Weird Ping Behavior
Posted: 19. Jul 2010, 21:48
When I try to ping an address on my corporate network, and I use the DNS name, the replies are erratic (lost packets, when there should be NONE) and have high latency (the reply says ~42ms, but the total time is HUGE).
This is what it looks like when just pinging the IP address - everything looks fine. Note the total time of 12k ms:
And here's what it looks like while pinging via a DNS name. Of particular note is the time of 58k ms, almost 5 TIMES the total time while pinging with just the IP address.
What's up with that? The individual RTT is consistent between the two pings...
This is what it looks like when just pinging the IP address - everything looks fine. Note the total time of 12k ms:
Code: Select all
rbellamy@DUMUZID ~> ping 10.69.2.11
PING 10.69.2.11 (10.69.2.11) 56(84) bytes of data.
64 bytes from 10.69.2.11: icmp_seq=1 ttl=62 time=42.2 ms
64 bytes from 10.69.2.11: icmp_seq=2 ttl=62 time=42.9 ms
64 bytes from 10.69.2.11: icmp_seq=3 ttl=62 time=42.0 ms
64 bytes from 10.69.2.11: icmp_seq=4 ttl=62 time=40.9 ms
64 bytes from 10.69.2.11: icmp_seq=5 ttl=62 time=41.7 ms
64 bytes from 10.69.2.11: icmp_seq=6 ttl=62 time=42.9 ms
64 bytes from 10.69.2.11: icmp_seq=7 ttl=62 time=41.3 ms
64 bytes from 10.69.2.11: icmp_seq=8 ttl=62 time=41.5 ms
64 bytes from 10.69.2.11: icmp_seq=9 ttl=62 time=42.1 ms
64 bytes from 10.69.2.11: icmp_seq=10 ttl=62 time=41.9 ms
64 bytes from 10.69.2.11: icmp_seq=11 ttl=62 time=41.2 ms
64 bytes from 10.69.2.11: icmp_seq=12 ttl=62 time=42.1 ms
64 bytes from 10.69.2.11: icmp_seq=13 ttl=62 time=49.8 ms
^C
--- 10.69.2.11 ping statistics ---
13 packets transmitted, 13 received, 0% packet loss, time 12023ms
rtt min/avg/max/mdev = 40.908/42.548/49.813/2.176 ms
Code: Select all
rbellamy@DUMUZID ~> ping test.local
PING test.local (10.69.2.11) 56(84) bytes of data.
64 bytes from 10.69.2.11: icmp_seq=1 ttl=62 time=40.7 ms
64 bytes from 10.69.2.11: icmp_seq=2 ttl=62 time=43.4 ms
64 bytes from 10.69.2.11: icmp_seq=3 ttl=62 time=41.6 ms
64 bytes from 10.69.2.11: icmp_seq=6 ttl=62 time=43.0 ms
64 bytes from 10.69.2.11: icmp_seq=7 ttl=62 time=42.3 ms
64 bytes from 10.69.2.11: icmp_seq=8 ttl=62 time=41.3 ms
64 bytes from 10.69.2.11: icmp_seq=9 ttl=62 time=42.8 ms
64 bytes from 10.69.2.11: icmp_seq=10 ttl=62 time=43.4 ms
64 bytes from 10.69.2.11: icmp_seq=11 ttl=62 time=43.6 ms
64 bytes from 10.69.2.11: icmp_seq=12 ttl=62 time=42.7 ms
64 bytes from 10.69.2.11: icmp_seq=13 ttl=62 time=42.1 ms
^C64 bytes from 10.69.2.11: icmp_seq=14 ttl=62 time=40.7 ms
--- test.local ping statistics ---
14 packets transmitted, 12 received, 14% packet loss, time 57559ms
rtt min/avg/max/mdev = 40.749/42.345/43.679/1.023 ms