> On Jan 6, 2026, at 1:04 PM, Marco Moock <[email protected]> wrote: > > Am 06.01.2026 um 13:02:18 Uhr schrieb Philip Prindeville: > >> Packets Pings >> Host Loss% Snt Last Avg Best Wrst >> StDev >> 1. (waiting for reply) >> 2. 10.170.203.249 64.9% 57 69.9 255.3 66.8 2003. >> 488.3 >> 3. 10.164.160.61 82.1% 57 68.9 330.0 66.4 1930. >> 605.4 >> 4. ae2.er1.ord2.us.zip.zayo.com 64.9% 57 81.1 235.9 67.6 1857. >> 437.4 >> 5. (waiting for reply) >> 6. ae20.cr1.ord8.us.zip.zayo.com 91.1% 56 91.9 78.5 64.7 >> 91.9 12.11 > > And here is your issue - massive packet loss. >
A lot of core routers do random drop on ICMP to avoid denial-of-service attacks since ICMP isn't fastswitched (i.e. it takes the CPU to process the packets instead of ASICs). At least that was the case 20 years ago when I was at Cisco. -- Visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list.
