[c-nsp] Mysterious GRE tunnel flap

[Ziv Leyes]

Beats me...
I'd love to hear if and when you find the source of the problem


From: Quinn Kuzmich [mailto:lostinmoscow at gmail.com]
Sent: Monday, July 26, 2010 3:27 AM
To: Ziv Leyes
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Mysterious GRE tunnel flap

There's nothing under the HSDP events.  The other router has a higher priority over 100 set on it's interface.
On Sun, Jul 25, 2010 at 12:26 AM, Ziv Leyes <zivl at gilat.net<mailto:zivl at gilat.net>> wrote:
I'll take a wild guess here.
Since you're sourcing the tunnel with the hsrp ip, and you don't have a standby priority set it means that there is another device "competing" on the  IP address. Could it be that for some strange reason the hsrp is fluctuating between them and this causes the tunnel to be unstable?
Can you check the HSRP events and see what happens?
Also, as I said, try to take off the keepalive on the tunnel and set a higher standby priority to one of the devices, just to see if it helps.
HTH
Ziv




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