noclav
asked on
ISP Modem locking up causing Internet issues
I have a site that has 100Mb Down and 20Mb UP. The site consists of 25 APs, 2 managed switches, 17 IP phones, 14 Chromecasts, Sonicwall, and Unifi Cloud Key Controller.
There are about 100 devices connected to the wireless. Mainly Chromebooks.
The issue is that when everyone is on the network the Internet traffic starts to lag and drop packet. I ran a ping to the ISP modem private address and the times were in the 1000s and packets were dropping, I couldnt even connect to web interface of the cable modem. While this is happening if i disconnect the sonicwall then the isp modem returns to normal. I checked the sonicwall cpu usage and its around 13%. I also saw that the bandwidth consumed was around 60Mbps. I also checked the logs of the ISP modem and saw T3 timeouts. I called the ISP and they say its something on our end.
Could it be the ISP modem cant handle all the connections?
Any suggestions.
There are about 100 devices connected to the wireless. Mainly Chromebooks.
The issue is that when everyone is on the network the Internet traffic starts to lag and drop packet. I ran a ping to the ISP modem private address and the times were in the 1000s and packets were dropping, I couldnt even connect to web interface of the cable modem. While this is happening if i disconnect the sonicwall then the isp modem returns to normal. I checked the sonicwall cpu usage and its around 13%. I also saw that the bandwidth consumed was around 60Mbps. I also checked the logs of the ISP modem and saw T3 timeouts. I called the ISP and they say its something on our end.
Could it be the ISP modem cant handle all the connections?
Any suggestions.
ASKER
I forgot to mention my admin laptop which is wired. These results were from a wired device.
Which sonicwall appliance do you have? It may be overloaded
ASKER
It's a TZ500
I have a TZ500 too and about 150 devices connected to Internet. I vote for a undersized cable modem. Could you post make/model?
ASKER
Model is Comcast / Cisco DPC3939B
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Are your network switches in good condition? Try to ping from both switches separately to make sure you are getting the same latency before judging the Firewall is the culprit.
Contact a local vendor to provide a better firewall as a POC (proof of concept), and if it works perfectly, keep it.
Contact a local vendor to provide a better firewall as a POC (proof of concept), and if it works perfectly, keep it.
ASKER
i get the same results pinging from switches to modem or from wired laptop.
i dropped the MTU to 1400 it seems to not drop packets at the moment.
Reply from 10.1.10.1: bytes=32 time=1ms TTL=64
Reply from 10.1.10.1: bytes=32 time=2ms TTL=64
Reply from 10.1.10.1: bytes=32 time=8ms TTL=64
Reply from 10.1.10.1: bytes=32 time=4ms TTL=64
Reply from 10.1.10.1: bytes=32 time=2ms TTL=64
Reply from 10.1.10.1: bytes=32 time=29ms TTL=64
Reply from 10.1.10.1: bytes=32 time=17ms TTL=64
Reply from 10.1.10.1: bytes=32 time=1ms TTL=64
Reply from 10.1.10.1: bytes=32 time=1ms TTL=64
Reply from 10.1.10.1: bytes=32 time=24ms TTL=64
Reply from 10.1.10.1: bytes=32 time=3ms TTL=64
Reply from 10.1.10.1: bytes=32 time=2ms TTL=64
Reply from 10.1.10.1: bytes=32 time=3ms TTL=64
Reply from 10.1.10.1: bytes=32 time=2ms TTL=64
Reply from 10.1.10.1: bytes=32 time=413ms TTL=64
Reply from 10.1.10.1: bytes=32 time=417ms TTL=64
Reply from 10.1.10.1: bytes=32 time=407ms TTL=64
Reply from 10.1.10.1: bytes=32 time=294ms TTL=64
Reply from 10.1.10.1: bytes=32 time=296ms TTL=64
Reply from 10.1.10.1: bytes=32 time=287ms TTL=64
Reply from 10.1.10.1: bytes=32 time=99ms TTL=64
i dropped the MTU to 1400 it seems to not drop packets at the moment.
Reply from 10.1.10.1: bytes=32 time=1ms TTL=64
Reply from 10.1.10.1: bytes=32 time=2ms TTL=64
Reply from 10.1.10.1: bytes=32 time=8ms TTL=64
Reply from 10.1.10.1: bytes=32 time=4ms TTL=64
Reply from 10.1.10.1: bytes=32 time=2ms TTL=64
Reply from 10.1.10.1: bytes=32 time=29ms TTL=64
Reply from 10.1.10.1: bytes=32 time=17ms TTL=64
Reply from 10.1.10.1: bytes=32 time=1ms TTL=64
Reply from 10.1.10.1: bytes=32 time=1ms TTL=64
Reply from 10.1.10.1: bytes=32 time=24ms TTL=64
Reply from 10.1.10.1: bytes=32 time=3ms TTL=64
Reply from 10.1.10.1: bytes=32 time=2ms TTL=64
Reply from 10.1.10.1: bytes=32 time=3ms TTL=64
Reply from 10.1.10.1: bytes=32 time=2ms TTL=64
Reply from 10.1.10.1: bytes=32 time=413ms TTL=64
Reply from 10.1.10.1: bytes=32 time=417ms TTL=64
Reply from 10.1.10.1: bytes=32 time=407ms TTL=64
Reply from 10.1.10.1: bytes=32 time=294ms TTL=64
Reply from 10.1.10.1: bytes=32 time=296ms TTL=64
Reply from 10.1.10.1: bytes=32 time=287ms TTL=64
Reply from 10.1.10.1: bytes=32 time=99ms TTL=64
Try to ping from a wired connection (from PC) to the ISP modem and see the same latency and drops?. We want to make sure the issue is not from the wireless.