--- title: "Reference" description: "APIs, CLI, architecture and design, and FAQ." product: "Calico Enterprise" version: "3.21" section: "Reference" canonical_url: "https://docs.tigera.io/calico-enterprise/3.21/reference/" --- # Reference APIs, CLI, architecture and design, and FAQ. ## API and installation references ##### [Tigera Client library](https://docs.tigera.io/calico-enterprise/3.21/reference/api.md) [Learn about the Tigera client library and how to use it.](https://docs.tigera.io/calico-enterprise/3.21/reference/api.md) ##### [Installation reference](https://docs.tigera.io/calico-enterprise/3.21/reference/installation/api.md) [Installation API reference](https://docs.tigera.io/calico-enterprise/3.21/reference/installation/api.md) ##### [Helm installation reference](https://docs.tigera.io/calico-enterprise/3.21/reference/installation/helm_customization.md) [Helm installation reference](https://docs.tigera.io/calico-enterprise/3.21/reference/installation/helm_customization.md) ##### [REST API Reference](https://docs.tigera.io/calico-enterprise/3.21/reference/rest-api-reference) [REST API reference](https://docs.tigera.io/calico-enterprise/3.21/reference/rest-api-reference) ##### [TigeraStatus](https://docs.tigera.io/calico-enterprise/3.21/reference/installation/tigerastatus.md) [Descriptions of Tigera Status fields](https://docs.tigera.io/calico-enterprise/3.21/reference/installation/tigerastatus.md) ## calicoctl reference ##### [calicoctl user reference](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/overview.md) [The command line interface tool (CLI) to manage Calico Enterprise network and security policy.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/overview.md) ##### [calicoctl apply](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/apply.md) [Command to apply a policy.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/apply.md) ##### [calicoctl captured-packets](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/captured-packets.md) [Command to access capture files generated by a PacketCapture.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/captured-packets.md) ##### [calicoctl cluster](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/cluster/overview.md) [Commands for calicoctl cluster.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/cluster/overview.md) ##### [calicoctl cluster diags](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/cluster/diags.md) [Command to get diagnostics from a Calico cluster.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/cluster/diags.md) ##### [calicoctl convert](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/convert.md) [Command to convert contents of policy.yaml to v3 policy.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/convert.md) ##### [calicoctl create](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/create.md) [Command to create a policy.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/create.md) ##### [calicoctl delete](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/delete.md) [Command to delete a policy.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/delete.md) ##### [calicoctl get](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/get.md) [Command to list policies in the default output format.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/get.md) ##### [calicoctl ipam](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/ipam/overview.md) [Commands for calicoctl IP address management (IPAM).](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/ipam/overview.md) ##### [calicoctl ipam check](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/ipam/check.md) [Command to check IPAM status](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/ipam/check.md) ##### [calicoctl ipam release](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/ipam/release.md) [Command to release an IP address from Calico Enterprise IP management.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/ipam/release.md) ##### [calicoctl ipam show](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/ipam/show.md) [Command to see if IP address is being used.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/ipam/show.md) ##### [calicoctl ipam configure](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/ipam/configure.md) [Command to change IPAM configuration.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/ipam/configure.md) ##### [calicoctl ipam split](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/ipam/split.md) [Command and options for splitting an existing IP pool](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/ipam/split.md) ##### [calicoctl datastore](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/datastore/overview.md) [Commands for calicoctl datastore](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/datastore/overview.md) ##### [calicoctl datastore migrate](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/datastore/migrate/overview.md) [Commands for calicoctl datastore migrate.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/datastore/migrate/overview.md) ##### [calicoctl datastore migrate lock](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/datastore/migrate/lock.md) [Command and options for locking a datastore for migration.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/datastore/migrate/lock.md) ##### [calicoctl datastore migrate unlock](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/datastore/migrate/unlock.md) [Command and options for unlocking a datastore after migration.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/datastore/migrate/unlock.md) ##### [calicoctl label](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/label.md) [Command to change labels for workload endpoints or nodes.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/label.md) ##### [calicoctl node](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/node/overview.md) [Commands for calicoctl node.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/node/overview.md) ##### [calicoctl node run](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/node/run.md) [Command and options for running a Calico node.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/node/run.md) ##### [calicoctl node status](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/node/status.md) [Command to check status of a Calico node instance.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/node/status.md) ##### [calicoctl node diags](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/node/diags.md) [Command to get diagnostics from a Calico node.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/node/diags.md) ##### [calicoctl node checksystem](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/node/checksystem.md) [Command to check compatibility of host to run a Calico node instance.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/node/checksystem.md) ##### [calicoctl patch](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/patch.md) [Command to update a node with a patch.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/patch.md) ##### [calicoctl replace](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/replace.md) [Command to replace an existing policy with a different one.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/replace.md) ##### [calicoctl version](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/version.md) [Command to display the calicoctl CLI version.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoctl/version.md) ## calicoq reference ##### [calicoq](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoq/overview.md) [CLI to verify that your security policies are configured as intended.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoq/overview.md) ##### [calicoq and selectors](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoq/selectors.md) [Use selectors to match criteria in endpoints, policies, or profiles .](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoq/selectors.md) ##### [calicoq endpoint](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoq/endpoint.md) [Command to list policies and profiles for selected endpoints.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoq/endpoint.md) ##### [calicoq eval](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoq/eval.md) [Command to list endpoints matched by a selector.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoq/eval.md) ##### [calicoq host](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoq/host.md) [Command to list endpoints, policies, and profiles on the selected host.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoq/host.md) ##### [calicoq policy](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoq/policy.md) [Command to list endpoints for a policy.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoq/policy.md) ##### [calicoq version](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoq/version.md) [Command to list version of the calicoq CLI.](https://docs.tigera.io/calico-enterprise/3.21/reference/clis/calicoq/version.md) ## Resource definitions ##### [Resource definitions](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/overview.md) [Calico Enterprise resources (APIs) that you can manage using calicoctl.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/overview.md) ##### [BFD configuration](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/bfdconfig.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/bfdconfig.md) ##### [BGP configuration](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/bgpconfig.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/bgpconfig.md) ##### [BGP peer](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/bgppeer.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/bgppeer.md) ##### [BGP Filter](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/bgpfilter.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/bgpfilter.md) ##### [Block affinity](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/blockaffinity.md) [IP address management block affinity](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/blockaffinity.md) ##### [Calico node status](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/caliconodestatus.md) [API for this Calico resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/caliconodestatus.md) ##### [Compliance reports (deprecated)](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/compliance-reports/overview.md) [Schedule reports and configure report scope.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/compliance-reports/overview.md) ##### [Inventory report](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/compliance-reports/inventory.md) [API for this resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/compliance-reports/inventory.md) ##### [Network Access report](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/compliance-reports/network-access.md) [API for this resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/compliance-reports/network-access.md) ##### [Policy audit report](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/compliance-reports/policy-audit.md) [API for this resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/compliance-reports/policy-audit.md) ##### [CIS benchmark report](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/compliance-reports/cis-benchmark.md) [API for this resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/compliance-reports/cis-benchmark.md) ##### [Deep packet inspection](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/deeppacketinspection.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/deeppacketinspection.md) ##### [Early Network Configuration](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/earlynetworkconfiguration.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/earlynetworkconfiguration.md) ##### [Egress gateway policy](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/egressgatewaypolicy.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/egressgatewaypolicy.md) ##### [External network](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/externalnetwork.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/externalnetwork.md) ##### [Felix configuration](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/felixconfig.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/felixconfig.md) ##### [Global Alert](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/globalalert.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/globalalert.md) ##### [Global network policy](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/globalnetworkpolicy.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/globalnetworkpolicy.md) ##### [Global network set](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/globalnetworkset.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/globalnetworkset.md) ##### [Global report](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/globalreport.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/globalreport.md) ##### [Global threat feed](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/globalthreatfeed.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/globalthreatfeed.md) ##### [Host endpoint](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/hostendpoint.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/hostendpoint.md) ##### [IP pool](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/ippool.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/ippool.md) ##### [IP reservation](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/ipreservation.md) [API for this Calico resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/ipreservation.md) ##### [IPAM configuration](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/ipamconfig.md) [IP address management global configuration](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/ipamconfig.md) ##### [License key](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/licensekey.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/licensekey.md) ##### [Kubernetes controllers configuration](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/kubecontrollersconfig.md) [API for KubeControllersConfiguration resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/kubecontrollersconfig.md) ##### [Managed Cluster](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/managedcluster.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/managedcluster.md) ##### [Network policy](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/networkpolicy.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/networkpolicy.md) ##### [Network set](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/networkset.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/networkset.md) ##### [Node](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/node.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/node.md) ##### [Packet capture](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/packetcapture.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/packetcapture.md) ##### [Policy recommendation scope](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/policyrecommendations.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/policyrecommendations.md) ##### [Profile](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/profile.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/profile.md) ##### [Remote cluster configuration](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/remoteclusterconfiguration.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/remoteclusterconfiguration.md) ##### [Security event webhook](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/securityeventwebhook.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/securityeventwebhook.md) ##### [Staged global network policy](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/stagedglobalnetworkpolicy.md) [API for this resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/stagedglobalnetworkpolicy.md) ##### [Staged Kubernetes network policy](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/stagedkubernetesnetworkpolicy.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/stagedkubernetesnetworkpolicy.md) ##### [Staged network policy](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/stagednetworkpolicy.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/stagednetworkpolicy.md) ##### [Tier](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/tier.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/tier.md) ##### [Workload endpoint](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/workloadendpoint.md) [API for this Calico Enterprise resource.](https://docs.tigera.io/calico-enterprise/3.21/reference/resources/workloadendpoint.md) ## Host endpoints ##### [Host endpoints](https://docs.tigera.io/calico-enterprise/3.21/reference/host-endpoints/overview.md) [Secure host network interfaces.](https://docs.tigera.io/calico-enterprise/3.21/reference/host-endpoints/overview.md) ##### [Creating policy for basic connectivity](https://docs.tigera.io/calico-enterprise/3.21/reference/host-endpoints/connectivity.md) [Customize the Calico failsafe policy to protect host endpoints.](https://docs.tigera.io/calico-enterprise/3.21/reference/host-endpoints/connectivity.md) ##### [Creating host endpoint objects](https://docs.tigera.io/calico-enterprise/3.21/reference/host-endpoints/objects.md) [To protect a host interface, start by creating a host endpoint object in etcd.](https://docs.tigera.io/calico-enterprise/3.21/reference/host-endpoints/objects.md) ##### [Selector-based policies](https://docs.tigera.io/calico-enterprise/3.21/reference/host-endpoints/selector.md) [Apply ordered policies to endpoints that match specific label selectors.](https://docs.tigera.io/calico-enterprise/3.21/reference/host-endpoints/selector.md) ##### [Failsafe rules](https://docs.tigera.io/calico-enterprise/3.21/reference/host-endpoints/failsafe.md) [Avoid cutting off connectivity to hosts because of incorrect network policies.](https://docs.tigera.io/calico-enterprise/3.21/reference/host-endpoints/failsafe.md) ##### [Pre-DNAT policy](https://docs.tigera.io/calico-enterprise/3.21/reference/host-endpoints/pre-dnat.md) [Apply rules in a host endpoint policy before any DNAT.](https://docs.tigera.io/calico-enterprise/3.21/reference/host-endpoints/pre-dnat.md) ##### [Apply on forwarded traffic](https://docs.tigera.io/calico-enterprise/3.21/reference/host-endpoints/forwarded.md) [Learn the subtleties using the applyOnForward option in host endpoint policies.](https://docs.tigera.io/calico-enterprise/3.21/reference/host-endpoints/forwarded.md) ##### [Summary of host endpoint policies](https://docs.tigera.io/calico-enterprise/3.21/reference/host-endpoints/summary.md) [How different host endpoint rules affect packet flows.](https://docs.tigera.io/calico-enterprise/3.21/reference/host-endpoints/summary.md) ##### [Connection tracking](https://docs.tigera.io/calico-enterprise/3.21/reference/host-endpoints/conntrack.md) [Workaround for Linux conntrack if Calico policy is not working as it should.](https://docs.tigera.io/calico-enterprise/3.21/reference/host-endpoints/conntrack.md) ## Architecture ##### [Component architecture](https://docs.tigera.io/calico-enterprise/3.21/reference/architecture/overview.md) [Understand the Calico Enterprise components and the basics of BGP networking.](https://docs.tigera.io/calico-enterprise/3.21/reference/architecture/overview.md) ##### ['The Calico Enterprise data path: IP routing and iptables'](https://docs.tigera.io/calico-enterprise/3.21/reference/architecture/data-path.md) [Learn how packets flow between workloads in a datacenter, or between a workload and the internet.](https://docs.tigera.io/calico-enterprise/3.21/reference/architecture/data-path.md) ## Other reference topics ##### [Attribution](https://docs.tigera.io/calico-enterprise/3.21/reference/attribution.md) [Third-party license attribution report for Calico Enterprise](https://docs.tigera.io/calico-enterprise/3.21/reference/attribution.md) ##### [Component versions](https://docs.tigera.io/calico-enterprise/3.21/reference/component-versions.md) [A list of component versions for Calico Enterprise](https://docs.tigera.io/calico-enterprise/3.21/reference/component-versions.md) ##### [Frequently asked questions](https://docs.tigera.io/calico-enterprise/3.21/reference/faq.md) [Common questions that users ask about Calico Enterprise.](https://docs.tigera.io/calico-enterprise/3.21/reference/faq.md) ##### [Platform support policy](https://docs.tigera.io/calico-enterprise/3.21/reference/support-policy.md) [Calico Enterprise platform support policy.](https://docs.tigera.io/calico-enterprise/3.21/reference/support-policy.md)