[c-nsp] pppoe-link

[Arie Vayner (avayner)]

I am not completely sure about the PPPoE model you have as you mention 2
different things:
- L2TP
- VPLS

If you get a L2 circuit (VPLS) with no IP configured on it, and you
terminate PPPoE sessions on your router, then this is not L2TP, but
regular PPPoE.
PPPoE is a L2 protocol which runs directly over Ethernet and does not
require an IP layer (the customer does not get an IP address before the
PPP layer assigns it).

With L2TP you would have an IP based tunnel from the SP, while they
terminate the PPPoE session, and they would tunnel it to your LNS. In
that case the LAC (SP BRAS) has to have IP connectivity to your LNS
device.

Arie

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of K bharathan
Sent: Sunday, October 02, 2011 11:40
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] pppoe-link

| upstream ISP |------------>| Fibre Link |---------->| downstream ISP 
| (gw
rt) |

Fibre link (1 line) is divided into 3 VLANS
1 vlan for internet bandwidth (wan ip from upstream ISP
1 vlan for DSL bandwidth (wan ip from upstream ISP)
1 vlan (l2tp link) for PPPOE from their VPLS network; no wan ips on
this;

the link terminates at downstream ISP gw router

problem: there is no wan ip on the PPPoe link how a PPPoe server can  be
answering the DSL client; how can this particular link can be  connected
to the downstream ISP network; anybody has got any ideas ?
thanks
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