AnyConnects reconnecting problem.

[Rolando Valenzuela]

Hello Community, I need more minds on this, is driving me crazy! and I cannot figure it our why.

95% of the users using AnyConnect have this same problem... you open anyconnect you can connect without problems but always after 60sec or so the VPN has a little impasse and it reconnects, after that no zero problems, the computer never loss network connectivity, this behavior happens even wired.

What can I tweak to avoid this behavior?

Thanks!!

Rolando A. Valenzuela

[4/29/2016 10:17:43 AM] Contacting ACME.
[4/29/2016 10:17:44 AM] Posture Assessment: Required for access
[4/29/2016 10:17:45 AM] Posture Assessment: Checking for updates...
[4/29/2016 10:17:45 AM] Posture Assessment: Initiating...
[4/29/2016 10:17:48 AM] Posture Assessment: Active
[4/29/2016 10:17:48 AM] Posture Assessment: Initiating...
[4/29/2016 10:17:48 AM] Please enter your username and password.
[4/29/2016 10:18:00 AM] User credentials entered.
[4/29/2016 10:18:04 AM] Establishing VPN session...
[4/29/2016 10:18:04 AM] Checking for profile updates...
[4/29/2016 10:18:04 AM] Checking for product updates...
[4/29/2016 10:18:04 AM] Checking for customization updates...
[4/29/2016 10:18:04 AM] Performing any required updates...
[4/29/2016 10:18:04 AM] Establishing VPN session...
[4/29/2016 10:18:04 AM] Establishing VPN - Initiating connection...
[4/29/2016 10:18:04 AM] Establishing VPN - Examining system...
[4/29/2016 10:18:04 AM] Establishing VPN - Activating VPN adapter...
[4/29/2016 10:18:07 AM] Establishing VPN - Configuring system...
[4/29/2016 10:18:07 AM] Establishing VPN...
[4/29/2016 10:18:07 AM] Connected to ACME.
[4/29/2016 10:19:10 AM] Reconnecting to ACME...
[4/29/2016 10:19:10 AM] Establishing VPN - Examining system...
[4/29/2016 10:19:16 AM] Establishing VPN - Activating VPN adapter...
[4/29/2016 10:19:16 AM] Establishing VPN - Configuring system...
[4/29/2016 10:19:17 AM] Establishing VPN...
[4/29/2016 10:19:17 AM] Connected to ACME

[Philip D'Ath]

Do you have a log from the ASA?

Does your ASA have a PPPoE connection, or a connection with an MTU less than 1500 to the outside world?  I have seen this behaviour were the client needs to reconnect with a smaller MTU.

[Rolando Valenzuela]

Yeap, you were right, following Miguel's article (http://www.cisco.com/c/en/us/support/docs/security/anyconnect-secure-mobility-client/116881-technote-anyconnect-00.html) I fixed the problem on my test machine, I will monitor the behavior for a couple of day and update again.

Thank you guys!

Rolando Valenzuela.

[mibricen]

Hello Rolando,

I am glad to hear that the proposed documentation helped towards your inquiry.

Keep us posted with any outcome.

Miguel

[Rolando Valenzuela]

All good guys!! :) thanks for the help!! :)

Rolando Valenzuela.

[mibricen · Accepted solution]

Hello Rolando,

Take a look at this:

http://www.cisco.com/c/en/us/support/docs/security/anyconnect-secure-mobility-client/116881-technote-anyconnect-00.html

You might be running into the described behavior and the document provides possible solutions.

Miguel

[Rolando Valenzuela]

Hello Miguel!

I spent so much time looking for the errors that your article talks about, but I couldn't find any and at the end I said: "well, why not?" and I changed the MTU value and that made the trick!!

Thanks!

group-policy ac_users_group attributes
 webvpn
  anyconnect mtu 1300 

[saifuddin.miyaji]

Thanks...it resolved my issue.

[DouglasFlores6409]

Esto resolvió mis problemas, gracias