You cannot use PSK for authentication of a Remote Access FlexVPN, see this screenshot below from Cisco live presentation BRKSEX-2881. Find answers to your questions by entering keywords or phrases in the Search bar above. Tunnel is up on the Responder. Components Used The information in this document is based on these software and hardware versions: Internet Key Exchange Version 2 (IKEv2) Cisco IOS 15.1 (1)T or later Source Interface in my setup is the WAN Interface connected to the Internet. We may get it in march release if everything will be on track. what i am missing here. Windows or MAC (native or AC) client can only use Certificates or EAP. This is the CREATE_CHILD_SA response. Do you had to apply some NAT config? Let me ask you something - what format do you enter user/domain information in the client? Can you point specifically on the vManage how we can do that? This mode is more secure, and uses three . Hence, you would see 'PFS (Y/N): N, DH group: none' until the first rekey. Note. No action taken. ", https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/Security/Security-Book/security-book_chapter_01.html?bookSearch=true#c_Configuring_IKE_Enabled_IPsec_Tunnels_12216.xml. description Cisco AnyConnect IKEv2 ip unnumbered GigabitEthernet0/0 tunnel mode ipsec ipv4 tunnel protection ipsec profile staff Take a break, you have now completed the main config on the router, and its time to move onto configuration relating to the client. I'll log a TAC case next. Palo Alto IP: 1.1.1.1 Cisco ASA IP: 2.2.2.2 Cisco ASA iKev2 and IPsec parameters: Failed to remove peer correlation entry from cikePeerCorrTable. I'd be interested to hear if you have the same issue? Local Type = 0. Relevant Configuration:crypto ikev2 proposal PHASE1-prop encryption 3des aes-cbc-128 integrity sha1 group 2crypto ikev2 keyring KEYRNG peer peer1 address 10.0.0.2 255.255.255.0 hostname host1 pre-shared-key local cisco pre-shared-key remote cisco, *Nov 11 19:30:34.814: IKEv2:Got a packet from dispatcher *Nov 11 19:30:34.814: IKEv2:Processing an item off the pak queue *Nov 11 19:30:34.814: IKEv2:New ikev2 sa request admitted *Nov 11 19:30:34.814: IKEv2:Incrementing incoming negotiating sa count by one, *Nov 11 19:30:34.814: IKEv2:Next payload: SA, version: 2.0 Exchange type: IKE_SA_INIT, flags: INITIATOR Message id: 0, length: 344 Payload contents: SA Next payload: KE, reserved: 0x0, length: 56 last proposal: 0x0, reserved: 0x0, length: 52 Proposal: 1, Protocol id: IKE, SPI size: 0, #trans: 5 last transform: 0x3, reserved: 0x0: length: 8 type: 1, reserved: 0x0, id: 3DES last transform: 0x3, reserved: 0x0: length: 12 type: 1, reserved: 0x0, id: AES-CBC last transform: 0x3, reserved: 0x0: length: 8 type: 2, reserved: 0x0, id: SHA1 last transform: 0x3, reserved: 0x0: length: 8 type: 3, reserved: 0x0, id: SHA96 last transform: 0x0, reserved: 0x0: length: 8 type: 4, reserved: 0x0, id: DH_GROUP_1024_MODP/Group 2 KE Next payload: N, reserved: 0x0, length: 136 DH group: 2, Reserved: 0x0 N Next payload: VID, reserved: 0x0, length: 24 *Nov 11 19:30:34.814: IKEv2:Parse Vendor Specific Payload: CISCO-DELETE-REASON VID Next payload: VID, reserved: 0x0, length: 23 *Nov 11 19:30:34.814: IKEv2:Parse Vendor Specific Payload: (CUSTOM) VID Next payload: NOTIFY, reserved: 0x0, length: 21 *Nov 11 19:30:34.814: IKEv2:Parse Notify Payload: NAT_DETECTION_SOURCE_IP NOTIFY(NAT_DETECTION_SOURCE_IP) Next payload: NOTIFY, reserved: 0x0, length: 28 Security protocol id: IKE, spi size: 0, type: NAT_DETECTION_SOURCE_IP *Nov 11 19:30:34.814: IKEv2:Parse Notify Payload: NAT_DETECTION_DESTINATION_IP NOTIFY(NAT_DETECTION_DESTINATION_IP) Next payload: NONE, reserved: 0x0, length: 28 Security protocol id: IKE, spi size: 0, type: NAT_DETECTION_DESTINATION_IP, *Nov 11 19:30:34.814: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (R) MsgID = 00000000 CurState: IDLE Event:EV_RECV_INIT *Nov 11 19:30:34.814: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (R) MsgID = 00000000 CurState: R_INIT Event:EV_VERIFY_MSG *Nov 11 19:30:34.814: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (R) MsgID = 00000000 CurState: R_INIT Event:EV_INSERT_SA *Nov 11 19:30:34.814: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (R) MsgID = 00000000 CurState: R_INIT Event:EV_GET_IKE_POLICY *Nov 11 19:30:34.814: IKEv2:Adding Proposal default to toolkit policy *Nov 11 19:30:34.814: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (R) MsgID = 00000000 CurState: R_INIT Event:EV_PROC_MSG *Nov 11 19:30:34.814: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (R) MsgID = 00000000 CurState: R_INIT Event: EV_DETECT_NAT *Nov 11 19:30:34.814: IKEv2:(SA ID = 1):Process NAT discovery notify *Nov 11 19:30:34.814: IKEv2:(SA ID = 1):Processing nat detect src notify *Nov 11 19:30:34.814: IKEv2:(SA ID = 1):Remote address matched *Nov 11 19:30:34.814: IKEv2:(SA ID = 1):Processing nat detect dst notify *Nov 11 19:30:34.814: IKEv2:(SA ID = 1):Local address matched *Nov 11 19:30:34.814: IKEv2:(SA ID = 1):No NAT found *Nov 11 19:30:34.814: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (R) MsgID = 00000000 CurState: R_INIT Event: EV_CHK_CONFIG_MODE *Nov 11 19:30:34.814: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (R) MsgID = 00000000 CurState: R_BLD_INIT Event: EV_SET_POLICY *Nov 11 19:30:34.814: IKEv2:(SA ID = 1):Setting configured policies *Nov 11 19:30:34.814: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (R) MsgID = 00000000 CurState: R_BLD_INIT Event: EV_CHK_AUTH4PKI *Nov 11 19:30:34.814: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (R) MsgID = 00000000 CurState: R_BLD_INIT Event: EV_PKI_SESH_OPEN *Nov 11 19:30:34.814: IKEv2:(SA ID = 1):Opening a PKI session *Nov 11 19:30:34.815: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (R) MsgID = 00000000 CurState: R_BLD_INIT Event:EV_GEN_DH_KEY *Nov 11 19:30:34.815: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (R) MsgID = 00000000 CurState: R_BLD_INIT Event: EV_NO_EVENT *Nov 11 19:30:34.815: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (R) MsgID = 00000000 CurState: R_BLD_INIT Event:EV_OK_RECD_DH_PUBKEY_RESP *Nov 11 19:30:34.815: IKEv2:(SA ID = 1):Action: Action_Null *Nov 11 19:30:34.815: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (R) MsgID = 00000000 CurState: R_BLD_INIT Event:EV_GEN_DH_SECRET *Nov 11 19:30:34.822: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (R) MsgID = 00000000 CurState: R_BLD_INIT Event: EV_NO_EVENT *Nov 11 19:30:34.822: IKEv2:%Getting preshared key by address 10.0.0.1 *Nov 11 19:30:34.822: IKEv2:Adding Proposal default to toolkit policy *Nov 11 19:30:34.822: IKEv2:(2): Choosing IKE profile IKEV2-SETUP *Nov 11 19:30:34.822: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (R) MsgID = 00000000 CurState: R_BLD_INIT Event: EV_OK_RECD_DH_SECRET_RESP *Nov 11 19:30:34.822: IKEv2:(SA ID = 1):Action: Action_Null *Nov 11 19:30:34.822: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (R) MsgID = 00000000 CurState: R_BLD_INIT Event:EV_GEN_SKEYID *Nov 11 19:30:34.822: IKEv2:(SA ID = 1):Generate skeyid *Nov 11 19:30:34.822: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (R) MsgID = 00000000 CurState: R_BLD_INIT Event: EV_GET_CONFIG_MODE *Nov 11 19:30:34.822: IKEv2:IKEv2 responder - no config data to send in IKE_SA_INIT exch *Nov 11 19:30:34.822: IKEv2:No config data to send to toolkit: *Nov 11 19:30:34.822: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (R) MsgID = 00000000 CurState: R_BLD_INIT Event: EV_BLD_MSG *Nov 11 19:30:34.822: IKEv2:Construct Vendor Specific Payload: DELETE-REASON *Nov 11 19:30:34.822: IKEv2:Construct Vendor Specific Payload: (CUSTOM) *Nov 11 19:30:34.822: IKEv2:Construct Notify Payload: NAT_DETECTION_SOURCE_IP *Nov 11 19:30:34.822: IKEv2:Construct Notify Payload: NAT_DETECTION_DESTINATION_IP *Nov 11 19:30:34.822: IKEv2:Construct Notify Payload: HTTP_CERT_LOOKUP_SUPPORTED. A Notify Payload may 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.If this CREATE_CHILD_SA exchange is rekeying an existing SA other than the IKE_SA, the leading N payload of type REKEY_SA MUST identify the SA being rekeyed. Finding Feature Information Prerequisites for Configuring Internet Key Exchange Version 2 I had the same Firebox and RADIUS server working for IPSec MUVPN, but not for IKEv2. It's in roadmap. Edit your Feature Template for the VPN Interface Ethernet that is applied to your physical interface in VPN0.Under ACL/QOS add a IPv4 Ingress Access List using the name of the ACL you created in the first step. The Notify Payload, is used to transmit informational data, such as error conditions and state transitions, to an IKE peer. As far as I'm aware that feature is not supported on cEdge platforms, you can only use IPsec tunnels on the Service Side VPN. It might be initiated by either end of the IKE_SA after the initial exchanges are completed. This exchange consists of a single request/response pair and was referred to as a phase 2 exchange in IKEv1. 01:52 PM The address range specifies that all traffic to and from that range is tunneled. Router 2 receives and verifies the authentication data received from Router 1. When i run debug on Cisco ASA i found following, also when tunnel is up i am seeing following messaged in debugging, not sure what is going on. This document describes Internet Key Exchange version 2 (IKEv2) debugs on Cisco IOS when a pre-shared key (PSK) is used. This is the CREATE_CHILD_SA request. "You can create the IPsec tunnel in the transport VPN (VPN 0) and in any service VPN (VPN 1 through 65530, except for 512). INFO_R Event: EV_CHK_INFO_TYPE IKEv2-PROTO-5: (99): SM Trace-> SA: I . : crypto ikev2 profile default . This section lists the configurations used in this document. Initiator receives response from Responder. My template for 'VPN Interface IPsec' looks like this: Then, this template is added under the Service VPN : I thought it was all working fine, however I now have a new problem.IKEv2 is working for Phase 1, but IPSEC is failing.For some reason the ISR4K is creating 16 SA's whilst Zscaler only support a maximum of 8 SA's, therefore the tunnel is currently unusable. These parameters are identical to the one that was received from ASA1. *Nov 11 19:30:34.835: IKEv2:KMI message 12 consumed. An attacker could exploit this vulnerability by sending crafted IKEv2 SA-Init . The CHILD_SA packet typically contains: Router 1 receives the response packet from Router 2 and completes activating the CHILD_SA. Cisco Community Technology and Support Security VPN Remote Access IKEv2 Auth exchange failed 33016 5 2 Remote Access IKEv2 Auth exchange failed Go to solution mustafa.chapal Beginner 08-08-2018 01:52 PM - edited 03-12-2019 05:29 AM Hi, Zscaler support IP-SLA HTTP probes to check the cloud proxy health, on traditional routers you are able to use 'track' features to, for example, change the admin distance of a static route based on the results of the IP-SLA test. 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. I shared this with TAC too. 0 Helpful Share Reply JW_UK Beginner In response to JW_UK Options 09-28-2019 03:19 AM The difference between IKEv1 and IKEv2 is that, in the latter, the Child SAs are created as part of AUTH exchange itself. The connection uses a custom IPsec/IKE policy with the UsePolicyBasedTrafficSelectors option, as described in this article.. High Performance gateway uses IKEv2 and have applied the following IKE policy on Azure Gateway. 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), KEi (Key-optional): The CREATE_CHILD_SA request might optionally contain a KE payload for an additional DH exchange to enable stronger guarantees of forward secrecy for the CHILD_SA. tanyatamir53355. E.g. Thanks. They contain the source and destination address of the initiator and responder respectively for forwarding/receiving encrypted traffic. Client Related Configuration If this CREATE_CHILD_SA exchange is rekeying an existing SA other than the IKE_SA, the leading N payload of type REKEY_SA must identify the SA being rekeyed. Cisco recommends that you have knowledge of the packet exchange for IKEv2. Create VPN Gateway Policy (Phase1) To create a Phase1 VPN policy, go to Configuration -> VPN -> IPSec VPN and click on the " VPN Gateway " tab. This is reposted from the Networking Academy area since there were no replies. For more information, refer to IKEv2 Packet Exchange and Protocol Level Debugging. Accepted Solutions. Router 1 receives the IKE_SA_INIT response packet from Router 2. The packet exchange in IKEv2 is radically different from packet exchange in IKEv1. Cisco recommends that you have knowledge of the packet exchange for IKEv2. First pair of messages is the IKE_SA_INIT exchange. Looks like its working after I added the ACL to the outside interface. Local Address = 0.0.0.0. Tunnel is up on the Initiator and the status shows. I think i have the problem with the Source Interface (i receive"IKEv2-ERROR:Address type not supported" in log). 1 Accepted Solution. IKEv2 Payload Types Transform Type Values IKEv2 Transform Attribute Types Transform Type 1 - Encryption Algorithm Transform IDs Transform Type 2 - Pseudorandom Function Transform IDs Transform Type 3 - Integrity Algorithm Transform IDs Transform Type 4 - Key Exchange Method Transform IDs Transform Type 5 - Extended Sequence Numbers Transform IDs Hi, made some more tests and my problem is the following, IPSec tunnel can be established if remote end is configured without any specific encryption domains for the communication and with a transport network within the tunnel (for routing purpose - like in GRE Tunnel). Create an ACL in Policies > Local Policy > Access Control ListsPermit port 500I also have the Default Action as Accept in my POC.Copy the ACL name (CTRL C) youll need it for the next step. Communication over the IPSec Tunnel should be done via VPN1. The vulnerability is due to incorrect handling of crafted IKEv2 SA-Init packets. Same in every possible way. if my config was wrong then tunnel shouldn't come up when Cisco ASA sending traffic. IOS XE routers must source IPSEC interfaces from the Service side VPN (not VPN0), but also, it is necessary to add a inbound IPv4 ACL to the Interface in VPN0 to permit UDP 500 (IPSEC) and if using NAT UDP 4500 as well.After the tunnel is established you can add a IPv4 static route on the Service side with a next hop of the Tunnel interface to route traffic via the tunnel. In the IKEv1 Phase 1 settings, you can select one of these modes: Main Mode. Help would really be appreciated. My assumption is that although the IPSEC is created on the service side, by sourcing the tunnel from the interface with a public IP address in VPN0, the cEdge would VRF jump to VPN0. IKEv2 Packet Exchange and Protocol Level Debugging, Technical Support & Documentation - Cisco Systems, Router 1 receives a packet that matches the crypto acl for peer ASA 10.0.0.2. Doesn't work for me. Its a bug where the ZScaler dumps an IP address based on the config_exchange request sent by cEdge devices. Update: This was a version error, using wrong version of anyconnect, this has now been resolved. Relevant Configuration:crypto ikev2 proposal PHASE1-prop encryption 3des aes-cbc-128 integrity sha1 group 2 crypto ikev2 keyring KEYRNG peer peer2 address 10.0.0.1 255.255.255.0 hostname host2 pre-shared-key local cisco pre-shared-key remote cisco, *Nov 11 19:30:34.822: IKEv2:(SA ID = 1):Next payload: SA, version: 2.0 Exchange type:IKE_SA_INIT,flags:RESPONDER MSG-RESPONSEMessage id: 0, length: 449 Payload contents: SANext payload: KE, reserved: 0x0, length: 48 last proposal: 0x0, reserved: 0x0, length: 44 Proposal: 1, Protocol id: IKE, SPI size: 0, #trans: 4 last transform: 0x3, reserved: 0x0: length: 12 type: 1, reserved: 0x0, id: AES-CBC last transform: 0x3, reserved: 0x0: length: 8 type: 2, reserved: 0x0, id: SHA1 last transform: 0x3, reserved: 0x0: length: 8 type: 3, reserved: 0x0, id: SHA96 last transform: 0x0, reserved: 0x0: length: 8 type: 4, reserved: 0x0, id: DH_GROUP_1024_MODP/Group 2 KENext payload: N, reserved: 0x0, length: 136 DH group: 2, Reserved: 0x0 NNext payload: VID, reserved: 0x0, length: 24 VID Next payload: VID, reserved: 0x0, length: 23 VID Next payload: NOTIFY, reserved: 0x0, length: 21 NOTIFY(NAT_DETECTION_SOURCE_IP) Next payload: NOTIFY, reserved: 0x0, length: 28 Security protocol id: IKE, spi size: 0, type: NAT_DETECTION_SOURCE_IP NOTIFY(NAT_DETECTION_DESTINATION_IP) Next payload: CERTREQ, reserved: 0x0, length: 28 Security protocol id: IKE, spi size: 0, type: NAT_DETECTION_DESTINATION_IP CERTREQ Next payload: NOTIFY, reserved: 0x0, length: 105 Cert encoding Hash and URL of PKIX NOTIFY(HTTP_CERT_LOOKUP_SUPPORTED) Next payload: NONE, reserved: 0x0, length: 8 Security protocol id: IKE, spi size: 0, type: HTTP_CERT_LOOKUP_SUPPORTED, *Nov 11 19:30:34.822: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (R) MsgID = 00000000 CurState: INIT_DONE Event: EV_DONE *Nov 11 19:30:34.822: IKEv2:(SA ID = 1):Cisco DeleteReason Notify is enabled *Nov 11 19:30:34.822: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (R) MsgID = 00000000 CurState: INIT_DONE Event: EV_CHK4_ROLE *Nov 11 19:30:34.822: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (R) MsgID = 00000000 CurState: INIT_DONE Event:EV_START_TMR *Nov 11 19:30:34.822: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (R) MsgID = 00000000 CurState: R_WAIT_AUTH Event: EV_NO_EVENT *Nov 11 19:30:34.822: IKEv2:New ikev2 sa request admitted *Nov 11 19:30:34.822: IKEv2:Incrementing outgoing negotiating sa count by one, *Nov 11 19:30:34.823: IKEv2:Got a packet from dispatcher *Nov 11 19:30:34.823: IKEv2:Got a packet from dispatcher *Nov 11 19:30:34.823: IKEv2:Processing an item off the pak queue, I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (R) MsgID = 00000000 CurState: INIT_DONE Event:EV_START_TMR, *Nov 11 19:30:34.823: IKEv2:(SA ID = 1):Next payload: SA, version: 2.0 Exchange type: IKE_SA_INIT, flags:RESPONDER MSG-RESPONSEMessage id: 0, length: 449 Payload contents: SANext payload: KE, reserved: 0x0, length: 48 last proposal: 0x0, reserved: 0x0, length: 44 Proposal: 1, Protocol id: IKE, SPI size: 0, #trans: 4 last transform: 0x3, reserved: 0x0: length: 12 type: 1, reserved: 0x0, id: AES-CBC last transform: 0x3, reserved: 0x0: length: 8 type: 2, reserved: 0x0, id: SHA1 last transform: 0x3, reserved: 0x0: length: 8 type: 3, reserved: 0x0, id: SHA96 last transform: 0x0, reserved: 0x0: length: 8 type: 4, reserved: 0x0, id: DH_GROUP_1024_MODP/Group 2 KENext payload: N, reserved: 0x0, length: 136 DH group: 2, Reserved: 0x0 NNext payload: VID, reserved: 0x0, length: 24 *Nov 11 19:30:34.823: IKEv2:Parse Vendor Specific Payload: CISCO-DELETE-REASON VID Next payload: VID, reserved: 0x0, length: 23 *Nov 11 19:30:34.823: IKEv2:Parse Vendor Specific Payload: (CUSTOM) VID Next payload: NOTIFY, reserved: 0x0, length: 21 *Nov 11 19:30:34.823: IKEv2:Parse Notify Payload: NAT_DETECTION_SOURCE_IP NOTIFY(NAT_DETECTION_SOURCE_IP) Next payload: NOTIFY, reserved: 0x0, length: 28 Security protocol id: IKE, spi size: 0, type: NAT_DETECTION_SOURCE_IP *Nov 11 19:30:34.824: IKEv2:Parse Notify Payload: NAT_DETECTION_DESTINATION_IP NOTIFY(NAT_DETECTION_DESTINATION_IP) Next payload: CERTREQ, reserved: 0x0, length: 28 Security protocol id: IKE, spi size: 0, type: NAT_DETECTION_DESTINATION_IP CERTREQ Next payload: NOTIFY, reserved: 0x0, length: 105 Cert encoding Hash and URL of PKIX *Nov 11 19:30:34.824: IKEv2:Parse Notify Payload: HTTP_CERT_LOOKUP_SUPPORTED NOTIFY(HTTP_CERT_LOOKUP_SUPPORTED) Next payload: NONE, reserved: 0x0, length: 8 Security protocol id: IKE, spi size: 0, type: HTTP_CERT_LOOKUP_SUPPORTED, *Nov 11 19:30:34.824: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (I) MsgID = 00000000 CurState: I_WAIT_INIT Event: EV_RECV_INIT *Nov 11 19:30:34.824: IKEv2:(SA ID = 1):Processing IKE_SA_INIT message *Nov 11 19:30:34.824: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (I) MsgID = 00000000 CurState: I_PROC_INIT Event: EV_CHK4_NOTIFY *Nov 11 19:30:34.824: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (I) MsgID = 00000000 CurState: I_PROC_INIT Event: EV_VERIFY_MSG *Nov 11 19:30:34.824: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (I) MsgID = 00000000 CurState: I_PROC_INIT Event: EV_PROC_MSG *Nov 11 19:30:34.824: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (I) MsgID = 00000000 CurState: I_PROC_INIT Event: EV_DETECT_NAT *Nov 11 19:30:34.824: IKEv2:(SA ID = 1):Process NAT discovery notify *Nov 11 19:30:34.824: IKEv2:(SA ID = 1):Processing nat detect src notify *Nov 11 19:30:34.824: IKEv2:(SA ID = 1):Remote address matched *Nov 11 19:30:34.824: IKEv2:(SA ID = 1):Processing nat detect dst notify *Nov 11 19:30:34.824: IKEv2:(SA ID = 1):Local address matched *Nov 11 19:30:34.824: IKEv2:(SA ID = 1):No NAT found *Nov 11 19:30:34.824: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (I) MsgID = 00000000 CurState: I_PROC_INIT Event: EV_CHK_NAT_T *Nov 11 19:30:34.824: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (I) MsgID = 00000000 CurState: I_PROC_INIT Event: EV_CHK_CONFIG_MODE *Nov 11 19:30:34.824: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (I) MsgID = 00000000 CurState: INIT_DONE Event:EV_GEN_DH_SECRET *Nov 11 19:30:34.831: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (I) MsgID = 00000000 CurState: INIT_DONE Event: EV_NO_EVENT *Nov 11 19:30:34.831: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (I) MsgID = 00000000 CurState: INIT_DONE Event: EV_OK_RECD_DH_SECRET_RESP *Nov 11 19:30:34.831: IKEv2:(SA ID = 1):Action: Action_Null *Nov 11 19:30:34.831: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (I) MsgID = 00000000 CurState: INIT_DONE Event:EV_GEN_SKEYID *Nov 11 19:30:34.831: IKEv2:(SA ID = 1):Generate skeyid *Nov 11 19:30:34.831: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (I) MsgID = 00000000 CurState: INIT_DONE Event: EV_DONE *Nov 11 19:30:34.831: IKEv2:(SA ID = 1):Cisco DeleteReason Notify is enabled *Nov 11 19:30:34.831: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (I) MsgID = 00000000 CurState: INIT_DONE Event: EV_CHK4_ROLE *Nov 11 19:30:34.831: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (I) MsgID = 00000000 CurState: I_BLD_AUTH Event: EV_GET_CONFIG_MODE *Nov 11 19:30:34.831: IKEv2:Sending config data to toolkit *Nov 11 19:30:34.831: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=F94020DD8CB4B9C4 (I) MsgID = 00000000 CurState: I_BLD_AUTH Event: EV_CHK_EAP. The keys used for the encryption and integrity protection are derived from SKEYID and are known as: SK_e (encryption), SK_a (authentication), SK_d is derived and used for derivation of further keying material for CHILD_SAs, and a separate SK_e and SK_a is computed for each direction. crypto ikev2 authorization policy FlexVPN, encryption 3des aes-cbc-128 aes-cbc-192 aes-cbc-256, crypto ipsec transform-set ESP-GCM esp-gcm, crypto ipsec transform-set AES-CBC esp-aes 256 esp-sha256-hmac, crypto ipsec transform-set AES-CBC1 esp-aes esp-sha-hmac, crypto ipsec transform-set AES-CBC2 esp-3des esp-sha-hmac, set transform-set AES-CBC AES-CBC1 AES-CBC2 ESP-GCM, ip local pool FlexVPN 10.7.1.231 10.7.1.239. 05:29 AM. Cisco recommends that you have knowledge of the packet exchange for IKEv2. If this CREATE_CHILD_SA exchange is not rekeying an existing SA, the N payload must be omitted. 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. Use the VPN Interface IPsec feature template to configure IPsec tunnels on Cisco IOS XE service VPNs that are being used for Internet Key Exchange (IKE) sessions. For more information, refer to IKEv2 Packet Exchange and Protocol Level Debugging. Be aware the static route will only be withdrawn from the routing table if the Tunnel goes down. Router 2 builds the response to IKE_AUTH packet that it received from Router 1. I'm unsure if Viptela using IOS XE has this same capability. Thanks again for this article. In my case even after adding the ACL entry there was another step which was needed to fix this tunnel. For a branch office VPN that uses IKEv1, the Phase 1 exchange can use Main Mode or Aggressive Mode.
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