How to solve the Reconnection issue with Cisco Anyconnect

The root cause of  reconnecting Cisco Anyconnect is the incorrect MTU value.

Step 1 :- Use the following command to check the MTU value:

 netsh interface ipv4 show subinterfaces

The value of Cisco Anyconnect adapter, That may be a huge one containing at least 10 digits.

Step 2 :-  Set the MTU value by the following command (Use Command prompt as Administrator) :

netsh interface ipv4 set subinterface "loopback pseudo-interface 1" mtu=1273 store=persistent

"loopback pseudo-interface 1" is the network adapter name for Cisco Anyconnect.

1273 is the appropriate MTU value , The value might vary from machine to machine, which works fine with Cisco Anyconnect in my system.

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Note:- Open Command Prompt with Administrator Privilege and run the commands. 

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