[Q] Pinging Motorola Xoom 3G

[wisekki]

Hello,

Why is this happening:

I'm using xoom 3g with hsdpa -connection. If I ping my xoom's ip from outside (or another address from the console) to maintain hsdpa -connection, the browser does not work as it should.

Sites do not load completely; the browser 'loading bar' stops in the middle and nothing happens. About only 1 image is loaded from the sites then nothing. But the ping keeps getting responses. I'm a bit confused why this is happening

- Andy

 

[burden010]

Ever heard of a DOS attack? It's where multiple clients ping a host on the internet so that there's so much traffic going to the host that it can't operate properly. Now, most hosts on the internet have a decent connection meaning it takes a lot to bring them down. You're on a 3G connection... which are flakey at the best of times, nevermind if someone's constantly jamming icmp packets down it.

Of course, I could be wrong, but your symptoms definitely sound like that's what's happening.

Why do you have a constant ping going anyway?

 

[wisekki]

Thnx for your quick response!

The host that I'm pinging from the xoom is google.fi and when I'm pinging xoom, it's from my own server that is not under dos attack. I know that 3G connection can be a poor one but that's not the case imo. At least my ping response times are 20-40ms.

I did a fast testing with the new firefox5 and this effect does not happen with it. I have to do some more fiddling with firefox.

The reason why I'm pinging constantly is to maintain HSDPA -connection and prevent xoom from roaming when I'm actually using the device like browsing the web and using gtalk. The roaming happens way too quickly (xoom drops to 3g from hsdpa)

- Andy

 

[ydaraishy]

The reason why I'm pinging constantly is to maintain HSDPA -connection and prevent xoom from roaming when I'm actually using the device like browsing the web and using gtalk. The roaming happens way too quickly (xoom drops to 3g from hsdpa)

- Andy

Does that actually work? I see no reason why it should.

ed. I can't even reproduce what you're seeing. It may be that we're on different carriers, but my device isn't responding to pings from the world while on mobile data.

It's normal for HS*PA to fall back on 3G sometimes when it can't actually maintain a HS*PA connection.

 

[burden010]

Does that actually work? I see no reason why it should.

ed. I can't even reproduce what you're seeing. It may be that we're on different carriers, but my device isn't responding to pings from the world while on mobile data.

It's normal for HS*PA to fall back on 3G sometimes when it can't actually maintain a HS*PA connection.

Yeah I thought the whole point of it falling back to 3G was because the wasn't capable of holding an HSPDA connection? Certainly if I'm travelling I get a mixture of 3G and H... and sometimes still GPRS (*shakes fist at Orange*).

 

[wisekki]

Does that actually work? I see no reason why it should.

ed. I can't even reproduce what you're seeing. It may be that we're on different carriers, but my device isn't responding to pings from the world while on mobile data.

It's normal for HS*PA to fall back on 3G sometimes when it can't actually maintain a HS*PA connection.

Yes it works with my provider anyway.. On the status bar when roaming/doing nothing xoom says that my connection is '3G.' When I start to ping it (or from it) the connection changes to HSDPA; logo changes to 'H' and it prevents it from falling back to 3G. Everything works much faster when the roaming doesn't happen and for some reason even the conn dies sometimes (no internet connection) when it keeps changing it back and worth.

Didn't have too much time to test it with firefox5, but it seems that this doesn't happen with it.. but firefox itselfs crashes a bit too often Maybe this whole "thing" is fixed in honeycomb 3.1.

- Andy