First time I've come across this problem.

We have a customer who is running Plesk v2. As soon as he logs into the Plesk 'admin' browser panel the lag/pings blow out to ridiculous levels.. as soon as he logs out of Plesk web interface, it goes back to normal.

Example..

before logging into Plesk....

Pinging 203.46.**.** with 32 bytes of data:

Reply from 203.46.**.** : bytes=32 time=40ms TTL=244
Reply from 203.46.**.** : bytes=32 time=40ms TTL=244
Reply from 203.46.**.** : bytes=32 time=60ms TTL=244
Reply from 203.46.**.** : bytes=32 time=50ms TTL=244

Ping statistics for 203.46.**.** :
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 40ms, Maximum = 60ms, Average = 47ms

-------------------------------------------------------

after logging into Plesk....

Pinging 203.46.**.** with 32 bytes of data:

Request timed out.
Request timed out.
Request timed out.
Reply from 203.46.**.** : bytes=32 time=531ms TTL=244

Ping statistics for 203.46.**.** :
Packets: Sent = 4, Received = 1, Lost = 3 (75% loss),
Approximate round trip times in milli-seconds:
Minimum = 531ms, Maximum = 531ms, Average = 132ms

C:\>ping 203.46.**.**

Pinging 203.46.**.** with 32 bytes of data:

Request timed out.
Reply from 203.46.**.** : bytes=32 time=311ms TTL=244
Reply from 203.46.**.** : bytes=32 time=781ms TTL=244
Reply from 203.46.**.** : bytes=32 time=821ms TTL=244

Ping statistics for 203.46.**.** :
Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),
Approximate round trip times in milli-seconds:
Minimum = 311ms, Maximum = 821ms, Average = 478ms


and from another location,

--//--
64 bytes from 203.46.**.** : icmp_seq=2 ttl=246 time=12359.6 ms
64 bytes from 203.46.**.** : icmp_seq=3 ttl=246 time=12112.6 ms
64 bytes from 203.46.**.** : icmp_seq=4 ttl=246 time=11138.7 ms
64 bytes from 203.46.**.** : icmp_seq=5 ttl=246 time=10885.7 ms
64 bytes from 203.46.**.** : icmp_seq=6 ttl=246 time=9937.5 ms
64 bytes from 203.46.**.** : icmp_seq=7 ttl=246 time=8986.7 ms
--//--

--- 203.46.**.** ping statistics ---
23 packets transmitted, 20 packets received, 13% packet loss
round-trip min/avg/max = 661.8/6873.7/12896.3 ms


This has been escalated, but just wondered if anyone here had a quick clue.. we've checked all the *possible* things that might cause this, and there is no immediate clue... no server load, no network issues..


Cheers..

 

 

 

 

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