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i have just made crossover cable, and connected my desktop computer with laptop to test it, but i am experiencing high ping on laptop > desktop

desktop 10.10.10.1, laptop 10.10.10.2

pinging laptop from desktop

Reply from 10.10.10.2: bytes=32 time<1ms TTL=128
Reply from 10.10.10.2: bytes=32 time<1ms TTL=128
Reply from 10.10.10.2: bytes=32 time<1ms TTL=128
Reply from 10.10.10.2: bytes=32 time<1ms TTL=128

pinging desktop from laptop

Reply from 10.10.10.1: bytes=32 time<1ms TTL=128
Reply from 10.10.10.1: bytes=32 time=313ms TTL=128
Reply from 10.10.10.1: bytes=32 time<1ms TTL=128
Reply from 10.10.10.1: bytes=32 time=111ms TTL=128
Reply from 10.10.10.1: bytes=32 time=311ms TTL=128
Reply from 10.10.10.1: bytes=32 time<1ms TTL=128
Reply from 10.10.10.1: bytes=32 time=109ms TTL=128
Reply from 10.10.10.1: bytes=32 time=308ms TTL=128
Reply from 10.10.10.1: bytes=32 time=97ms TTL=128
Reply from 10.10.10.1: bytes=32 time=106ms TTL=128
Reply from 10.10.10.1: bytes=32 time=304ms TTL=128
Reply from 10.10.10.1: bytes=32 time<1ms TTL=128
Reply from 10.10.10.1: bytes=32 time=103ms TTL=128
Reply from 10.10.10.1: bytes=32 time=150ms TTL=128
Reply from 10.10.10.1: bytes=32 time=215ms TTL=128
Reply from 10.10.10.1: bytes=32 time=100ms TTL=128
Reply from 10.10.10.1: bytes=32 time=299ms TTL=128
Reply from 10.10.10.1: bytes=32 time=88ms TTL=128
Reply from 10.10.10.1: bytes=32 time=90ms TTL=128
Reply from 10.10.10.1: bytes=32 time=289ms TTL=128
Reply from 10.10.10.1: bytes=32 time=488ms TTL=128

(not related to above)
Ping statistics for 10.10.10.1: 
Packets: Sent = 34, Received = 34, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds: Minimum = 0ms, Maximum = 480ms, Average = 124ms

desktop is not under heavy load, i also connected desktop to router(as its usually connected) and pinged it with router software, and it responded with perfect 1ms

any ides what could be causing this ?

EDIT direct connection with straight cable - same results

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migrated from serverfault.com Jul 11 '13 at 11:15

This question came from our site for professional system and network administrators.

    
My first guess is the cable. –  lVlint67 Jul 11 '13 at 11:08
    
You made your own cable? Why? –  Tom O'Connor Jul 11 '13 at 11:14
    
Try without a crossover, also, because most (or all) modern NICs are MDI-X capable, eliminating the need for a crossover cable. –  Tom O'Connor Jul 11 '13 at 11:15
    
@Tom O'Connor, same results with straight cable, d>l 1ms, l>d 1-1000ms –  sv13 Jul 11 '13 at 11:23
    
Nice. Hopefully someone here will be able to help you. Out of my hands now ;) –  Tom O'Connor Jul 11 '13 at 11:24

1 Answer 1

up vote 0 down vote accepted

i have disabled everything(QoS, MS file sharing etc.) except ipv4 in connection properties on both machines, and reinstalled ethernet drivers for my laptop, rebooted laptop and then first ping was like:

<1ms
<1ms
400ms
<1ms

then it starts responding with stable <1ms, and file transfer speeds went up 2-3 times, not sure if its permanent fix, or just somethings caprice, but for now ping is good, both ways

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