Skip to main content

Internet speed

info

The relevant information is currently still being prepared. We will make the complete contents available as soon as possible.


The speed test measures the entire network speed from your computer to a reference server on the Internet. This checks the data transmission performance of your Swisscom Internet connection. This analysis provides insights into the speed and quality of your Internet connection.

warning

Swisscom does not guarantee a minimum bandwidth. The transmission speeds shown represent best values and cannot be achieved in every case. The effective bandwidth depends in particular on the line length between the telephone connection and the local exchange as well as the quality of the lines. If other services are also used via the same fixed network connection, this can also affect the available bandwidth. Detailed information on this can be found in the Special Terms and Conditions Internet

CNLAB application​

The free programme from the independent company cnlab Information Technology AG (www.cnlab.ch) tests upload and download speeds as well as latency times - the time it takes for a data packet to travel from your device to the server and back. On the user interface you will find your UserID, which you can use to call up additional technical details for each measurement. This includes information about the network interface used, whether WLAN or Ethernet, and any packet losses that could indicate problems in the network.

The "CNLAB" applications can be downloaded from https://www.cnlab.ch/speedtest/. The application is available for Windows, MacOS, Linux, Android and iOS.


Prerequisite​

Cabling & network hardware​

Ethernet cable​

  • 1 Gbit/s → at least Cat5e

  • 2.5-5 Gbit/s → at least Cat6

  • 10 Gbit/s → Cat6a or Cat7 recommended (Cat7a / Cat8 optional)


Network card of the end device​
  • The installed NIC must support the desired speed:
    1 Gbit/s, 2.5 Gbit/s, 5 Gbit/s or 10 Gbit/s.

Switches / Routers / Access Points​

All active components along the path must support the same speed. Mixed environments (e.g. 10G → 1G) automatically throttle to the slowest component.


PC/laptop performance (performance)​

A speed test is heavily dependent on the CPU and RAM.

Important:

  • Modern CPU (at least Intel i5/Ryzen 5 or better)

  • Sufficient RAM (8-16 GB)

  • SSD instead of HDD

  • No background processes that burden the network stack

For 10 Gbit/s tests:

  • CPU with high single-core performance

  • PCIe-based 10G NIC (not USB adapter due to limitation)

  • Jumbo frames optional, but not mandatory


Local network conditions​

  • LAN connection (no WLAN tests)

  • Other devices in the LAN should not transfer large amounts of data at the same time ➜ Remove if possible

  • Switch port correctly set to auto-negotiation or fixed speed

  • No VLAN configurations that limit or filter traffic

info

Are you missing something here? Give us feedback! pilot@swisscom.com Please describe in which area you would expect something or what we could do better.

Last updated on