The IP Over NBMA (ION) Archive

["Arun Viswanathan" <arunv@VNET.IBM.COM>]

Ohta-San,

> In the global Internet, where the scalability is the problem,
> there is no such thing as egress routers.

What we mean by egress is clearly identified in the draft. Aggregation
provided by these egresses is what makes ARIS scalable to large internet.

> > 10. TTL Decrement
> >
> >    In order to comply with the requirements for IPv4 routers, the IP
> >    datagram Time-To-Live (TTL) field must be decremented on each hop it
> >    traverses [9].
>
> Wrong.
>
> TTL decrement is a requirement for a packet relay, not for a cell relay.

That's precisely the point :-). It depends on how you view the ISR
(TSR, CSR..): as a router or a switch. But it's  certainly visible as
a router outside the switched cloud.
Regards,
-arun

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