Re: HDLC frames delivered over PWs

Hello Ignacio,

One comment,

> You still have the problem of delivering the I-frames to the remote
> LCCE reliably and in order. For that, this new fangled NSPs will need
> to implement some sort of reliable mechanism to deliver the I-frames
> and whatever other information may be needed (eg, XID contents, etc).
> This reliability and resequencing is not be provided by L2TP as is.
> At this point, you are looking at implementing something akin to LAPB
> to deliver this information. Any of the following alternatives could
> provide the required reordering and reliable delivery: RFC1663,
> RFC1151, Q.921, V.42 LAPM, etc. or you could use a much simpler ack
> based system.
>   
An option may be delivering L2TPv3 over TCP??, although it is not 
considered in RFC3931

Thanks,

Javi