Re: IFF_RUNNING support for ppp interfaces?

[James Carlson <carlsonj@xxxxxxxxxxxxxxx>]

Joakim Tjernlund writes:
> I wonder how IFF_RUNNING is managed in recent pppd version(s). I very much 
> like  to
> use IFF_RUNNING to see if the link working in both ends.

For most implementations, IFF_RUNNING cannot be controlled by anything
in user space (such as pppd).  Instead, it's set/cleared by the
kernel's PPP driver.

Defining "working" is difficult.  Usually, the IFF_RUNNING flag is set
if the link is either a demand link waiting for activity or if there's
an active serial link underneath the connection, and IFF_UP is set
when IPCP successfully negotiates addresses.

-- 
James Carlson         42.703N 71.076W         <carlsonj@xxxxxxxxxxxxxxx>
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