Dear _________ (Name of the Manager),
I am writing to inform you of a network issue that I have encountered. It is affecting my ability to carry out my tasks efficiently.
I shall be obliged if you could address this matter promptly to ensure minimal disruption to our work.
Thank you for your attention to this issue.
Sincerely,
_________ (Your Name)
_________ (Your Position/Department)
_________ (Your Contact Information)
_________ (Your Address)