There's this thing called bufferbloat... On Wed, Dec 21, 2022 at 11:58 AM William Herrin <bill@herrin.us> wrote:
On Wed, Dec 21, 2022 at 9:10 AM Jason Iannone <jason.iannone@gmail.com> wrote:
Here's a question I haven't bothered to ask until now. Can someone please help me understand why I receive a ping reply after almost 5 seconds?
64 bytes from 4.2.2.2: icmp_seq=398 ttl=54 time=4915.096 ms 64 bytes from 4.2.2.2: icmp_seq=399 ttl=54 time=4310.575 ms 64 bytes from 4.2.2.2: icmp_seq=400 ttl=54 time=4196.075 ms 64 bytes from 4.2.2.2: icmp_seq=401 ttl=54 time=4287.048 ms 64 bytes from 4.2.2.2: icmp_seq=403 ttl=54 time=2280.466 ms 64 bytes from 4.2.2.2: icmp_seq=404 ttl=54 time=1279.348 ms 64 bytes from 4.2.2.2: icmp_seq=405 ttl=54 time=276.669 ms
Hi Jason,
This usually means a problem on the Linux machine originating the packet. It has lost the ARP for the next hop or something similar so the outbound ICMP packet is queued. The glitch repairs itself, briefly, releasing the queued packets. Then it comes right back.
Regards, Bill Herrin
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