The vedge compares the received proposal sent by the peer against its configured proposals. Check IKE Proposals The first step in troubleshooting phase-1 (IKEv2 in my case) is to confirm that there are matching proposals on both sides. IKEv2-PLAT-4: RECV PKT [IKE_AUTH] [192.168.1.1]:25171->[10.0.0.1]:4500 InitSPI=0x58aff71141ba436b RespSPI=0xfc696330e6b94d7f MID=00000001, IKEv2-PROTO-3: Rx [L 10.0.0.1:4500/R 192.168.1.1:25171/VRF i0:f0] m_id: 0x1. ****************************************Date : 04/23/2013Time : 16:24:55Type : InformationSource : acvpnuiDescription : Function: ApiCert::getCertListFile: .\ApiCert.cppLine: 259Number of certificates found: 0****************************************Date : 04/23/2013Time : 16:25:00Type : InformationSource : acvpnuiDescription : Initiating VPN connection to the secure gateway https://10.0.0.1/ASA-IKEV2****************************************Date : 04/23/2013Time : 16:25:00Type : InformationSource : acvpnagentDescription : Tunnel initiated by GUI Client. Only a single EAP authentication method is allowed within an EAP conversation. The client sends the AUTH payload only after the EAP exchange is successful. Generated XML message below9.0(2)8ASA-IKEV21367268141499443IKEv2-PROTO-3: (6): Building packet for encryption; contents are:EAP Next payload: NONE, reserved: 0x0, length: 461 Code: request: id: 2, length: 457 Type: Unknown - 254EAP data: 452 bytesIKEv2-PROTO-3: Tx [L 10.0.0.1:4500/R 192.168.1.1:25171/VRF i0:f0] m_id: 0x2IKEv2-PROTO-3: HDR[i:58AFF71141BA436B - r: FC696330E6B94D7F]IKEv2-PROTO-4: IKEV2 HDR ispi: 58AFF71141BA436B - rspi: FC696330E6B94D7FIKEv2-PROTO-4: Next payload: ENCR, version: 2.0IKEv2-PROTO-4: Exchange type: IKE_AUTH, flags: RESPONDER MSG-RESPONSEIKEv2-PROTO-4: Message id: 0x2, length: 524ENCR Next payload: EAP, reserved: 0x0, length: 496Encrypted data: 492 bytesIKEv2-PLAT-4: SENT PKT [IKE_AUTH] [10.0.0.1]:4500->[192.168.1.1]:25171 InitSPI=0x58aff71141ba436b RespSPI=0xfc696330e6b94d7f MID=00000002IKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000002 CurState: R_BLD_EAP_REQ Event: EV_START_TMRIKEv2-PROTO-3: (6): Starting timer to wait for user auth message (120 sec)IKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000002 CurState: R_WAIT_EAP_RESP Event: EV_NO_EVENT. If your network is live, make sure that you understand the potential impact of any command. Since the ASA is willing to use an extensible authentication method, it places an EAP payload in message 4 and defers sending SAr2, TSi, and TSr until the initiator authentication is complete in a subsequent IKE_AUTH exchange. Troubleshoot IGP Flaps, Packet Loss, or Tunnel Bounce across a VPN Tunnel with EEM and IP SLAs 14/Jun/2022 Troubleshoot IPsec Anti-Replay Check Failures 25/Mar/2022 Troubleshooting Microsoft Network Neighborhood After Establishing a VPN Tunnel With the Cisco VPN Client 08/Oct/2018 Troubleshooting Site to Site VPN Implementations. Decrypted packet:Data: 540 bytesIKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000001 CurState: R_WAIT_AUTH Event: EV_RECV_AUTHIKEv2-PROTO-3: (6): Stopping timer to wait for auth messageIKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000001 CurState: R_WAIT_AUTH Event: EV_CHK_NAT_TIKEv2-PROTO-3: (6): Check NAT discoveryIKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000001 CurState: R_WAIT_AUTH Event: EV_CHG_NAT_T_PORTIKEv2-PROTO-2: (6): NAT detected float to init port 25171, resp port 4500IKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000001 CurState: R_WAIT_AUTH Event: EV_PROC_IDIKEv2-PROTO-2: (6): Recieved valid parameteres in process idIKEv2-PLAT-3: (6) peer auth method set to: 0IKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000001 CurState: R_WAIT_AUTH Event: EV_CHK_IF_PEER_CERT_NEEDS_TO_BE_FETCHED_FOR_PROF_SELIKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000001 CurState: R_WAIT_AUTH Event: EV_GET_POLICY_BY_PEERIDIKEv2-PROTO-3: (6): Getting configured policiesIKEv2-PLAT-3: New AnyConnect Client connection detected based on ID payloadIKEv2-PLAT-3: my_auth_method = 1IKEv2-PLAT-3: (6) peer auth method set to: 256IKEv2-PLAT-3: supported_peers_auth_method = 16IKEv2-PLAT-3: (6) tp_name set to: Anu-ikev2IKEv2-PLAT-3: trust point set to: Anu-ikev2IKEv2-PLAT-3: P1 ID = 0IKEv2-PLAT-3: Translating IKE_ID_AUTO to = 9IKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000001 CurState: R_WAIT_AUTH Event: EV_SET_POLICYIKEv2-PROTO-3: (6): Setting configured policiesIKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000001 CurState: R_WAIT_AUTH Event: EV_VERIFY_POLICY_BY_PEERIDIKEv2-PROTO-3: (6): Verify peer's policyIKEv2-PROTO-3: (6): Matching certificate foundIKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000001 CurState: R_WAIT_AUTH Event: EV_CHK_CONFIG_MODEIKEv2-PROTO-3: (6): Received valid config mode dataIKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000001 CurState: R_WAIT_AUTH Event: EV_SET_RECD_CONFIG_MODEIKEv2-PLAT-3: (6) DHCP hostname for DDNS is set to: winxp64templateIKEv2-PROTO-3: (6): Set received config mode dataIKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000001 CurState: R_WAIT_AUTH Event: EV_CHK_AUTH4EAPIKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000001 CurState: R_WAIT_AUTH Event: EV_CHK_EAPIKEv2-PROTO-3: (6): Check for EAP exchangeIKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000001 CurState: R_BLD_AUTH Event: EV_GEN_AUTHIKEv2-PROTO-3: (6): Generate my authentication dataIKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000001 CurState: R_BLD_AUTH Event: EV_CHK4_SIGNIKEv2-PROTO-3: (6): Get my authentication methodIKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000001 CurState: R_BLD_AUTH Event: EV_SIGNIKEv2-PROTO-3: (6): Sign auth dataIKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000001 CurState: R_BLD_AUTH Event: EV_OK_AUTH_GENIKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000001 CurState: R_BLD_EAP_AUTH_REQ Event: EV_AUTHEN_REQIKEv2-PROTO-2: (6): Asking the authenticator to send EAP request, Created element name config-auth valueAdded attribute name client value vpn to element config-authAdded attribute name type value hello to element config-authCreated element name version value 9.0(2)8Added element name version value 9.0(2)8 to element config-authAdded attribute name who value sg to element versionGenerated XML message below9.0(2)8IKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000001 CurState: R_BLD_EAP_AUTH_REQ Event: EV_RECV_EAP_AUTHIKEv2-PROTO-5: (6): Action: Action_NullIKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000001 CurState: R_BLD_EAP_AUTH_REQ Event: EV_CHK_REDIRECTIKEv2-PROTO-3: (6): Redirect check with platform for load-balancingIKEv2-PLAT-3: Redirect check on platformIKEv2-PLAT-3: ikev2_osal_redirect: Session accepted by 10.0.0.1IKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000001 CurState: R_BLD_EAP_AUTH_REQ Event: EV_SEND_EAP_AUTH_REQIKEv2-PROTO-2: (6): Sending EAP requestIKEv2-PROTO-5: Construct Vendor Specific Payload: CISCO-GRANITEIKEv2-PROTO-3: (6): Build. ASA 5510 is static IP and 5506 dynamic IP. It contains: ISAKMP Header (SPI/version/flags), SAi1 (cryptographic algorithm that IKE initiator supports), KEi (DH public Key value of the initiator), and N (Initiator Nonce). With IKEv1, you see a different behavior, because Child SA creation happens during Quick Mode, and the CREATE_CHILD_SA message has a provision to carry the Key Exchange payload that specifies the DH parameters to derive a new shared secret. set transform-set AES-SHA2 set pfs group14 set ikev2-profile profile1 match address ACL_VPN_BAN interface GigabitEthernet0/0/3.109 encapsulation dot1Q 109 ip vrf forwarding ADIENT ip address 201.174.34.139 255.255.255.248 ip flow monitor NFAmonitor input crypto map ADIENT Please help I have this problem too Labels: Routing Protocols 0 Helpful Share Learn more about how Cisco is using Inclusive Language. The address range specifies that all traffic to and from that range is tunneled. The AUTH payload is generated from the shared secret key. Please re-enter' is seen on the AnyConnect client. Authentication is done with EAP. N(Notify payload-optional). This packet contains the credentials entered by the user. As previously mentioned in this symptom, the tunnel previously worked fine but for any reason, it came down and the tunnel has not been able to successfully established again. ASA IKEv2 Debugs for Site-to-Site VPN with PSKs Understand IPsec IKEv1 Protocol Configure Site-to-Site IKEv2 Tunnel between ASA and Router + Show 3 More Contact Cisco Open a Support Case (Requires a Cisco Service Contract) This Document Applies to These Products IPSec Negotiation/IKE Protocols About Cisco Contact Us Careers Meet our Partners The ASA decrypts this response, and the client says that it has received the AUTH payload in the previous packet (with the certificate) and received the first EAP request packet from the ASA. Note: It is important to verify on what packet exchange of the IKE negotiation the IPsec Tunnel fails to quickly analyze what configuration is involved to address the issue effectively. The client also detects the user profile on the ASA. Cisco Asa Site To Site Vpn Ikev 2 Troubleshooting, Expressvpn For Chromecast, Logiciel Vpn Gratuit Illimit, Free Vpn Provider Kodi, Vpn Profile With No Server, Does Nordvpn Work. Ok so the tunnel went down again with same error. The client omits the AUTH payload from message 3 in order to indicate a desire to use extensible authentication. The IKE_SA_INIT message received from the client contains these fields: The ASA verifies and processes the IKE_INIT message. Each IKE packet contains payload information for the tunnel establishment. Releases: Set the diagnostic log level for IKE VPN. The ASA processes this packet. Cisco asa site to site vpn ikev2 troubleshooting This is the subnet that users will get an IP address on when they connect to the SSL VPN . It is indispensable to know the timestamp when the tunnel went down or have an estimated time to look at the debugs. The IKE glossary explains the abbreviations shown on this image as part of the payload content for the packet exchange. Cisco Adaptive Security Appliance (ASA) Version 8.4 or later. Introduction. All but the headers of all the messages that follow are encrypted and authenticated. The first pair of messages is the IKE_SA_INIT exchange. The client initiates a connection to the ASA on port 4500. To Troubleshoot and debug a VPN tunnel you need to have an appreciation of how VPN Tunnels work READ THIS. The client responds to the EAP request with a response. identify the points before the troubleshoot starts: In this example, the troubleshoot does not start with the timestamp when the tunnel goes down. When the client includes an IDi payload but not an AUTH payload, this indicates the client has declared an identity but has not proven it. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. This document does not describe how to pass traffic after a VPN tunnel has been established to the ASA, nor does it include basic concepts of IPSec or IKE. Step 1. This is easy if you control both ends of the ASA VPN tunnel. Since the client now has an IP address from the ASA, the client proceeds to activate the VPN adapter. The ASA: The ASA constructs the response message for IKE_SA_INIT exchange. When cisco ASA initiates the connection, the phase2 comes up and I can connect to devices on the remote side behind the ASA. ****************************************Date : 04/23/2013Time : 16:25:02Type : InformationSource : acvpnagentDescription : Function: CIPsecProtocol::connectTransportFile: .\IPsecProtocol.cppLine: 1629Opened IKE socket from 192.168.1.1:25170 to 10.0.0.1:500****************************************. All rights reserved. The debug iked is enabled and negotiation is displayed. The documentation set for this product strives to use bias-free language. Router 1 initiates the CHILD_SA exchange. Scenario 1: site to site vpn config not working Problem: User have just attempted to configure a test site to site VPN. Open Traffic Monitor. Step 2. Cisco recommends that you have knowledge of the packet exchange for IKEv2. The ASA receives the IKE_SA_INIT message from the client. It might be initiated by either end of the IKE_SA after the initial exchanges are completed. This is the second request sent by the ASA to the client. Initiator receives response from Responder. The client reports the IPSec connection as established. So here's a small reference sheet that you could use while trying to sort such issues. Decrypted packet:Data:252 bytes IKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000004 CurState: R_WAIT_EAP_RESP Event: EV_RECV_AUTHIKEv2-PROTO-3: (6): Stopping timer to wait for auth messageIKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000004 CurState: R_WAIT_EAP_RESP Event: EV_RECV_EAP_RESPIKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000004 CurState: R_PROC_EAP_RESP Event: EV_PROC_MSGIKEv2-PROTO-2: (6): Processing EAP response, Received XML message below from the clientwin3.0.1047IKEv2-PLAT-3: (6) aggrAuthHdl set to 0x2000IKEv2-PLAT-3: (6) tg_name set to: ASA-IKEV2IKEv2-PLAT-3: (6) tunn grp type set to: RAIKEv2-PLAT-1: EAP:Authentication successfulIKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000004 CurState: R_PROC_EAP_RESP Event: EV_RECV_EAP_SUCCESSIKEv2-PROTO-2: (6): Sending EAP status messageIKEv2-PROTO-3: (6): Building packet for encryption; contents are: EAP Next payload: NONE, reserved: 0x0, length: 8 Code: success: id: 3, length: 4IKEv2-PROTO-3: Tx [L 10.0.0.1:4500/R 192.168.1.1:25171/VRF i0:f0] m_id: 0x4IKEv2-PROTO-3: HDR[i:58AFF71141BA436B - r: FC696330E6B94D7F]IKEv2-PROTO-4: IKEV2 HDR ispi: 58AFF71141BA436B - rspi: FC696330E6B94D7F IKEv2-PROTO-4: Next payload: ENCR, version: 2.0 IKEv2-PROTO-4: Exchange type: IKE_AUTH, flags: RESPONDER MSG-RESPONSE IKEv2-PROTO-4: Message id: 0x4, length: 76ENCR Next payload: EAP, reserved: 0x0, length: 48Encrypted data:44 bytesIKEv2-PLAT-4: SENT PKT [IKE_AUTH] [10.0.0.1]:4500->[192.168.1.1]:25171 InitSPI=0x58aff71141ba436b RespSPI=0xfc696330e6b94d7f MID=00000004, IKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000004 CurState: R_PROC_EAP_RESP Event: EV_START_TMRIKEv2-PROTO-3: (6): Starting timer to wait for auth message (30 sec)IKEv2-PROTO-5: (6): SM Trace-> SA: I_SPI=58AFF71141BA436B R_SPI=FC696330E6B94D7F (R) MsgID = 00000004 CurState: R_WAIT_EAP_AUTH_VERIFY Event: EV_NO_EVENT. ASA IPsec VPN debug troubleshooting commands - Cisco Community In our network infrastructure, there are 11 IPsec site-to-site vpn tunnel configured in ASA firewall, of which one of the tunnel is not getting established. IKEv2 must be configured on the source (Cisco CG-OS router) and destination (head-end) routers. As previously mentioned, usually this symptom is addressed to know the root cause of why the tunnel went down. These debug commands are used in this document: *Nov 11 20:28:34.003: IKEv2:Got a packet from dispatcher *Nov 11 20:28:34.003: IKEv2: Processing an item off the pak queue *Nov 11 19:30:34.811: IKEv2:% Getting preshared key by address 10.0.0.2 *Nov 11 19:30:34.811: IKEv2:Adding Proposal PHASE1-prop to toolkit policyle *Nov 11 19:30:34.811: IKEv2:(1): Choosing IKE profile IKEV2-SETUP *Nov 11 19:30:34.811: IKEv2:New ikev2 sa request admitted *Nov 11 19:30:34.811: IKEv2:Incrementing outgoing negotiating sa count by one. Note: The related logs are not usually together printed, there be more information between them not related to the same process. In this scenario, there is an affectation to the network. 06-04-2019 IKEv2-PLAT-4: RECV PKT [IKE_SA_INIT] [192.168.1.1]:25170->[10.0.0.1]:500 InitSPI=0x58aff71141ba436b RespSPI=0x0000000000000000 MID=00000000, IKEv2-PROTO-3: Rx [L 10.0.0.1:500/R 192.168.1.1:25170/VRF i0:f0] m_id: 0x0. If your network is live, make sure that you understand the potential impact of any command. Nonce Ni(optional): If the CHILD_SA is created as part of the initial exchange, a second KE payload and nonce must not be sent. A Notify Payload might appear in a response message (usually specifying why a request was rejected), in an informational exchange (to report an error not in an IKE request), or in any other message to indicate sender capabilities or to modify the meaning of the request. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. For reference: x.x.x.x is remote site y.y.y.y is local site (static ip). However, when the rekey starts the tunnel is not be able to continue and this symptom can be presented or related to. 06:46 PM The Notify Payload, is used to transmit informational data, such as error conditions and state transitions, to an IKE peer. Troubleshoot Debugs on the ASA Debugs on Router Introduction This document describes how to set up a site-to-site Internet Key Exchange version 2 (IKEv2) tunnel between a Cisco Adaptive Security Appliance (ASA) and a router that runs Cisco IOS software. Initiator building IKE_INIT_SA packet. This response packet contains: ISAKMP Header(SPI/ version/flags), IDr(responder's identity), AUTH payload, SAr2(initiates the SA-similar to the phase 2 transform set exchange in IKEv1), and TSi and TSr(Initiator and Responder Traffic selectors). This is what the 'init' EAP response packet contains. IKEv2-PLAT-4: RECV PKT [IKE_AUTH] [192.168.1.1]:25171->[10.0.0.1]:4500 InitSPI=0x58aff71141ba436b RespSPI=0xfc696330e6b94d7f MID=00000005. Tunnel is up on the Responder. *Nov 11 19:30:34.835: IKEv2:KMI message 12 consumed. All rights reserved. 01:50 AM Learn more about how Cisco is using Inclusive Language. Tunnel is up on the Initiator and the status shows. The ASA sends the VPN configuration settings in the 'complete' message to the client and allots an IP address to the client from the VPN pool. If your network is live, ensure that you understand the potential impact of any command. IPsec Tunnel Went Down and It Stays on a Downstate, vEdge IPSec/Ikev2 Tunnel Not Getting Re-initiated After Being Torn Down Due to a DELETE Event, IKEv2 Packet Exchange and Protocol Level Debugging, KEv2 Packet Exchange and Protocol Level Debugging, The Internet Key Exchange (IKE) - RFC 2409, Site-to-Site LAN to LAN IPSec Between vEdge and Cisco IOS, Technical Support & Documentation - Cisco Systems, The IPSec shared key can be derived with the use of DH again to ensure, IPsec tunnel went down and it re-established on its own. 09:39 PM. If it guesses wrong, the CREATE_CHILD_SA exchange fails, and it must retry with a different KEi. The address range specifies that all traffic to and from that range are tunnelled. Note: In this output, unlike in IKEv1, the PFS DH group value appears as "PFS (Y/N): N, DH group: none" during the first tunnel negotiation, but, after a rekey occurs, the right values appear. In IKEv1 there was a clearly demarcated phase1 exchange that consisted of six (6) packets followed by a phase 2 exchange that consisted of three (3) packets; the IKEv2 exchange is variable. The documentation set for this product strives to use bias-free language. This process supports the main mode and aggressive mode. In CLI is also possible to display the current logs/debug information for the path specified. Router 1 then inserts this SA into its SAD. Router 2 receives and verifies the authentication data received from Router 1. IPsec peer IP address (Tunnel destination). These parameters are identical to the one that was received from ASA1. The ASA receives the IKE_AUTH message from the client. Note: Logs from the Diagnostics and Reporting Tool (DART) are generally very chatty, so certain DART logs have been omitted in this example due to insignificance. Note: There are multiples DELETES packets on an IPsec negotiation, and the DELETE for CHILD_SA is an expected DELETE for a REKEY process, this issue is seen when a pure IKE_SA DELETE packet is received without any particular IPsec negotiation. The fault is shown no to be a configuration or ASA related at all. #address 10.0.0.2. The ASA sends the AUTH payload in order to request user credentials from the client. IKEv1 phase 1 negotiation aims to establish the IKE SA. The IKE_AUTH packet contains: ISAKMP Header(SPI/ version/flags), IDi(initiator's identity), AUTH payload, SAi2(initiates the SA-similar to the phase 2 transform set exchange in IKEv1), and TSi and TSr (Initiator and Responder Traffic selectors): They contain the source and destination address of the initiator and responder respectively for forwarding/receiving encrypted traffic. The connection is entered into the Security Association (SA) database, and the status is REGISTERED. This EAP response has the 'config-auth' type of 'auth-reply.' IKE debugs show the same behavior and it is constantly repeated, so it is possible to take a part of the information and analyze it: CREATE_CHILD_SA means a rekey, with the purpose for the new SPIS to be generated and exchanged between the IPsec endpoints. Troubleshoot Router Debugs These debug commands are used in this document: deb crypto ikev2 packet deb crypto ikev2 internal CHILD_SA Debugs This exchange consists of a single request/response pair and was referred to as a phase 2 exchange in IKEv1. The ASA receives the response packet from the client, which has the 'config-auth' type of 'ack'. 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