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asked 2020-10-21 11:00:34 +0000

balcee gravatar image

How to determine reasons for slow Internet/network performance

Hi team

I hope you can help me with a problem that's beginning to cause me more and more pain over recent days.

We have an office with a subnet of 10.36.0.0 /16.

What's been happening recently is when a laptop joins the network (either LAN connected or WiFi), the devices gets the correct IP assigned through DHCP, but has no network/Internet connection. I'm unable to ping the host from the Data Centre, nor can I see it in the local ARP table. Although it shows up on the DHCP server.

This sounds DNS related but I can't quite put my finger on it.

Would someone be kind enough to look through the Wireshark capture at the following link and tell me if something stands out there please? The IP address of the machine in this case was 10.36.129.3.

Wireshark capture: https://www.dropbox.com/s/l3wv9yxynceget3/LAN%20not%20connected.pcapng?dl=0

Many thanks for your assistance.

How to determine reasons for slow Internet/network performance

Hi team

I hope you can help me with a problem that's beginning to cause me more and more pain over recent days.

We have an office with a subnet of 10.36.0.0 /16.

What's been happening recently is when a laptop joins the network (either LAN connected or WiFi), the devices gets the correct IP assigned through DHCP, but has no network/Internet connection. I'm unable to ping the host from the Data Centre, nor can I see it in the local ARP table. Although it shows up on the DHCP server.

This sounds DNS related but I can't quite put my finger on it.

Would someone be kind enough to look through the Wireshark capture at the following link and tell me if something stands out there please? The IP address of the machine in this case was 10.36.129.3.

Wireshark capture: https://www.dropbox.com/s/l3wv9yxynceget3/LAN%20not%20connected.pcapng?dl=0

Many thanks for your assistance.

How to determine reasons for slow Internet/network performance

Hi team

I hope you can help me with a problem that's beginning to cause me more and more pain over recent days.

We have an office with a subnet of 10.36.0.0 /16.

What's been happening recently is when a laptop joins the network (either LAN connected or WiFi), the devices gets the correct IP assigned through DHCP, but has no network/Internet connection. I'm unable to ping the host from the Data Centre, nor can I see it in the local ARP table. Although it shows up on the DHCP server.

This sounds DNS related but I can't quite put my finger on it.

Would someone be kind enough to look through the Wireshark capture at the following link and tell me if something stands out there please? The IP address of the machine in this case was 10.36.129.3.

Wireshark capture: https://www.dropbox.com/s/l3wv9yxynceget3/LAN%20not%20connected.pcapng?dl=0

Many thanks for your assistance.

How to determine reasons for slow Internet/network performanceMachines get IP address but no connectivity - DNS issue?

Hi team

I hope you can help me with a problem that's beginning to cause me more and more pain over recent days.

We have an office with a subnet of 10.36.0.0 /16.

What's been happening recently is when a laptop joins the network (either LAN connected or WiFi), the devices gets the correct IP assigned through DHCP, but has no network/Internet connection. I'm unable to ping the host from the Data Centre, nor can I see it in the local ARP table. Although it shows up on the DHCP server.

This sounds DNS related but I can't quite put my finger on it.

Would someone be kind enough to look through the Wireshark capture at the following link and tell me if something stands out there please? The IP address of the machine in this case was 10.36.129.3.

Wireshark capture: https://www.dropbox.com/s/l3wv9yxynceget3/LAN%20not%20connected.pcapng?dl=0

Many thanks for your assistance.