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300-730 · Question #211

An engineer configured a Secure Client IKEv2 connection. The connection often fails without a specific sequence. During debugging a Diffie-Hellman group mismatch or a similar false negative is…

The correct answer is B. Ensure that UserGroup matches the name of the tunnelgroup to which the IKEv2 connection fails. In Cisco Secure Client IKEv2 configurations, the UserGroup attribute in the client XML profile must exactly match the tunnel-group name on the ASA, and a mismatch causes intermittent failures that can appear as misleading errors such as a Diffie-Hellman group mismatch.

Troubleshooting VPNs

Question

An engineer configured a Secure Client IKEv2 connection. The connection often fails without a specific sequence. During debugging a Diffie-Hellman group mismatch or a similar false negative is indicated. Which action resolves the issue?

Options

  • AEnsure that Ipsec-proposal name matches the name of the tunnelgroup to which the IKEv2 connection fails.
  • BEnsure that UserGroup matches the name of the tunnelgroup to which the IKEv2 connection fails.
  • CEnsure that HostName matches the name of the tunnelgroup to which the IKEv2 connection fails.
  • DEnsure that GroupPolicy_AC attributes match the name of the tunnelgroup to which the IKEv2 connection fails.

How the community answered

(47 responses)
  • A
    4% (2)
  • B
    68% (32)
  • C
    17% (8)
  • D
    11% (5)

Why each option

In Cisco Secure Client IKEv2 configurations, the UserGroup attribute in the client XML profile must exactly match the tunnel-group name on the ASA, and a mismatch causes intermittent failures that can appear as misleading errors such as a Diffie-Hellman group mismatch.

AEnsure that Ipsec-proposal name matches the name of the tunnelgroup to which the IKEv2 connection fails.

The IPsec-proposal name is referenced within IKEv2 proposal or crypto map configurations and is not required to match the tunnel-group name.

BEnsure that UserGroup matches the name of the tunnelgroup to which the IKEv2 connection fails.Correct

The UserGroup value in the Cisco Secure Client XML profile identifies which ASA tunnel-group the client must connect to, and this value must match the tunnel-group name exactly. When UserGroup is mismatched, the ASA cannot correctly map the IKEv2 session to the intended tunnel-group and its associated IKEv2 policies, resulting in negotiation failures that surface as false-negative errors like DH group mismatches.

CEnsure that HostName matches the name of the tunnelgroup to which the IKEv2 connection fails.

HostName in the client profile identifies the ASA's FQDN or IP address used to reach the VPN endpoint and does not affect tunnel-group selection or IKEv2 policy matching.

DEnsure that GroupPolicy_AC attributes match the name of the tunnelgroup to which the IKEv2 connection fails.

GroupPolicy_AC attributes define per-user session settings applied after a successful tunnel-group match and do not influence IKEv2 tunnel-group identification during negotiation.

Concept tested: Secure Client IKEv2 UserGroup to tunnel-group name matching

Source: https://www.cisco.com/c/en/us/td/docs/security/asa/asa99/configuration/vpn/asa-99-vpn-config/vpn-anyconnect.html

Topics

#Secure Client#IKEv2#UserGroup#tunnel-group

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