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sbiddle

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#11136 4-Jan-2007 19:29
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I'm just having a play with a Vodem here and have noticed some rather significant differnces in ping times depending on the APN used

direct.vodafone.net.nz 161ms average over 100 pings
internet 271ms average over 100 pinds
www.vodafone.net.nz 266ms average over 100 pings

Can anybody why the direct APN which in a NAT IP with no optimisation is so much quicker than a public IP? I would have assumed internet would have been the fastest (public IP no optimisation server) followed by www.vodafone.net.nz which obviously needs to hop through an optimisation server.


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antoniosk
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  #56907 4-Jan-2007 19:51
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My guess is that each APN is using a different router to get onto the net - this is how we built it at T-Mobile and O2. And hardly anyone is using the "direct" APN, whereas www is preprogrammed on all Voda NZ mobiles. The Internet APN has been around for a few years now, and there's sure to be a good base of users 'sweating' Voda's kit...





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sbiddle

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  #57362 9-Jan-2007 18:12
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I've just spent the last hour or so playing with some various settings and it's interesting to see the differences between Vodafone APN's. Traffic is even being routed differently depending on the APN which explains the ping times.


The ping times of under 100ms are sensational but aren't constant, I received ping times in the low 100's on average testing the Vodem on several occasions. Traffic using www.vodafone.net.nz however is being routed differently as the tracert results show and the latency suffers big time.


Using APN direct.vodafone.net.nz

Tracing route to wlg.italk.co.nz [203.184.16.6]
over a maximum of 30 hops:

  1   114 ms    99 ms    99 ms  172.27.74.33
  2   106 ms   119 ms    99 ms  172.27.65.1
  3   104 ms    99 ms    99 ms  172.27.65.124
  4    98 ms    99 ms    99 ms  172.27.65.188
  5   107 ms    98 ms    99 ms  172.27.86.33
  6   127 ms    99 ms   109 ms  172.27.86.1
  7    97 ms    99 ms    99 ms  203.167.225.157
  8    97 ms    99 ms    99 ms  g9-927.u12.brh.telstraclear.net [218.101.61.4]
  9   115 ms   109 ms   109 ms  g1-926.u11.pnr.telstraclear.net [218.101.61.33]

 10   106 ms   109 ms   109 ms  ggis-gige-v906.telstraclear.net [203.98.18.67]
 11   107 ms   109 ms   109 ms  g0-1-0-4.akcr8.global-gateway.net.nz [210.55.202
.49]
 12   106 ms   129 ms   109 ms  attica-dom.akcr8.global-gateway.net.nz [202.50.1
16.198]
 13   126 ms   109 ms   109 ms  f0-0.5.cpiak1-r1.tranzpeer.net [202.180.64.71]
 14   106 ms    99 ms   119 ms  vip1.italk.co.nz [203.184.16.6]

Trace complete.


Pinging geekzone.co.nz [210.48.73.74] with 32 bytes of data:

Reply from 210.48.73.74: bytes=32 time=103ms TTL=112
Reply from 210.48.73.74: bytes=32 time=101ms TTL=112
Reply from 210.48.73.74: bytes=32 time=89ms TTL=112
Reply from 210.48.73.74: bytes=32 time=88ms TTL=112

Ping statistics for 210.48.73.74:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 88ms, Maximum = 103ms, Average = 95ms


Using APN www.vodafone.net.nz

Pinging geekzone.co.nz [210.48.73.74] with 32 bytes of data:

Reply from 210.48.73.74: bytes=32 time=242ms TTL=102
Reply from 210.48.73.74: bytes=32 time=250ms TTL=102
Reply from 210.48.73.74: bytes=32 time=229ms TTL=102
Reply from 210.48.73.74: bytes=32 time=247ms TTL=102

Ping statistics for 210.48.73.74:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 229ms, Maximum = 250ms, Average = 242ms


Tracing route to wlg.italk.co.nz [203.184.16.6]
over a maximum of 30 hops:

  1   124 ms   169 ms   139 ms  172.26.74.33
  2   128 ms   149 ms   139 ms  172.26.65.1
  3   147 ms   149 ms   119 ms  172.26.65.124
  4   157 ms   149 ms   159 ms  172.26.65.188
  5   148 ms   139 ms   158 ms  172.26.86.33
  6   146 ms   149 ms   149 ms  172.26.86.1
  7   147 ms   148 ms   150 ms  vodafone-customer.gw2.akl1.alter.net [203.110.9.
21]
  8   137 ms   139 ms   119 ms  so-3-0-0.XR2.AKL1.ALTER.NET [210.80.38.149]
  9   136 ms   159 ms   159 ms  so-3-0-0.BR1.AKL1.ALTER.NET [210.80.38.138]
 10   317 ms   298 ms   299 ms  atm3-1-0-2.sn1.optus.net.au [202.139.18.17]
 11   317 ms   310 ms   289 ms  AsiaNetcom.sn1.optus.net.au [202.139.18.2]
 12   316 ms   310 ms   308 ms  so-2-0-3-0.gw4.akl1.asianetcom.net [202.147.55.1
45]
 13   326 ms   288 ms   329 ms  ip-202-147-46-234.asianetcom.net [202.147.46.234
]
 14   296 ms   310 ms   309 ms  vip1.italk.co.nz [203.184.16.6]

Trace complete.


 
 
 
 


johnr
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  #57393 9-Jan-2007 20:09
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" I've noticed the Vodem tends to jump between HSDPA and 3G mode " from BLOG

When moving traffic you are allocated a HSDPA channel when Idle you are in WCDMA

sbiddle

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  #57394 9-Jan-2007 20:15
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johnr: " I've noticed the Vodem tends to jump between HSDPA and 3G mode " from BLOG

When moving traffic you are allocated a HSDPA channel when Idle you are in WCDMA


How long does the HSDPA connection have to be idle for before the network moves you back to WCDMA? The Vodem still seems a bit sleepy when it comes to moving from WCDMA to HSDPA compared to the data cards, is this likely to be improved with any network or firmware upgrades?

Can you actually tell us where the Vodafone proxy server is located johnr? I assume the higher ping times for the APN's going through the proxy are a result of this being located outside NZ?

Surfing the net on the direct APN with good signal strength is very cool especially with the ping time around the low 100ms range and I've also experimented with quite a few different video streams up to 900kbps and have yet to find any that need to rebuffer! The big test will come when a few more people start to use the network!







johnr
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  #57396 9-Jan-2007 20:21
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Sorry not sure where the opt server is!

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