Published On: August 6ᵗʰ, 2019 02:01
IP Device Tracking
The IP Device Tracking maintains a database of IP and MAC addresses that are used to get the source IP of dynamic ACL, and to maintain the binding of the IPs to the security group tags.
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
Information About IP Device Tracking
The IP Device Tracking feature uses Address Resolution Protocol (ARP) snooping and DHCP snooping to maintain a database of IP and MAC addresses. This data is also used to track switches that do not perform routing and do not have ARP tables.
IP Device Tracking is enabled if features such as Network Mobility Service Protocol (NMSP) or Device Sensor, which have dependency on IP Device Tracking, are enabled.
IP Device Tracking is controlled at an interface level. For example, if feature X, which is dependent on IP Device Tracking is enabled on port Y, then IP Device Tracking is also enabled on port Y. However, if you want to turn off IP Device Tracking on port Y, remove feature X, which automatically disables IP Device Tracking on port Y.
To disable IP Device Tracking, turn off the features that enable IP Device Tracking, and then use the following command at the interface level:
ip device tracking maximum 0
Do not configure the interface-level commands because they might have an impact on the features that are dependent on IP Device Tracking.
Recommended Best Practices
The following are the best practices in the context of working with Cisco Catalyst 3850 Series Switches:
Enter the non zero source IP addresses in ARP requests to eliminate duplicate IP addresses that are created due to IP Device Tracking.
Delay the ARP probes that are dependent on IP Device Tracking and are triggered by a link-up.
Disable IP Device Tracking on trunk ports.
Supported Platforms and Releases
|Supported Platforms||Feature Name||Disable Method||CLI to Disable|
|Cisco Catalyst 3850 Series Switches||IP Device Tracking||Per interface||ip device tracking maximum 0|
How to Disable IP Device Tracking
Disabling IP Device Tracking
Verifying IP Device Tracking
Configuration Examples for IP Device Tracking
Example: Verifying if IP Device Tracking is Disabled
The following is a sample output of the show ip device tracking command on Cisco Catalyst 3850 Series Switch:
Device# show ip device tracking interface GigibitEthernet 1/0/9 Interface GigabitEthernet1/0/9 is: STAND ALONE IP Device Tracking = Disabled IP Device Tracking Probe Count = 3 IP Device Tracking Probe Interval = 180000 IPv6 Device Tracking Client Registered Handle: 75 IP Device Tracking Enabled Features: HOST_TRACK_CLIENT_ATTACHMENT HOST_TRACK_CLIENT_SM
Example: Displaying Port-Asic Details
The following is a sample output of the show platform command on a Cisco Catalyst 3850 Series Switch:
Device# show platform port-asic ifm mappings port-le switch 1 Mappings Table Port-LE Interface IIF-ID Type 0x488ab810 Gi1/0/12 0x0101954000000023 PORT_LE 0x5470ce18 Gi1/0/1 0x010375c000000008 PORT_LE 0x547124c0 Gi1/0/2 0x0106ccc00000000a PORT_LE
After you associate a snooping value in port LE, if the value is 1, ARP snooping is enabled. Otherwise it is disabled. The following example shows if ARP snooping is enabled on a port:
show platform abstraction print-resource-handle 0x547124c0 1 sw 1 | I SNOOPING LEAD_PORT_ARP_OR_ND_SNOOPING_ENABLED_IPV4 value 0 Pass LEAD_PORT_ARP_OR_ND_SNOOPING_ENABLED_IPV6 value 0 Pass
Additional References for Disabling IP Device Tracking
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Feature Information for IP Device Tracking
The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
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