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Packet loss through EZVPN

sterdnotshaken
Level 1
Level 1

‎09-13-2013 08:57 AM

Howdy all!

Here is the scenario:

  • User has a Cisco 881 router at home connecting to the Internet on the outside and a company provide PC\IP phone on the inside.

  • This home router has a EZVPN tunnel from it to the Corporate Hub site which has a 3925 that is acting as the head-end router.

Problem:

  • Users are complaining about voice quality issues.

Testing:

  • One thing I have found odd is that, from my PC, if I ping traffic that has to go THROUGH the tunnel to the SVI on the remote 881 router (10.x.x.x range), I loose packets fairly often... BUT, if I have another parallel ping going to the public IP of that remote router, I loose Zero pings...
    • So it appears that this issue isn't related to the circuits
  • Could EZVPN be renegotiating tunnel settings every so often and that is causing the dropped pings through said tunnel and ultimately the VoIP quality issues?

Thanks in advance!!

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sterdnotshaken
Level 1
Level 1

‎09-13-2013 02:36 PM

Howdy there!

Thought you might like to know that the problem appears to have been related to the fact we apparently didn't have CEF enabled on the head-end router... Once we enabled that the ICMP drop's and voice quality issues went away!

Thanks!

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