23 May
2017
23 May
'17
5:52 p.m.
Marius, you're quite correct, it won't find some of the gateways that
really should be deleted, but it will find some of them that should,
and it's my feeling that some is better than none.
Right now it's finding 45 out of 432 unreachable, and if those are
confirmed as down by being unreachable for some time (perhaps a few
months?), I think that's a little too high a percentage. Better to have
the statistics to work from rather than just guessing.
- Brian
On Wed, May 24, 2017 at 01:41:49AM +0300, Marius Petrescu wrote:
I don't think this is feasible in some cases.
1. It assumes that a ICMP unreachable is sent back. This is not always the
case since there may be routers on the way that block ICMP.
2. On dynamic hosts, if the IP is reallocated, you may target a valid active
IP, and no ICMP unreachable will be returned.
My $0.02
Marius, YO2LOJ