I don't have that much experience with PPPoA protocol, but I was wondering if it is some way possible to do bridging on the DSL modem using PPPoA just as in PPPoE?
When using ADSL with PPPoE you can setup the modem to act as a bridge, it will bridge between the pstn and Ethernet. Therefore a Cisco router can use PPPoE encapsulation and authentication to connect. I would like to find a way to do a similar thing, where my router connected to the modem will have a public IP address and something like a dialer interface but without ATM interface present just Ethernet.
There are many other modems/routers such a Dlink, 3com and others which offer pure bridge feature with PPPoA connection. If you use the bridge mode, the router will connect to the internet but instead of keeping the IP received from the ISP, it will pass it on to the device (PC) connected on the Ethernet interface of the router. I don't understand why Cisco routers doesn't support that.
Are you sure you're talking about PPPoA and not PPPoE ? The former is not being very used anymore, beside if things were to work as you say, router should be "master" side pppoe, something complicated and probably unnecessary, considering Cisco outer has the best impletantion fo nat and everything works anyway.
Yes - I am very sure it's PPPoA. The ISP here doesn't offer PPPoE and all the implementations are based on PPPoA. There are other routers like I said, works fine with this by doing the PPPoA bridge connection and the PC gets the IP address without making any dialup connection. At times you don't want to use NAT on the device for e.g. if you want to connect a PIX device with the ADSL and need the Public IP to be assiged on the WAN interface of the box then you are stuck? :)
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