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Linux Networking Hardware/Software related, Modems, Internet connection sharing, IPTables etc.

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Old 06-23-2008   #1 (permalink)
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network ping problems
hi all,
can somebody tell me what is wrong with my ping analysis like this:

64 bytes from 192.168.1.1: icmp_seq=418 ttl=64 time=0.195 ms
64 bytes from 192.168.1.1: icmp_seq=419 ttl=64 time=0.212 ms
64 bytes from 192.168.1.1: icmp_seq=420 ttl=64 time=0.206 ms
64 bytes from 192.168.1.1: icmp_seq=421 ttl=64 time=0.206 ms
64 bytes from 192.168.1.1: icmp_seq=422 ttl=64 time=0.165 ms
64 bytes from 192.168.1.1: icmp_seq=423 ttl=64 time=0.194 ms
64 bytes from 192.168.1.1: icmp_seq=424 ttl=64 time=0.206 ms
64 bytes from 192.168.1.1: icmp_seq=425 ttl=64 time=0.205 ms
64 bytes from 192.168.1.1: icmp_seq=426 ttl=64 time=0.198 ms
64 bytes from 192.168.1.1: icmp_seq=427 ttl=64 time=17.7 ms
64 bytes from 192.168.1.1: icmp_seq=428 ttl=64 time=17.5 ms
64 bytes from 192.168.1.1: icmp_seq=429 ttl=64 time=16.8 ms
64 bytes from 192.168.1.1: icmp_seq=430 ttl=64 time=13.7 ms
64 bytes from 192.168.1.1: icmp_seq=431 ttl=64 time=12.8 ms
64 bytes from 192.168.1.1: icmp_seq=432 ttl=64 time=11.9 ms
64 bytes from 192.168.1.1: icmp_seq=433 ttl=64 time=11.1 ms
64 bytes from 192.168.1.1: icmp_seq=434 ttl=64 time=20.8 ms
64 bytes from 192.168.1.1: icmp_seq=435 ttl=64 time=18.9 ms
64 bytes from 192.168.1.1: icmp_seq=436 ttl=64 time=17.8 ms
64 bytes from 192.168.1.1: icmp_seq=437 ttl=64 time=20.2 ms
64 bytes from 192.168.1.1: icmp_seq=438 ttl=64 time=12.1 ms
64 bytes from 192.168.1.1: icmp_seq=439 ttl=64 time=11.4 ms
64 bytes from 192.168.1.1: icmp_seq=440 ttl=64 time=14.0 ms
64 bytes from 192.168.1.1: icmp_seq=441 ttl=64 time=13.3 ms
64 bytes from 192.168.1.1: icmp_seq=442 ttl=64 time=12.5 ms
64 bytes from 192.168.1.1: icmp_seq=443 ttl=64 time=11.4 ms
64 bytes from 192.168.1.1: icmp_seq=444 ttl=64 time=21.0 ms
64 bytes from 192.168.1.1: icmp_seq=445 ttl=64 time=19.2 ms
64 bytes from 192.168.1.1: icmp_seq=446 ttl=64 time=18.2 ms
64 bytes from 192.168.1.1: icmp_seq=447 ttl=64 time=17.3 ms
64 bytes from 192.168.1.1: icmp_seq=448 ttl=64 time=16.4 ms
64 bytes from 192.168.1.1: icmp_seq=449 ttl=64 time=15.4 ms
64 bytes from 192.168.1.1: icmp_seq=450 ttl=64 time=13.5 ms
64 bytes from 192.168.1.1: icmp_seq=451 ttl=64 time=12.5 ms
64 bytes from 192.168.1.1: icmp_seq=452 ttl=64 time=11.5 ms
64 bytes from 192.168.1.1: icmp_seq=453 ttl=64 time=21.4 ms
64 bytes from 192.168.1.1: icmp_seq=454 ttl=64 time=20.3 ms
64 bytes from 192.168.1.1: icmp_seq=455 ttl=64 time=17.4 ms
64 bytes from 192.168.1.1: icmp_seq=456 ttl=64 time=16.4 ms
64 bytes from 192.168.1.1: icmp_seq=457 ttl=64 time=15.6 ms
64 bytes from 192.168.1.1: icmp_seq=458 ttl=64 time=15.5 ms
64 bytes from 192.168.1.1: icmp_seq=459 ttl=64 time=14.9 ms
64 bytes from 192.168.1.1: icmp_seq=460 ttl=64 time=13.8 ms
64 bytes from 192.168.1.1: icmp_seq=461 ttl=64 time=12.9 ms
64 bytes from 192.168.1.1: icmp_seq=462 ttl=64 time=11.9 ms
64 bytes from 192.168.1.1: icmp_seq=463 ttl=64 time=21.7 ms
64 bytes from 192.168.1.1: icmp_seq=464 ttl=64 time=19.8 ms
64 bytes from 192.168.1.1: icmp_seq=465 ttl=64 time=13.3 ms
64 bytes from 192.168.1.1: icmp_seq=466 ttl=64 time=12.0 ms
64 bytes from 192.168.1.1: icmp_seq=467 ttl=64 time=10.9 ms
64 bytes from 192.168.1.1: icmp_seq=468 ttl=64 time=20.8 ms
64 bytes from 192.168.1.1: icmp_seq=469 ttl=64 time=18.8 ms
64 bytes from 192.168.1.1: icmp_seq=470 ttl=64 time=18.0 ms
64 bytes from 192.168.1.1: icmp_seq=471 ttl=64 time=16.9 ms
64 bytes from 192.168.1.1: icmp_seq=472 ttl=64 time=16.0 ms
64 bytes from 192.168.1.1: icmp_seq=473 ttl=64 time=15.1 ms
64 bytes from 192.168.1.1: icmp_seq=474 ttl=64 time=14.2 ms
64 bytes from 192.168.1.1: icmp_seq=475 ttl=64 time=12.1 ms
64 bytes from 192.168.1.1: icmp_seq=476 ttl=64 time=12.6 ms
64 bytes from 192.168.1.1: icmp_seq=477 ttl=64 time=11.2 ms
64 bytes from 192.168.1.1: icmp_seq=478 ttl=64 time=21.1 ms
64 bytes from 192.168.1.1: icmp_seq=479 ttl=64 time=20.0 ms
64 bytes from 192.168.1.1: icmp_seq=480 ttl=64 time=19.1 ms
64 bytes from 192.168.1.1: icmp_seq=481 ttl=64 time=18.2 ms
64 bytes from 192.168.1.1: icmp_seq=482 ttl=64 time=17.2 ms
64 bytes from 192.168.1.1: icmp_seq=483 ttl=64 time=17.2 ms
64 bytes from 192.168.1.1: icmp_seq=484 ttl=64 time=20.2 ms
64 bytes from 192.168.1.1: icmp_seq=485 ttl=64 time=12.6 ms
64 bytes from 192.168.1.1: icmp_seq=486 ttl=64 time=12.4 ms
64 bytes from 192.168.1.1: icmp_seq=487 ttl=64 time=11.7 ms
64 bytes from 192.168.1.1: icmp_seq=488 ttl=64 time=20.6 ms
64 bytes from 192.168.1.1: icmp_seq=489 ttl=64 time=18.6 ms
64 bytes from 192.168.1.1: icmp_seq=490 ttl=64 time=13.6 ms
64 bytes from 192.168.1.1: icmp_seq=491 ttl=64 time=16.6 ms
64 bytes from 192.168.1.1: icmp_seq=492 ttl=64 time=16.8 ms
64 bytes from 192.168.1.1: icmp_seq=493 ttl=64 time=15.8 ms
64 bytes from 192.168.1.1: icmp_seq=494 ttl=64 time=21.5 ms
64 bytes from 192.168.1.1: icmp_seq=495 ttl=64 time=13.7 ms
64 bytes from 192.168.1.1: icmp_seq=496 ttl=64 time=20.9 ms
64 bytes from 192.168.1.1: icmp_seq=497 ttl=64 time=16.7 ms
64 bytes from 192.168.1.1: icmp_seq=498 ttl=64 time=16.8 ms
64 bytes from 192.168.1.1: icmp_seq=499 ttl=64 time=20.8 ms
64 bytes from 192.168.1.1: icmp_seq=500 ttl=64 time=14.9 ms
64 bytes from 192.168.1.1: icmp_seq=501 ttl=64 time=11.1 ms
64 bytes from 192.168.1.1: icmp_seq=502 ttl=64 time=20.9 ms
64 bytes from 192.168.1.1: icmp_seq=503 ttl=64 time=12.0 ms
64 bytes from 192.168.1.1: icmp_seq=504 ttl=64 time=12.2 ms
64 bytes from 192.168.1.1: icmp_seq=505 ttl=64 time=19.8 ms
64 bytes from 192.168.1.1: icmp_seq=506 ttl=64 time=12.7 ms
64 bytes from 192.168.1.1: icmp_seq=507 ttl=64 time=13.8 ms
64 bytes from 192.168.1.1: icmp_seq=508 ttl=64 time=14.4 ms
64 bytes from 192.168.1.1: icmp_seq=509 ttl=64 time=15.4 ms
64 bytes from 192.168.1.1: icmp_seq=510 ttl=64 time=13.2 ms
64 bytes from 192.168.1.1: icmp_seq=511 ttl=64 time=17.1 ms
64 bytes from 192.168.1.1: icmp_seq=512 ttl=64 time=21.2 ms
64 bytes from 192.168.1.1: icmp_seq=513 ttl=64 time=22.1 ms
64 bytes from 192.168.1.1: icmp_seq=514 ttl=64 time=29.1 ms
64 bytes from 192.168.1.1: icmp_seq=515 ttl=64 time=17.3 ms
64 bytes from 192.168.1.1: icmp_seq=516 ttl=64 time=25.0 ms
64 bytes from 192.168.1.1: icmp_seq=517 ttl=64 time=28.9 ms
64 bytes from 192.168.1.1: icmp_seq=518 ttl=64 time=13.2 ms
64 bytes from 192.168.1.1: icmp_seq=519 ttl=64 time=13.2 ms
64 bytes from 192.168.1.1: icmp_seq=520 ttl=64 time=13.9 ms
64 bytes from 192.168.1.1: icmp_seq=521 ttl=64 time=13.4 ms
64 bytes from 192.168.1.1: icmp_seq=522 ttl=64 time=14.4 ms
64 bytes from 192.168.1.1: icmp_seq=523 ttl=64 time=20.3 ms
64 bytes from 192.168.1.1: icmp_seq=524 ttl=64 time=19.8 ms
64 bytes from 192.168.1.1: icmp_seq=525 ttl=64 time=18.3 ms
64 bytes from 192.168.1.1: icmp_seq=526 ttl=64 time=19.4 ms
64 bytes from 192.168.1.1: icmp_seq=527 ttl=64 time=18.4 ms
64 bytes from 192.168.1.1: icmp_seq=528 ttl=64 time=17.6 ms
64 bytes from 192.168.1.1: icmp_seq=532 ttl=64 time=0.217 ms
64 bytes from 192.168.1.1: icmp_seq=533 ttl=64 time=0.183 ms
64 bytes from 192.168.1.1: icmp_seq=534 ttl=64 time=0.200 ms
64 bytes from 192.168.1.1: icmp_seq=535 ttl=64 time=0.209 ms
64 bytes from 192.168.1.1: icmp_seq=536 ttl=64 time=0.164 ms
64 bytes from 192.168.1.1: icmp_seq=537 ttl=64 time=0.201 ms
64 bytes from 192.168.1.1: icmp_seq=538 ttl=64 time=0.203 ms
64 bytes from 192.168.1.1: icmp_seq=539 ttl=64 time=0.200 ms
64 bytes from 192.168.1.1: icmp_seq=540 ttl=64 time=0.210 ms
64 bytes from 192.168.1.1: icmp_seq=541 ttl=64 time=0.195 ms
64 bytes from 192.168.1.1: icmp_seq=542 ttl=64 time=0.164 ms
64 bytes from 192.168.1.1: icmp_seq=543 ttl=64 time=0.206 ms

as you can see that suddenly the response time can reach until > 10 ms from < 0 ms.
can someone have any idea, what is happening?

thx.
mufea is offline   Reply With Quote
Old 06-23-2008   #2 (permalink)
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let us know your network infrastructure so that we can suggest you.
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Old 06-24-2008   #3 (permalink)
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my network topology is simply, all PC connected to switch, include my PC & that gateway.
I can ping without no more lose to any PC, only to the gateway.
Are the symtom is in PCI slot of the gateway PC?

thx.
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Old 06-24-2008   #4 (permalink)
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Can you ping anything beyond this host? Outside your network would be best. The reason I ask is there is a lot happening on the internet. Because you can ping local machine easily and just having issues with the gateway it could be because the gateway is busy answering/dropping packets from the internet. Ping packets have a very low priority thus they sit until the device has time to answer the request or they time out.
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