RE: draft of a core protocol spec

>>         TTL In the absence of any recommended value in IEEE 802.17, 
>>             the TTL SHOULD be set to 255. 
>>lb] There is no need (nor a standard way) to indicate TTL to the MAC. The
>>MAC can calculate it based on the DA
>
>There does not need to be a standard way of indicating the TTL to
>the MAC. That's an implementation issue.  However, that's irrelevant.
>If the MAC can insert the "correct" TTL, that's _probably_ all we
>need and I'll revise the spec to say that. One question, when a node
>is added to the ring, does the MAC update its notion of what TTL
>to use "quickly"?

There is *no* way to indicate TTL to the MAC. TTL is set internally by the MAC. And, yes, the MAC adjusts the TTL value as needed, including when topology changes.