Configure and Verify DIA NAT Tracker and Fallback

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Updated:November 17, 2025
Document ID:222299

Bias-Free Language

The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. 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. Learn more about how Cisco is using Inclusive Language.

    Introduction

    This document describes how to configure and verify DIA NAT Tracker and Fallback on CIsco IOS® XE routers using Cisco Catalyst Manager GUI.

    Prerequisites

    Requirements

    Cisco SD-WAN NAT DIA policy must be configured on branch devices. Please check the Related Information section for instructions on how to Implement Direct Internet Access (DIA) for SD-WAN.

    Components Used

    This document is based on these software and hardware versions:

    • Cisco Catalyst SD-WAN Manager version 20.14.1
    • Cisco Catalyst SD-WAN Controller version 20.14.1
    • Cisco Edge Router version 17.14.01a

    The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, ensure that you understand the potential impact of any command.

    Restrictions for NAT DIA Tracker

    Restrictions for Cisco IOS XE Catalyst SD-WAN Release 17.10.1a and Earlier Releases

    • In Cisco IOS XE Release 17.6.x and earlier, the NAT DIA tracker is not supported on dialer interfaces. From Cisco IOS XE Catalyst SD-WAN Release 17.7.1a, subinterfaces and dialer interfaces support single endpoint and dual endpoint trackers.
    • DNS URL endpoint is not supported on Cisco IOS XE Catalyst SD-WAN devices.
    • You can only apply one tracker or tracker group to an interface.
    • The NAT fallback feature is supported only from Cisco IOS XE Catalyst SD-WAN Release 17.3.2.
    • The IP address of the tunnel with address 169.254.x.x is not supported to track the zScaler endpoint on manual tunnels.
    • You must configure a minimum of two single endpoint trackers to configure a tracker group.
    • A tracker group can incorporate only a maximum of two single endpoint trackers.
    • In Cisco IOS XE Release 17.10.1 and previous releases, you cannot configure IPv4 tracker on a IPv6 interface or vice versa. The tracker wont be active.

    Restrictions for Cisco IOS XE Catalyst SD-WAN Release 17.11.1a

    • API URL endpoint is supported only on IPv6 DIA tracker and not supported on IPv4 DIA tracker.
    • Both IPv4 and IPv6 trackers cannot be used in the same tracker group.
    • You must configure the allow service all command under the TLOC tunnel interface for IPv6 trackers to work with a TLOC tunnel interface.
    • Multiple NAT66 DIA interfaces are not supported.

    Restrictions for Cisco IOS XE Catalyst SD-WAN Release 17.13.1a

    • Name resolution process is not bond to the ET interface. Name resolution is using VPN 0 routing table. It can exit any active interface with proper routing.

    Supported Interfaces for NAT DIA Tracker

    You can configure the NAT DIA tracker for the these interfaces:

    • Cellular Interfaces
      note-icon

      Note: Cellular interfaces do not support negotiated IP addresses.

    • Ethernet Interfaces
    • Ethernet (PPPoE) Interfaces
    • Subinterfaces
    • DSL Dialer Interfaces (PPPoE and PPPoA)
    note-icon

    Note: IPv6 NAT DIA tracker is supported only on physical and subinterfaces of Ethernet interfaces.

    Configure

    Network Diagram

    Network Diagram

    Configurations

    The DIA tracker helps determine if the internet or external network has become unavailable. The NAT DIA Tracking feature is useful when NAT is enabled on a transport interface in VPN 0 to allow data traffic from the router to exit directly to the internet.

    If the internet or external network becomes unavailable, the router continues to forward traffic based on the NAT route in the service VPN. Traffic that is forwarded to the internet gets dropped. To prevent the internet-bound traffic from being dropped, configure the DIA tracker on the edge router to track the status of the transport interface. The tracker periodically probes the interface to determine the status of the internet and return the data to the attach points that are associated with the tracker.

    Step 1. Configure NAT DIA Tracker

    On the Cisco SD-WAN Manager menu, navigate to Configuration > Templates.

    Configure NAT DIA Tracker

     

    Click Feature Templates. Search for the Cisco System feature template in the search bar, click the three dots (...), and click Edit to modify.

    Select Feature Templates

    In the System feature template, click Tracker.

    Select Tracker in Feature Templates

    Click New Endpoint Tracker to configure the tracker parameters.

    Select New Endpoint Tracker to Configure the Tracker Parameters

    Enter the tracker parameters and click Add.

    Name: Name of the tracker. The name can be up to 128 alphanumeric characters. You can configure up to eight trackers.

    Threshold: Duration to wait for the probe to return a response before declaring that the transport interface is down. Range: 100 to 1000 milliseconds. Default: 300 milliseconds.

    Interval: Frequency at which a probe is sent to determine the status of the transport interface. Range: 20 to 600 seconds. Default: 60 seconds (1 minute).

    Multiplier: Number of times a probe can be resent before declaring that the transport interface is down. Range: 1 to 10. Default: 3.

    Tracker Type: Choose Interface to configure the DIA tracker.

    End Point Type: You can select IP address or DNS Name or URL.

    End Point DNS Name: DNS name of the end point. This is the destination in the internet to which the router sends probes to determine the status of the transport interface.

    Click drop-down and select Global to change any default value. 

    Select Global from Drop Down Menu

    Add Endpoint Type and Endpoint DNS Name

     

    Click Update.

    Select Update

    note-icon

    Note: Ensure that you have configured two single endpoint trackers before configuring a tracker group.

    Click Next.

    Select Next to Proceed

    Click devices, and make sure the config is correct. Click Config Diff and Side by Side Diff. Click Configure Devices.

    Ensure Config is Correct

    Select Configure Devices

    vManage successfully configured the device template with the tracker configuration.

    vManage Successfully Configure the Device Template

    Step 2. Bind the Tracker to Transport Interface

    On the Cisco SD-WAN Manager menu, navigate to Configuration > Templates.

    Configure NAT DIA Tracker

    Search for the NAT Transport Interface feature template in the search bar, click the three dots (...), and click Edit to modify.

    Edit Feature Templates

    Click the Advanced tab.

    Select Advanced Tab

    To add the tracker name on the Tracker, select Global from the drop-down menu.

    For Tracker, Select Global

    Enter the tracker name that you created in the system template and click Update.

    Update Tracker Name

    Click Next.

    Select Next

    Click devices, and make sure the config is correct. Click Config Diff and Side by Side Diff. Click Configure Devices.

    Select Devices and Config Diff

    Select Configure Devices for Endpoint Tracker

    vManage has successfully configured the device template.

    View Logs Successful

    Step 3. Enable NAT Fallback on Existing DIA Policy

    Cisco IOS XE Catalyst SD-WAN devices support the NAT fallback feature for Direct Internet Access (DIA). NAT fallback feature allows traffic to use an alternative path if the primary NAT path fails. This ensures continuous connectivity even if there are issues with the primary NAT configuration.

    To enable NAT fallback using Cisco SD-WAN Manager:

    From the Cisco SD-WAN Manager menu, navigate to Configuration > Policy.

    Select Policies

    To create or manage Data Policy, select Traffic Policy from the Custom Options drop-down menu at the top right of the page.

    Under Centralized Policy, Select Traffic Policy

    In the Centralized Policy > Data Policy wizard, click Traffic Data and on DIA policy click the three dots (...), and click Edit to modify.

     

     

    Edit Traffic Data

    Click the Pencil icon to edit the sequence.

    Edit Sequence Type

    Enable Fallback under Actions and click Save Match and Action.

    Fallback - Save Match and Actions

     

     Click Save Data Policy.

    Save Data Policy

     

    Click Activate to apply the policy on vSmart Controllers.

    Activate Data Policy

     

    Click Next.

    Select Next to Continue

    Click devices, and make sure the config is correct. Click Config Diff and Side by Side Diff. Click Configure Devices.

    View Config Diff

    Configure Devices - NAT Fallback

     

    vManage successfully pushed the policy to vSmart Controllers.

    Validation Success

     

    Verify

    You can check the configuration on the device after you attach a template to it using the commands show running-config interface GigabitEthernet1 and show sdwan running-config | sec endpoint.

    show running-config interface GigabitEthernet1
    interface GigabitEthernet1
    ip address 10.2.7.2 255.255.255.0
    no ip redirects
    ip nat outside
    load-interval 30
    negotiation auto
    endpoint-tracker tracker1
    arp timeout 1200
    end
    Site400-cE1#show sdwan running-config | sec endpoint
    endpoint-tracker tracker1
    tracker-type interface
    endpoint-dns-name www.cisco.com
    threshold 100
    interval 30

    The output shows how to verify the tracker status using the commands show endpoint-tracker and show endpoint-tracker GigabitEthernet1.

    Site400-cE1#show endpoint-tracker
    Interface         Record Name   Status   Address Family   RTT in msecs   Probe ID  Next Hop
    GigabitEthernet1    tracker1     Up      IPv4              8               6       10.2.7.1

    Site400-cE1#show endpoint-tracker interface GigabitEthernet1
    Interface          Record Name    Status    Address Family   RTT in msecs   Probe ID  Next Hop
    GigabitEthernet1    tracker1       Up        IPv4                 8          6        10.2.7.1

    The output shows timer-related information about the tracker to help debug tracker-related issues, if any:

    Site400-cE1#show endpoint-tracker records
    Record Name    Endpoint        EndPoint Type    Threshold(ms)  Multiplier   Interval(s)  Tracker-Type
    tracker1       www.cisco.com    DNS_NAME           100            3            30         interface

     The output ofshow ip sla summarycommand.

    Site400-cE1#show ip sla summary
    IPSLAs Latest Operation Summary
    Codes: * active, ^ inactive, ~ pending
    All Stats are in milliseconds. Stats with u are in microseconds

    ID  Type  Destination    Stats  Return   Last
                                    Code     Run
    -----------------------------------------------------------------------
    *5  dns    8.8.8.8       RTT=16  OK    16 seconds ago
    *6  http   x.x.x.x       RTT=15  OK    3 seconds ago

    Verify the fallback configuration applied on the device using the command show sdwan policy from-vsmart.

    Site400-cE1#show sdwan policy from-vsmart
    from-vsmart data-policy _VPN12_VPN12_DIA
    direction from-service
    vpn-list VPN12
    sequence 1
    match
    source-data-prefix-list Site400_AllVPN_Prefixes
    action accept
    nat use-vpn 0
    nat fallback
    no nat bypass
    default-action drop

    Troubleshooting Tracker 

    Enable these debugs on the edge device to check how the router sends probes to determine the status of the transport interface.

    • To monitor how the router sends probes and determines the status of the transport interfaces use the debug platform software sdwan tracker command which is supported until the 17.12.x release.
    • From 17.13.x onwards, to monitor the probes logs, enable these debugs.
      • set platform software trace ios R0 sdwanrp-tracker debug
      • set platform software trace ios R0 sdwanrp-cfg debug
    • To check the logs related to IP SLA operations error and trace, enable these debugs. These logs show if IP SLA operations are failing.
      • debug ip sla trace
      • debug ip sla error 

    Run these show and monitor commands to check the debug logs:

    • show logging profile sdwan internal
    • monitor logging profile sdwan internal 
    Site400-cE1#show logging profile sdwan internal
    Logging display requested on 2024/08/13 08:10:45 (PDT) for Hostname: [Site400-cE1], Model: [C8000V], Version: [17.14.01a], SN: [9BX514OJB4H], MD_SN: [SSI130300YK]

    Displaying logs from the last 0 days, 0 hours, 10 minutes, 0 seconds
    executing cmd on chassis local ...
    Unified Decoder Library Init .. DONE
    Found 1 UTF Streams

    2024/08/13 08:02:28.408998337 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-INFRA_TRACE:OPER:10 slaSchedulerEventWakeup
    2024/08/13 08:02:28.409061529 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-INFRA_TRACE:OPER:10 Starting an operation
    2024/08/13 08:02:28.409086404 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-INFRA_TRACE: Sla sync operation start: pid:481
    2024/08/13 08:02:28.409160541 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-INFRA_TRACE: Sla sync handler: pid: 481
    2024/08/13 08:02:28.409182208 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE:OPER:10 Starting dns operation
    2024/08/13 08:02:28.409197024 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE:OPER:10 Query name - www.cisco.com
    2024/08/13 08:02:28.409215496 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE:OPER:10 DNS: IP Address update based on Source interface: GigabitEthernet1
    2024/08/13 08:02:28.409242243 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE:OPER:10 Source IP (from idb): 10.2.7.2
    2024/08/13 08:02:28.409274690 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE:OPER:10 Destination address: 8.8.8.8
    2024/08/13 08:02:28.409298157 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE:OPER:10 Source address: 10.2.7.2
    2024/08/13 08:02:28.409377223 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE:OPER:10 Nexthop address: 10.2.7.1
    2024/08/13 08:02:28.409391034 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE:OPER:10 Real address: 8.8.8.8
    2024/08/13 08:02:28.409434969 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE:OPER:10 actual target queried = www.cisco.com
    2024/08/13 08:02:28.409525831 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE:OPER:10 Pre-routed DNS query = www.cisco.com
    2024/08/13 08:02:28.426966448 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE:OPER:10 Query return code - no error
    2024/08/13 08:02:28.427004143 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE:OPER:10 Received IP address: x.x.x.x
    2024/08/13 08:02:28.427029754 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE:OPER:10 RTT=18
    2024/08/13 08:02:28.427161550 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-INFRA_TRACE:OPER:10 Scheduler update
    2024/08/13 08:02:28.427177727 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-INFRA_TRACE:OPER:10 Scheduler update: Updating result
    2024/08/13 08:02:28.427188035 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-INFRA_TRACE:OPER:10 Scheduler update: Updating link
    2024/08/13 08:02:28.427199147 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-INFRA_TRACE:OPER:10 Scheduler update: Updating link
    2024/08/13 08:02:28.427208941 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE:OPER:10 IPSLA Api stats update
    2024/08/13 08:02:28.427219960 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE: Common Stats Update: stats minResponseTime 17
    2024/08/13 08:02:28.427238042 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE: Common Stats Update: stats:minResponseTime: 4294967295 result:rttmin: 0, retCode: 1, stats:okCount: 1
    2024/08/13 08:02:28.427301952 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE: Common Stats Update: stats:minResponseTime: 4294967295 result:rttmin: 0, result:retCode: 1
    2024/08/13 08:02:28.427316275 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE: Common Stats Get: slaTagApiStatsLatest - latest retCode: 1
    2024/08/13 08:02:28.427326235 {iosrp_R0-0}{255}: [sdwanrp-tracker] [17432]: (debug): Received IPSLA status for DNS probe, probe_id - [10] SLA latest retcode 1 ( OK )
    2024/08/13 08:02:28.427328425 {iosrp_R0-0}{255}: [sdwanrp-tracker] [17432]: (debug): DNS status callback for probe_id - [10]
    2024/08/13 08:02:28.427341452 {iosrp_R0-0}{255}: [sdwanrp-tracker] [17432]: (debug): DNS query valid TRUE
    2024/08/13 08:02:28.427343152 {iosrp_R0-0}{255}: [sdwanrp-tracker] [17432]: (debug): DNS resolved address x.x.x.x
    2024/08/13 08:02:28.427344332 {iosrp_R0-0}{255}: [sdwanrp-tracker] [17432]: (debug): DNS probe handler probe id 10
    2024/08/13 08:02:28.427349194 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-INFRA_TRACE:OPER:10 Scheduler update: Updating link
    2024/08/13 08:02:28.427359268 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE: Common Stats Update: stats minResponseTime 17
    2024/08/13 08:02:28.427370416 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE: Common Stats Update: stats:minResponseTime: 4294967295 result:rttmin: 0, retCode: 1, stats:okCount: 1
    2024/08/13 08:02:28.427555382 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE: Common Stats Update: stats:minResponseTime: 4294967295 result:rttmin: 0, result:retCode: 1
    2024/08/13 08:02:28.427565670 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-INFRA_TRACE:OPER:10 Scheduler update: Updating link
    2024/08/13 08:02:28.427577691 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE: Common Stats Update: stats:minResponseTime: 13 result:rttmin: 0, retCode: 1, stats:okCount: 56
    2024/08/13 08:02:28.427588947 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE: Common Stats Update: stats:minResponseTime: 13 result:rttmin: 0, result:retCode: 1
    2024/08/13 08:02:28.427600567 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE: Common Stats Update: stats:minResponseTime: 13 result:rttmin: 0, retCode: 1, stats:okCount: 56
    2024/08/13 08:02:28.427611465 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE: Common Stats Update: stats:minResponseTime: 13 result:rttmin: 0, result:retCode: 1
    2024/08/13 08:02:28.427620724 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-INFRA_TRACE:OPER:10 Scheduler update: Updating link
    2024/08/13 08:02:28.427645035 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-INFRA_TRACE:OPER:10 Scheduler update: set Wakeup timer: 59981 (ms) op=176, max= 0
    2024/08/13 08:02:55.599896668 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-INFRA_TRACE:OPER:3 slaSchedulerEventWakeup
    2024/08/13 08:02:55.599966240 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-INFRA_TRACE:OPER:3 Starting an operation
    2024/08/13 08:02:55.599981173 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE:OPER:3 Starting http operation
    2024/08/13 08:02:55.600045761 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE:OPER:3 Nexthop address: 10.2.7.1
    2024/08/13 08:02:55.600111585 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE:OPER:3 DNS ok:Socket setup & register XDM, http=0x80007B15E3C48358
    2024/08/13 08:02:55.600330868 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE:OPER:3 slaSocketConnect return =11
    2024/08/13 08:02:55.610693565 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE:OPER:3 Socket receive length -1
    2024/08/13 08:02:55.610717011 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE:OPER:3 Wait connection Event:Socket setup & register XDM, http=0x80007B15E3C48358
    2024/08/13 08:02:55.610777327 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE:OPER:3 Sent 39 of 39 bytes
    2024/08/13 08:02:55.610788233 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE:OPER:3 Wait connection - connected
    2024/08/13 08:02:55.618534651 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE:OPER:3 Socket Recv:Time to first byte: 18 ms
    2024/08/13 08:02:55.618685838 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE:OPER:3 HTTP RTT=18
    2024/08/13 08:02:55.618697389 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-INFRA_TRACE:OPER:3 Scheduler update
    2024/08/13 08:02:55.618706090 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-INFRA_TRACE:OPER:3 Scheduler update: Updating result
    2024/08/13 08:02:55.618714316 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-INFRA_TRACE:OPER:3 Scheduler update: Updating link
    2024/08/13 08:02:55.618723915 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-INFRA_TRACE:OPER:3 Scheduler update: Updating link
    2024/08/13 08:02:55.618732815 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE:OPER:3 IPSLA Api stats update
    2024/08/13 08:02:55.618821650 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE: Common Stats Update: stats minResponseTime 19
    2024/08/13 08:02:55.618833396 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE: Common Stats Update: stats:minResponseTime: 4294967295 result:rttmin: 0, retCode: 1, stats:okCount: 1
    2024/08/13 08:02:55.618857012 {iosrp_R0-0}{255}: [buginf] [17432]: (debug): IPSLA-OPER_TRACE: Common Stats Update: stats:minResponseTime: 4294967295 result:rttmin: 0, result:retCode: 1

    Related Information

    Implement Direct Internet Access (DIA) for SD-WAN

    Cisco Catalyst SD-WAN NAT Configuration Guide

    NAT Fallback on Cisco IOS XE Catalyst SD-WAN Devices

    Technical Support & Documentation - Cisco Systems

    Revision History

    Revision Publish Date Comments
    2.0
    17-Nov-2025
    Added Alt Text. Updated Branding Requirements, Link Targets, Grammar, and Formatting.
    1.0
    15-Aug-2024
    Initial Release
    TAC Authored

    Contributed by Cisco Engineers

    • Karthik Reddy Yasa
      Technical Consulting Engineer

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