cisco tunnel source multiple interfaces

terminal, 3. Many tunneling techniques are implemented using technology-specific commands, and links are provided to the appropriate technology modules. Session session_number destination interfaces gigabitEthernet interface-id command to create a . www.cisco.com/go/cfn. Stack Overflow for Teams is moving to its own domain! After configuring tunnel,two tunnel endpoints can see each other can verify using an icmp echo from one end. The routing table decides to which VPN peer the traffic is sent. An example of a transform is the ESP with the 256-bit AES encryption algorithm and the AH protocol with the HMAC-SHA authentication algorithm. I've tried adding a pool and associating it with access-list 1; I also created another access-list 15 with the same LAN ip network address, but they all just seem to "replace" the NAT scheme so that my static routes work for fe0/1 (tested from LAN with ping static.routed.ip.address), but stop working for Dialer1 (fe0/0/0). No it is not. The IP address configured on the tunnel interface is irrelevant, but it must be configured with some value. The Sharing IPsec with Tunnel Protection feature is required in some DMVPN configurations. Cisco IOS XE Everest16.5.1 I think the problem from what you provided is maybe that your nat access lists specify only the source address so it doesn't know which pool to apply it to. It is backwards compatible with crypto map-based and other policy-based implementations. It has the ability to apply features like Quality of Service (QoS), Zone-Based Firewall (ZBF), Network Address Translation (NAT), and Netflow on a per-tunnel basis. Please use Cisco.com login. interfacetunnel-ipid no interfacetunnel-ipid Syntax Description id Specifies the tunnel interface identifier. GRE tunneling can also be used to encapsulate non-IP traffic into IP and send it over the Internet or IP network. I think the answer lies with route-map as quoted here from the following Cisco support Website: tunnel protection IPsec profile. The IPsec SA is established either by IKE or by manual user configuration. For information on configuring GRE tunnels, see the Interface and Hardware Component Configuration Guide for Cisco NCS 6000 Series Routers . Please use Cisco.com login. All of the devices used in this document started with a cleared (default) configuration. Options. transform--List of operations performed on a data flow to provide data authentication, data confidentiality, and data compression. 12:55 PM New here? ACI encapsulate all traffic in VXLAN as soon as the packet/frame hits the switch. PBR can use the IPsec policy ACL to match the traffic to be routed to the VTI. The information in this document is based on an Integrated Services Router (ISR) 4351 with Cisco IOS XE Release 16.12.01a . SA--security association. IKE can negotiate and establish its own SA. Find answers to your questions by entering keywords or phrases in the Search bar above. Unless noted otherwise, subsequent releases of that software release train also support that feature. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The The advantages of VTI over crypto map include: The administrator must ensure that the routing for remote networks points towards the tunnel interface. i.e. Reverse-route is optionally configured to have the static routes for remote networks automatically added to the routing table: Configure the tunnel interface. In order to verify if the tunnel has been negotiated successfully, the tunnel interface status can be checked. Why does Q1 turn on and Q2 turn off when I apply 5 V? Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms An account on Cisco.com is not required. (1110R). Could the Revelation have happened right when Jesus died? If it does not match, it is not encrypted and is sent in clear text out of the tunnel source interface. This feature allows you to configure the source and destination of a tunnel to belong to any Virtual Private Network (VPN) routing and forwarding (VRF) table. Cisco recommends that you have knowledge of an IPsec VPN configuration on Cisco IOS XE routers. A hybrid protocol that implements Oakley key exchange and Skeme key exchange inside the ISAKMP framework. Each packet is checked against the configured IPsec policy and must match the crypto ACL. You can observe that tunnel interfaces are being used when issue the command "show endpoint ip <IP> or mac <MAC>", once obtained the tunnel interface, you can then find out the IP address via "show interface tunnelx", and then issue "acidiag fnvread | grep <tunnel IP>" to find out which switch the tunnel IP is on. Device(config-if)# tunnel source Ethernet 0. From my point of view your config is OK. Edited by Admin February 16, 2020 at 4:36 AM Tunnel source command Doing some DMVPN labbing and had an issue where the spokes would not register with the hub / tunnels would not form with the hub while the tunnel source was configured as the interface. Statistics for such drops can be seen with the show platform hardware qfp active statistics drop command: In case iVRF is different than fVRF, the packets that enter the tunnel in iVRF, and do not match the IPsec policy, exit the tunnel source interface in fVRF in clear text. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. The following command was introduced or modified: In case the same internal VRF (iVRF) and front VRF (fVRF)is used (iVRF = fVRF), this results in a routing loop and the packets are dropped with a reason Ipv4RoutingErr. configure So for example maybe something like: I think you might find this cisco document helpful, it includes both route-map and traditional acl approaches. The Sharing IPsec with Tunnel Protection feature allows sharing an Internet Protocol Security (IPsec) session between two or more generic routing encapsulation (GRE) tunnel interfaces. However you can add an additional GRE interface using the new physical interface. However, machines on the LAN cannot get out on fe0/1 (ping static.routed.ip.address doesn't work). This type of configuration is also called a policy-based VPN. Please reference the following articles for more information on "how": Think of tunnel interfaces as a "next-hop" for reaching a specific destination. In main site there are 2 routers (these are DMVPN hubs). Remove the crypto map from the interface: Create the IPsec profile. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Did you try using some debug command as well as some show commands like Kyle Brandt suggest ? I believe this is working ok -- I can traceroute from the IOS shell and it's going out fe0/1. Hard to say without seeing more of the config, but if you are only routing based on the destination IP address and don't want to route based on the source address I don't believe you need route maps but that is what I have used in the past. The documentation set for this product strives to use bias-free language. These are the steps required to migrate to multi-SA VTI: Use this section in order to confirm that your configuration works properly. This example uses the dual-hub router, dual Dynamic Multipoint (DM) VPN topology as shown in the figure below, having the following attributes: Hub 1 and Hub 2 configurations are similar, except that each hub belongs to a different DMVPN. @radius: it feels like there's a NAT configuration missing for the fe0/1 interface (the static WAN interface) -- because I'm not specifying any NAT config for it, how would the router "know" what IP to overload as in the NAT table when a private IP wants to route out through that fe0/1 (200.200.200.2) interface? To learn more, see our tips on writing great answers. The tunnels stay up all the time, even if there is no interesting traffic. 08-16-2017 01:44 PM. 03-01-2019 Under the Fabric, below each node, (Spine or Leaf) I could see a number of tunnel Interfaces configured. 1. Multi-SA VTI is a replacement for the crypto map-based (policy-based) VPN configuration. So routing for your GRE tunnel should never be via GRE tunnel, it needs to go out exiting interface that is the other side's source address. Depending on if you are using some integration with opflex, it may be possible to learn endpoints via tunnels as well as locally via some VPC or interface. Find answers to your questions by entering keywords or phrases in the Search bar above. Both routers are preconfigured with the Internet Key Exchange Version 1 (IKEv1) crypto map-based solution: In order to migrate Router A to a multi-SA VTI configuration, complete these steps. On the crypto-data plane, the decrypted and GRE decapsulated packets are demultiplexed to the appropriate tunnel interface by the GRE module using a local address, remote address, and optional tunnel key information. Shared tunnel interfaces have a single underlying cryptographic SADB, cryptographic map, and IPsec profile in the Dynamic Multipoint Virtual Private Network (DMVPN) configuration. Hello Everyone, Please see attached for reference: I can't seems to ping the other end of the tunnel (R5) if I use a loopback interface as my Tunnel Source. The Cisco implementation of NHRP supports the IETF draft version 11 of NBMA NHRP. Learn more about how Cisco is using Inclusive Language. It does not refer to using IPsec in tunnel mode. 06-09-2017 Regex: Delete all lines before STRING, except one particular line, Book where a girl living with an older relative discovers she's a robot. why is there always an auto-save file in the directory where the file I am editing? Customers Also Viewed These Support Documents, Application Centric Infrastructure Resources. ip nat inside source list 1 interface FastEthernet0/1 overload but that kills outbound NAT for the Dialer1 (default route) and thus all other outbound traffic. Unlike with crypto maps, the multi-SA VTI tunnels come up automatically regardless of whether data traffic that matches the crypto ACL flows over the router or not. NHRP--Next Hop Resolution Protocol. Be careful with your routing to send the right traffic out the right interface. 3. - edited shared. The migration process is also described. GRE Tunnel Interface Commands This module describes the command line interface (CLI) commands for configuring GRE tunnel interfaces on the Cisco NCS 6000 Series Router. Please clarify on the tunnel interfaces, how they are configured and how to we check the communication between nodes via tunnels, why a MAC or End Point is getting learnt via the Tunnel. For a multipoint GRE interfaces where tunnel destination is not configured, the pair (tunnel source and tunnel key) must be unique. Stack Exchange network consists of 182 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. http://www.cisco.com/cisco/web/support/index.html. In a dual-hub dual-Dynamic Multipoint VPN topology, it is possible to have two or more generic route encapsulation (GRE) tunnel sessions (same tunnel source and destination, but different tunnel keys) between the same two endpoints. To view a list of Cisco trademarks, go to this URL: I also have NAT working for Dialer1; machines on the LAN can get out without issue. Use Cisco Feature Navigator to find information about platform support and Cisco software image support. The last two columns - Status and Protocol - show a status of up when the tunnel is operational: More details about the current crypto session status can be found in the show crypto session output. 2022 Cisco and/or its affiliates. There are three necessary steps in configuring a tunnel interface: Specify the tunnel interface interface tunnel-ipsecidentifier. Device(config-if)# tunnel protection IPsec profile vpnprof shared. IPsec--IP security. No it is not. Why is SQL Server setup recommending MAXDOP 8 here? In the case of VTIs, each VPN tunnel is represented by a separate logical tunnel interface. "show interface tunnelx", and then issue"acidiag fnvread | grep " to find out which switch the tunnel IP is on. This module describes the various types of tunneling techniques available using Cisco IOS software. SUMMARY STEPS 1. config t 2. interface tunnel number 3. tunnel source {ip-address | interface-name} 4. tunnel destination {ip-address | host-name} 5. tunnel use-vrf vrf-name 6. show interfaces tunnel number Horror story: only people who smoke could see some monsters. Use these resources to familiarize yourself with the community: There is currently an issue with Webex login, we are working to resolve. Multi-SA VTI is a replacement for the crypto map-based (policy-based) VPN configuration. In hub and spoke topologies, we can use VTIs (Virtual Tunnel Interface) to simplify our configuration. An account on Cisco.com is not required. The crypto map Access Control List (ACL) entries are used to match the traffic to be sent to a specific VPN peer. Ensure that you have enabled the tunneling feature. 05:15 AM, I have 4 Spine switches and 16 leaf switches in my ACI environment. Both the tunnel source and the tunnel destination must exist within the same VRF. Secondly, I could see that in a VRF the same IP address is configured across leafs as a Default Gateway of various Bridged Domains. The information in this document was created from the devices in a specific lab environment. If the letter V occurs in a few native words, why isn't it included in the Irish Alphabet? www.cisco.com/go/trademarks. The Session status of UP-ACTIVE indicates that the IKE session has been negotiated properly: Verify that the routing to the remote network points over the correct tunnel interface: This section provides information you can use in order to troubleshoot your configuration. Hub 1 has the following DMVPN configuration: Hub 2 has the following DMVPN configuration: Spoke 1 has the following DMVPN configuration: Spoke 2 has the following DMVPN configuration: Spoke 1 displays the following output for its DMVPN configuration: Implementing DMVPN with IPsec VPN solution, Dynamic Multipoint IPsec VPNs (Using Multipoint GRE/NHRP to Scale IPsec VPNs), Security Architecture for the Internet Protocol. - edited rev2022.11.3.43005. Updated the Frequently Asked Questions section with information on what happens in a VRF-aware configuration. In order to troubleshoot the IKE protocol negotiation, use these debugs: Note: Refer to Important Information on Debug Commands before you use debug commands. The VRF table defines the VPN membership of a customer site attached to the network access server (NAS). Support for this feature is available in Cisco IOS XE Release 16.12 and later. interface tunnel-ip Configures an IP-in-IP tunnel interface. LWC: Lightning datatable not displaying the data stored in localstorage, Saving for retirement starting at 68 years old. Tunnels to different peers are configured under the same crypto map. Because supported tunnels are point-to-point links, you must configure a separate tunnel for each link. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental. To remove this configuration, use the noprefix of the command. It is also not possible to decide under which tunnel interface an IPsec Quick Mode (QM) request must be processed and bound when two tunnel interfaces use the same tunnel source. When I checked in all the leaf and spine switches, I do not find the tunnel destination IP address to be configured anywhere. This direct configuration allows users to have solid control on the application of the features in the pre- or post-encryption path. This module describes the configuration of Tunnel-IPSec interfaces on the Cisco NCS 6000 Series Router. Both IPsec and IKE require and use SAs to identify the parameters of their connections. Use these resources to familiarize yourself with the community: There is currently an issue with Webex login, we are working to resolve. The migration process is also described. Yes, all of those features are supported the same way as on regular VTI tunnels. Command Modes Interface configuration (config-if) Command History Usage Guidelines You cannot configure two tunnels to use the same encapsulation mode with exactly the same source and destination addresses. The Cisco implementation of NHRP supports IP Version 4, Internet Packet Exchange (IPX) network layers, and, at the link layer, ATM, Ethernet, SMDS, and multipoint tunnel networks. GRE Tunnels: tunnel source loopback. Such routes can also be added manually. This document describes how to configure a multi-security association (Multi-SA) Virtual Tunnel Interface (VTI) on Cisco routers with Cisco IOS XE software. moquery -c fabricExplicitGEp -f 'fabric.ExplicitGEp.virtualIp=="10.0.240.67/32"', As Gabriel mentioned, they are VTEP in VXLAN term. What happens if traffic is routed through the VTI, but the source or destination of the traffic does not match the crypto ACL configured as an IPsec policy for this tunnel? I should clarify that yes, I do need to NAT overload out both interfaces: I chose to setup static routes over policy routes because I don't really care what the source IP/mask is, but the destination: any LAN packet that matches the destination address of my static routes needs to go out the fe0/1 WAN interface. https://supportforums.cisco.com/docs/DOC-3987. interface-type number}, 5. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. A few responses given my assumptions on what you are asking. View with Adobe Reader on a variety of devices, View in various apps on iPhone, iPad, Android, Sony Reader, or Windows Phone, View on Kindle device or Kindle app on multiple devices, Migration of a Crypto Map-Based IKEv1 Tunnel to a Multi-SA sVTI, Migration of a Crypto Map Based IKEv2 Tunnel to a Multi-SA sVTI, Migration of a VRF-Aware Crypto Map to a Multi-SA VTI. If there are previously configured more specific routes, that point towards a physical interface instead of the tunnel interface, these must be removed. All rights reserved. Is it possible to assign a single GRE tunnel to two source interfaces? tunnel I believe this is working ok -- I can traceroute from the IOS shell and it's going . Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. The Tunnel-IPSec interface provides secure communications over otherwise unprotected public routes. Symptom: IPSec SA fails to be installed in database.Conditions: IKEv2 tunnel sourced from interface which is unstable. Configure Multiple Tunnel Interfaces on a vEdge Router On a vEdge router, you can configure up to eight tunnel interfaces in the transport interface (VPN 0). For example, an IPsec SA defines the encryption algorithm (if used), the authentication algorithm, and the shared session key to be used during the IPsec connection. IKE provides authentication of the IPsec peers, negotiates IPsec keys, and negotiates IPsec security associations. The reason we would want to do this temporarily is to transition our DMVPN public addresses from one IP space to another. What is interesting for me , I can reach spokes from both hubs without using tunnel key command nowhere. Are features like VRF, NAT, QoS, and so on, supported on multi-SA VTI? Ethernet support is unnecessary (and not provided) for IPX. Sets source IP address or source interface type number for a tunnel interface. Can an autistic person with difficulty making eye contact survive in the workplace? What is the limit to my entering an unlocked home of a stranger to render aid without explicit permission. When the migration is complete, you will access your Teams at stackoverflowteams.com, and they will no longer appear in the left sidebar on stackoverflow.com.

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