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An engineer is troubleshooting a new DMVPN setup on a Cisco IOS router. After the show crypto isakmp sa command is issued, a response is returned of "MM_NO_STATE." Why does this failure occur?

A.

The ISAKMP policy priority values are invalid.

Answers
A.

The ISAKMP policy priority values are invalid.

B.

ESP traffic is being dropped.

Answers
B.

ESP traffic is being dropped.

C.

The Phase 1 policy does not match on both devices.

Answers
C.

The Phase 1 policy does not match on both devices.

D.

Tunnel protection is not applied to the DMVPN tunnel.

Answers
D.

Tunnel protection is not applied to the DMVPN tunnel.

Suggested answer: C

Explanation:

https://www.cisco.com/c/en/us/support/docs/security/dynamic-multipoint-vpn-dmvpn/111976-dmvpn-troubleshoot-00.htmlThe MMNOSTATE failure occurs when the ISAKMP policy priority values are not configured correctlyon both devices.

The ISAKMP policy priority values are used to determine the order in which theISAKMP policies are applied. If the priority values do not match between the two devices, theISAKMP tunnel may not be established correctly, resulting in the MMNOSTATE failure. To resolve thisissue, the engineer should ensure that the ISAKMP policy priority values are configured correctly onboth the router and the peer.

asked 10/10/2024
Flamur Kapaj
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