munkeegutz
join:2007-10-04
Orlando, FL
| Mysterious latency, hmmmm....
Now I don't understand much about networks, but something is definitely amiss here. Google pings range throughout the day (with no real pattern) between about 70ms w/ 0 packet loss to about 800ms w/ 50% packet loss.
I live in an apartment in Orlando, FL (I go to UCF). This connection is shared between about 2000 people. I did a little research, and I think our ISP is Global Crossing.
Here are my most recent pings, tracerts and pathpings:
It appears that the problem is not caused at all by the internal network. It all appears in the second and third hops. Any ideas on how I should approach or minimize this problem? As it is, download speeds are miserable and the latency/packet loss makes games almost unplayable. |
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Deep Dish
join:2006-08-17
Canada
 ·Rogers Portable In..
edit:
October 4th, @12:24PM
| If your internet connection is as idle as it possibly can (meaning you are not downloading/uploading anything), and you are achieving these results, then your ISP is to blame. Call them up and explain that you are getting packet loss when hitting the 2nd or 3rd hop.
Global Crossing is more likely to be your ISP's backbone to the Internet (in easier terms, your ISP's Internet connection, which they resell to you).
EDIT:
I am a little confused by this statement:
" I live in an apartment in Orlando, FL (I go to UCF). This connection is shared between about 2000 people. "
You live in an apartment and the internet connection you use in your apartment is shared by 2000 people? Are you trying to say that you are using cable, rather then DSL?
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munkeegutz
join:2007-10-04
Orlando, FL
| sorry for the poor explanation. I am not paying for this internet: it comes with the apartment complex. In retrospect, asking a support forum was probably not the best way to handle this situation: I should probably bring this up directly with maintenance or Global Crossing.
These tests were performed on my computer while my connection was idle. I usually pull about 50KBps down and about 15-20KBps up. |
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Deep Dish
join:2006-08-17
Canada | If thats the case, then I'm not surprised by the poor speeds. It could be that someone has Bit Torrent on and just taking up majority of the bandwidth.
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munkeegutz
join:2007-10-04
Orlando, FL | well if that was the case, wouldn't I just be getting poor pings for the first hop? |
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CMoore2004
i r teh smarts
Premium
join:2003-02-06
Jonesville, MI
·Sprint Mobile Broa..
 ·HughesNet Satellit..
| No, the internal network can handle much more than your apartment's backbone to the Internet. It's likely they have a fractional T3 or something to that effect and just don't have the bandwidth to support all of the users.
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Deep Dish
join:2006-08-17
Canada
·Rogers Portable In..
| said by CMoore2004  :No, the internal network can handle much more than your apartment's backbone to the Internet. It's likely they have a fractional T3 or something to that effect and just don't have the bandwidth to support all of the users. Exactly, that first hop is too fast to be on the Internet. That server is located in your apartment complex. Judging that your IP starts with 207, you don't have a private network so all computers can be connected to directly from anywhere on the Internet, rather than having a private network and everyone must connect to that "edge" computer/router. Thats not the case in your network in the complex.
Your second hop latency/delay is too high. Your ISP is at fault in this case.
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CMoore2004
i r teh smarts
Premium
join:2003-02-06
Jonesville, MI
·Sprint Mobile Broa..
·HughesNet Satellit..
| That's wrong. Along with these business-class connections (T1, T3, DS3, etc.), you usually get a certain block of public IP addresses (or use the ones you already have). There is still an edge router, and don't think that the lack of NAT means there isn't. This doesn't mean that it couldn't be his ISP, but it's much more likely his apartment complex not leasing enough bandwidth. If you look at hop 3, it looks like it's all being routed through a single T3, which is where the latency gets really high. We have no way of knowing if that T3 is dedicated to just the apartments, or if it is one of Global Crossing's backbones for the area. Considering their edge router is the next hop, I'd be willing to say that there are 2000 apartments sharing 45mbps.
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Deep Dish
join:2006-08-17
Canada
·Rogers Portable In..
| said by CMoore2004 : This doesn't mean that it couldn't be his ISP, but it's much more likely his apartment complex not leasing enough bandwidth. Or that it's simply congested. I highly doubt a network designer is going to place a small pipe to a building that has a potential of having at least 2000 computers sharing that pipe. I'd be amazed if someone is actually that stupid to do so.
We have no way of knowing if that T3 is dedicated to just the apartments, or if it is one of Global Crossing's backbones for the area. Considering their edge router is the next hop, I'd be willing to say that there are 2000 apartments sharing 45mbps.
I have made no mention that it's is even a T3 line to the building, nor do I know how we came to the conclusion that T3/45mbps is the actual size of the pipe. Regardless, Global Crossing is infact the owners of the IP block to which munkeegutz is using ( 207.138.0.0/16 ). Even the 3rd and 4th hop have a reverse lookup to " gblx.net ", which if you Google it, it ends up going to Global Crossing's website (initially, I didn't think Global Crossing was the ISP, I was wrong). The 2nd hop latency is way too high (the 100ms link), especially for a business class Internet service. It just gets worse beyond that (300ms+).
The next hop when leaving the apartment complex of 100ms is simply way to high. Going back to my original idea, I think the pipe is fine .. it's just too congested
Here is the link for the Global Crossing IP Block (first 2 hops):
»www.dnstools.com/?lookup=on&wwwh···Get+Info
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CMoore2004
i r teh smarts
Premium
join:2003-02-06
Jonesville, MI
·Sprint Mobile Broa..
·HughesNet Satellit..
| So the connection is just fine, but it's congested. Congestion would rank up there among the top 3 things that make a network "not fine".
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