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Weird network issue
Hello everyone,
I've been trying to troubleshoot this with my boss, but I'm stumped. Here's the issue:
We have laptops, Chrome books, and iPads. The laptops can connect to the internet and browse like normal. The Chromebooks and iPads can only connect to certain websites, while the majority of them "sit and spin" while loading.
We've checked our ISP, our firewall, and rebooted the switches and APs, but that didn't help. The laptops (both mac and PC) are running as normal.
Any ideas?
Thanks.
I've been trying to troubleshoot this with my boss, but I'm stumped. Here's the issue:
We have laptops, Chrome books, and iPads. The laptops can connect to the internet and browse like normal. The Chromebooks and iPads can only connect to certain websites, while the majority of them "sit and spin" while loading.
We've checked our ISP, our firewall, and rebooted the switches and APs, but that didn't help. The laptops (both mac and PC) are running as normal.
Any ideas?
Thanks.
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darkerz
Member Posts: 431 ■■■■□□□□□□
How's your DNS and IP Configuration look like side by side?:twisted: -
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zidian
Member Posts: 132
The Chromebooks and iPads can only connect to certain websites, while the majority of them "sit and spin" while loading.
Definitely sounds like a DNS issue. Check the DNS servers configured on each. I'd venture that the ones that aren't working are using a different DNS server. If it is set to configure automatically, try setting it manually.WGU BS-IT Software | Completed 9/30/2014 -
Optionswargamer6
Member Posts: 56 ■■□□□□□□□□
We tried using Google's DNS and had no luck. Same with other 3rd party ones.
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Optionsdarkerz
Member Posts: 431 ■■■■□□□□□□
Has this worked before?
Has anyone changed anything
? :twisted: -
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networker050184
Mod Posts: 11,962 Mod
Sounds like a possible MTU/MSS issue.An expert is a man who has made all the mistakes which can be made. -
Optionswargamer6
Member Posts: 56 ■■□□□□□□□□
Has this worked before?
Has anyone changed anything?
Was working fine until today. -
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no!all!
Member Posts: 245 ■■■□□□□□□□
Have you tried turning it off and back on again?
...I just had to!A+, N+, S+, CCNA:RS, CCNA:Sec
"In high society TCP is more welcome than UDP. At least it knows a proper handshake" - Ben Franklin
2019 Goals: CCNP:RS & relocate to St. Pete, FL! -
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keenon
Member Posts: 1,922 ■■■■□□□□□□
agreed , seen this one before as wellnetworker050184 wrote: »Sounds like a possible MTU/MSS issue.Become the stainless steel sharp knife in a drawer full of rusty spoons -
Optionswargamer6
Member Posts: 56 ■■□□□□□□□□
agreed , seen this one before as well
How would one being troubleshooting that? I'm a network newbie. -
OptionsObdurate
Member Posts: 108
How would one being troubleshooting that? I'm a network newbie.
The first question that I always ask is "what changed?" You said that the Chromebooks were working and then they were not, so what changed from the last time they worked until now?
Did you add a web filter?
Did you add a new firewall?
Are you using a proxy server? Or a global proxy server?
Did you add new wireless Access Points? Are those APs doing NAT?
What changed on your DNS server(s)? (I suspect this is where the issue is by the way)
Is there a rogue AP on your network? (This happens way to often)
Testing your Chromebooks:
What is your Chromebook's IP address? Is it the proper range?
From your Chromebook can you ping another device?
Can you ping your gateway?
Can you ping your public IP Address?
Can you ping your DNS server(s)?
Pull up a browser and go 199.181.132.249, did disney's website appear?
Pull up a browser and type disney.com did the website appear?
Run a tracert from your Chromebook to Google's DNS at 8.8.8.8, does the trace stop at a device on your LAN?
Obdurate~
