Do you have the following in the configuration.
ip nhrp nhs 172.16.100.7 It says in the debug output below that you don't have a NHS configured. Regards, Tyson Scott - CCIE #13513 R&S, Security, and SP Technical Instructor - IPexpert, Inc. Mailto: <mailto:[email protected]> [email protected] Telephone: +1.810.326.1444, ext. 208 Live Assistance, Please visit: <http://www.ipexpert.com/chat> www.ipexpert.com/chat eFax: +1.810.454.0130 From: [email protected] [mailto:[email protected]] On Behalf Of Simon Baumann Sent: Saturday, January 23, 2010 6:07 PM To: [email protected] Subject: [OSL | CCIE_Security] Lab 4, section 2, task 4.12 Hi, I'm working on the DMVPN section. After my EIGRP neighbors didn't get up, I reseted my pod any only configured the GRE interfaces, without any ipsec profile or routing. For my knowledge I should be able to ping R7 tunnel interface 172.16.100.7 from R5, which has 172.16.100.5 on Tun100. I ran an "debug nhrp" on R7, here's the output: *Jan 23 23:06:26.503: NHRP: if_up: Tunnel100 proto 0 *Jan 23 23:06:26.703: NHRP: if_up: Tunnel100 proto 0 *Jan 23 23:06:26.703: NHRP: Unable to send Registration - no NHSes configured Here's the debug output of R5: *Jan 24 00:18:15.319: NHRP: if_up: Tunnel100 proto 0 *Jan 24 00:18:15.323: NHRP: Attempting to send packet via DEST 172.16.100.7 *Jan 24 00:18:15.323: NHRP: Send Registration Request via Tunnel100 vrf 0, packet size: 92 *Jan 24 00:18:15.323: NHRP: 120 bytes out Tunnel100 *Jan 24 00:18:15.323: NHRP: Resetting retransmit due to hold-timer for 172.16.100.7 *Jan 24 00:18:16.311: NHRP: Setting retrans delay to 2 for nhs dst 172.16.100.7 *Jan 24 00:18:16.311: NHRP: Attempting to send packet via DEST 172.16.100.7 *Jan 24 00:18:16.311: NHRP: Send Registration Request via Tunnel100 vrf 0, packet size: 92 *Jan 24 00:18:16.311: NHRP: 120 bytes out Tunnel100 My research only lead to this information: http://www.realexam.net/vpns-can-really-upset-me/1368.html Do you have an hint what to check next? Cheers Simon
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