hi i forgot to add that as for the PPPOE model the downstream ISP self provision the ADSL services with the NAS and Radius
On Sun, Oct 2, 2011 at 10:47 PM, K bharathan <[email protected]> wrote: > > > On Sun, Oct 2, 2011 at 2:48 PM, Arie Vayner (avayner) > <[email protected]>wrote: > >> 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: [email protected] >> [mailto:[email protected]] On Behalf Of K bharathan >> Sent: Sunday, October 02, 2011 11:40 >> To: [email protected] >> 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 >> _______________________________________________ >> cisco-nsp mailing list [email protected] >> https://puck.nether.net/mailman/listinfo/cisco-nsp >> archive at http://puck.nether.net/pipermail/cisco-nsp/ >> > > thanks > > but what is the difference between regular PPPOE and L2TP; it seems i've to > get more clarity from SP; but this given VLAN doe sn't have any IP; find > difficulty to set a gw for > the PPPoe server (NAS on cisco 2900 ISR router)sitting in the LAN > > > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
