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TDT-TT · 04-14-2009, 08:43 AM

I am having this issue and still have not find the solution or what cause the problem. The problem is the Spoke configured to have 3 tunnels to 3 different hubs using DMVPN technology and this has been working fine just over a year. Recently, I found out that there is a problem on Tunnel0 and Tunnel2. Ping is dropping on those tunnel and causing packet drop. GRE tunnel0 especially keeps bouncing up and down. Every time this happens EIGRP may flapping and I have to shut down Tunnel0 and Tunnel2 so all traffic to Tunnel1 and this has been working good so far. For example:
%DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor (Tunnel2) is down: Peer goodbye received
%DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor (Tunnel2) is up: new adjacency
and this keep going on every few seconds for tunnel0 and tunnel2.
Does anyone have same problem and how to fix this?

04-14-2009, 08:43 AM	#1 (permalink)
TDT-TT Registered User Join Date: Apr 2009 Posts: 1 OS: XP	GRE Tunnel keeps bouncing up and down I am having this issue and still have not find the solution or what cause the problem. The problem is the Spoke configured to have 3 tunnels to 3 different hubs using DMVPN technology and this has been working fine just over a year. Recently, I found out that there is a problem on Tunnel0 and Tunnel2. Ping is dropping on those tunnel and causing packet drop. GRE tunnel0 especially keeps bouncing up and down. Every time this happens EIGRP may flapping and I have to shut down Tunnel0 and Tunnel2 so all traffic to Tunnel1 and this has been working good so far. For example: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor (Tunnel2) is down: Peer goodbye received %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor (Tunnel2) is up: new adjacency and this keep going on every few seconds for tunnel0 and tunnel2. Does anyone have same problem and how to fix this?