[PLUG] How to detect ppp address change remotely?

Bill Barry bill at billbarry.org
Sun Mar 18 04:26:55 UTC 2012


On Sat, Mar 17, 2012 at 9:09 PM, Tom Sharples <tsharples at qorvus.com> wrote:
> Neither arp not ip n show the ppp0 address on either router, probably
> because of the noarp option being selected (don't think I have control over
> that but will check).  Ifconfig does of course, but that only helps on the
> gateway router, not the downstream ones. And as mentioned before, traceroute
> just skips the local IP ppp0 ip address:
>
> Hoku_R2:~# traceroute yahoo.com
> traceroute to yahoo.com (98.139.183.24), 30 hops max, 40 byte packets
>  1  172.16.181.1 (172.16.181.1)  34.889 ms  1.059 ms  1.022 ms <---gateway
> node
>  2  132.sub-66-174-202.myvzw.com (66.174.202.132)  61.664 ms  79.163 ms
>  67.642 ms <---verizon tower gateway
>
> At position 2 above I would expect to see the ppp0 address:
>
> ppp0      Link encap:Point-to-Point Protocol
>          inet addr:72.10.xxx.xx  P-t-P:66.174.202.132  Mask:255.255.255.255
>          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
>
> but no joy.
>
> Tom S.

How about tcptraceroute or traceroute -T?

Bill



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