On 11/16/15 06:23, Paul Jakma wrote:
> Also, are we talking regular point-to-point interfaces, is ARP even
> necessary on PtP? With PPP, peers usually exchange unicast address
> information with IPCP anyway, and there's no ARP protocol run I thought?
Correct; ARP doesn't exist on most point-to-point interfaces. The weird
exception is ATM point-to-multipoint, but the less said about that, the
better.
> So the ping would be a waste of time.
ping != ARP. The ping utility sends ICMP Echo messages. ICMP (and thus
ping) works fine on PPP, though I agree with you that using system("ping
...") from inside a routing daemon doesn't look right at all.
If ARP gets sent on broadcast type media through this mechanism, it's
purely by accident. The same accident that you'd trigger by sending a
unicast OSPF Hello.
Of course, if you really want ICMP Echo instead, you can get that pretty
easily without resorting to system().
--
James Carlson 42.703N 71.076W <[email protected]>
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