or some
> kind of conditional routing? How does pppd handle this case?
>
> Thanks in advance.
>
> Raqueeb Hassan
> Bangladesh

Not sure how the multiple pppoe connections are established to specific
ISPs on same dsl modem. Here in the states we can usually only have 1
pppoe connection on each phone line. Even if we get a block of static
public IPs from an ISP, they are routed through the single pppoe
connection.

But the routing for multiple connections can be anything from relatively
simple to complex. Host or network specific routing (for mail or news
server, etc.) could use remote IP of ppp0 or ppp1 as gateway. For more
complicated dynamic routing (load balancing or backup) see Adv-Routing
HOWTO. It is basically done similar to ethernet, but using the ppp0 or
ppp1 device. If there is not some other config to set the special routing
automatically, it can be altered from /etc/ppp/ip-up (or ip-up.local),
which runs whenever pppd gets a new IP.

Coenraad Loubser wrote:
> The ADSL routers all seem to support this, but apparently it is not
> possible due to bandwidth restrictions. I have asked a similar
question
> quite a time ago, and never really found a conclusive answer.
>
> I also wondered if two adsl routers could share the same line. The
only
> answer I got was "No" from someone who never tried it!

Regardless of the technology used to connect to your service provider,
keep in mind that you are, indeed, connecting to a _service_provider_.
You are connecting to a service which they provide You are a node
(or stub) on _their_ network.

Re: PPPoE, the protocol and technology to support multiple
(independent) sessions is available, but that does not mean that the
service is provided. Some ISPs do not offer this service to end users
at all, some provide it as a special (ie., more $) service, and many
local/retail ISPs use it themselves to support their service (single
session) subscribers.

Some providers require logon/authentication similar to dial-up and
allow/limit/disallow multiple logons.

The OP's question, like most such/similar questions are almost always
determined by the provider's services and access hardware. Doubt
(though it is possible) they have multiple providers using his LEC's
facilities that would provide easy/transparent sessions and
connections. He needs to contact whoever provides the dsl line/dslam
hardware (ie., the telco and service providers).

There is little you can do at your end alone to milk greater bandwidth
and/or reliability out of a connection that the service provider
controls. If you want more, be prepared to pay more.

You can google something like:
pppoe multiple session
and find a number of reasonably good hits. Like:

http://publib.boulder.ibm.com/infoce...usingpppoe.htm
http://publib.boulder.ibm.com/infoce...redbacksms.htm
http://as.efficient.com/support/Tang...tSessions.html

You can $ man pppoe and have rfc2516 handy:
http://www.faqs.org/rfcs/rfc2516.html
to get a better idea what is involved.

This should provide many ideas for further googling if you wish to get
into the details.

http://www.cisco.com/en/US/tech/tk17...ocol_home.html

hth,
prg

Haider Kazmi schrieb:
> Hi, I was wondering, Is it possible to have multiple PPPoE sessions open to
> different ISPs on a single network card via single DSL Modem. I can connect
> to both ISPs one at a time, but is it possible to connect to both of them
> and have multiple IP address on one network card. If I can I can figure out
> routing my self but I don't know how I would connect to both ISPs at the
> same time.
>
> pointers to doc might be helpful.
>
> I am running RH7.3
>
> cheers
> Haider
>
>
>
> ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==----
> http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
> ----= East and West-Coast Server Farms - Total Privacy via Encryption =----

I took again a look at the infrastructure and must revise my answer.
You will likely need a telephone line for each Momdem an so for each
connection. And a Ethernet NIC for each Modem but then the pppd should
be able to bind to the exact NIC for each connection simultaneously.

Modem --- DSLAM --- DSLAC

That´s for one connection

Modem1 --- | | --- DSLAC ISP1
| DSLAM |
Modem2 --- | | --- DSLAC ISP2

One Telephone Company two Providers

Modem1 --- DSLAM1 --- DSLAC ISP1

Modem2 --- DSLAM2 --- DSLAC ISP2

Two Telephone Companies two Providers

Modem1 --- DSLAM1 --- |
| DSLAC one Provider but two Accounts
Modem2 --- DSLAM2 --- |

Two Telephone Companies one Provider but two Accounts

So should the infrastructure look like if I´m not totally wrong.

Coenraad Loubser wrote:

> The ADSL routers all seem to support this, but apparently it is not
> possible due to bandwidth restrictions. I have asked a similar question
> quite a time ago, and never really found a conclusive answer.
>
> I also wondered if two adsl routers could share the same line. The only
> answer I got was "No" from someone who never tried it!

If you've got two IPs, you can use two "routers" on on ADSL or cable modem.
Not sure how you'd handle issues such as PPPoE.

Haider Kazmi <(E-Mail Removed)> wrote:

> Hi, I was wondering, Is it possible to have multiple PPPoE sessions open
> to different ISPs on a single network card via single DSL Modem.

In general this is possible, but it must be supported by
your access provider's equipment (Access Concentrator)
also. Depending on this equipment it might be necessary
that each PPPoE session originates from a *unique* MAC
address(1).

Ask your *access* provider whether they support this.
If your access provider supports multiple sessions,
then you can start to tackle pppoe issues (eg. how
to start two sessions on the same NIC).

However please note that this does not increase your
bandwidth, both PPPoE sessions share the available
bandwidth of your DSL line. If you want to double
your bandwidth you need two DSL lines and two DSL
modems.


Ciao, Horst


(1) I've to admit that I was not able to create another
(virtual) ethernet interface on my NIC with a *different*
MAC address than the one of the phy. interface. So for
this it might be necessary to use two NICs (this might
also ease the pppoe setup).
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