# \#knowledge-base **URL:** https://community.cambiumnetworks.com/tag/knowledge-base/8.md [Latest](https://community.cambiumnetworks.com/latest.md) · [Categories](https://community.cambiumnetworks.com/categories.md) · [Tags](https://community.cambiumnetworks.com/tags.md) --- ## [Guidance for cnMaestro Enterprise Customers - (updated) 24 Sep 2026](https://community.cambiumnetworks.com/t/guidance-for-cnmaestro-enterprise-customers-updated-24-sep-2026/108849)
**Author:** [@KumarK](https://community.cambiumnetworks.com/u/KumarK)\ **Replies:** 244\ **Last updated:** [October 22, 2026, 10:02am UTC](https://community.cambiumnetworks.com/t/guidance-for-cnmaestro-enterprise-customers-updated-24-sep-2026/108849 "2026-10-22T10:02:28Z")
Guidance for cnMaestro Enterprise Customers Updated: 24-Sep-2026 Reference: https://www.cambiumnetworks.com/wp-content/uploads/Cambium-Networks-Company-Statement-Sep-23-2026-Update.pdf Summary As per the notice referen… --- ## [DHCP Snooping Parameters and Commands](https://community.cambiumnetworks.com/t/dhcp-snooping-parameters-and-commands/59175)
**Author:** [@sdespan](https://community.cambiumnetworks.com/u/sdespan)\ **Replies:** 1\ **Last updated:** [October 2, 2026, 7:45pm UTC](https://community.cambiumnetworks.com/t/dhcp-snooping-parameters-and-commands/59175 "2026-10-02T19:45:18Z")
Parameters and Commands DHCP Snooping .pdf (352 KB) --- ## [Device Onboarding and Linux DHCP Options for cnMaestro On Premises](https://community.cambiumnetworks.com/t/device-onboarding-and-linux-dhcp-options-for-cnmaestro-on-premises/45786)
**Author:** [@KR1](https://community.cambiumnetworks.com/u/KR1)\ **Replies:** 4\ **Last updated:** [October 2, 2026, 3:11am UTC](https://community.cambiumnetworks.com/t/device-onboarding-and-linux-dhcp-options-for-cnmaestro-on-premises/45786 "2026-10-02T03:11:39Z")
This document explains about the device on boarding to cnMeastro NOC server and configuring the DHCP server either Windows or Linux to send the DHCP options 15, 43 and 60 to the Cambium Devices. Minimum Required Softw… --- ## [How to generate and apply the ETSI Country code license on ePMP AP/PTP 550 Radios](https://community.cambiumnetworks.com/t/how-to-generate-and-apply-the-etsi-country-code-license-on-epmp-ap-ptp-550-radios/81173)
**Author:** [@Support\_Kumar](https://community.cambiumnetworks.com/u/Support_Kumar)\ **Replies:** 1\ **Last updated:** [September 21, 2026, 8:53am UTC](https://community.cambiumnetworks.com/t/how-to-generate-and-apply-the-etsi-country-code-license-on-epmp-ap-ptp-550-radios/81173 "2026-09-21T08:53:46Z")
Summary: This article will help us to generate and apply the ETSI license key to all ePMP AP/PTP 550 radios. You would see the below message on the radio: "Current device allowed to work in ETSI region only. To change … --- ## [\[New Feature - 5.12.1\] LACP (802.3ad) Pass-Through Over ePMP Wireless Bridges](https://community.cambiumnetworks.com/t/new-feature-5-12-1-lacp-802-3ad-pass-through-over-epmp-wireless-bridges/108807)
**Author:** [@aka](https://community.cambiumnetworks.com/u/aka)\ **Replies:** 6\ **Last updated:** [September 15, 2026, 7:53am UTC](https://community.cambiumnetworks.com/t/new-feature-5-12-1-lacp-802-3ad-pass-through-over-epmp-wireless-bridges/108807 "2026-09-15T07:53:05Z")
Applicable Versions: 5.12.1 Applicable Platforms: AX platform Link Aggregation (IEEE 802.1AX, formerly 802.3ad — commonly called LACP, LAG, “bonding,” or “port-channel”) lets two network devices combine several physica… --- ## [How to use DHCP Option 82 with ePMP](https://community.cambiumnetworks.com/t/how-to-use-dhcp-option-82-with-epmp/108739)
**Author:** [@Vladyslav\_Sapeha](https://community.cambiumnetworks.com/u/Vladyslav_Sapeha)\ **Replies:** 0\ **Last updated:** [August 18, 2026, 1:36pm UTC](https://community.cambiumnetworks.com/t/how-to-use-dhcp-option-82-with-epmp/108739 "2026-08-18T13:36:22Z")
Applicable Versions: 5.2.0 and above Applicable Platforms: N, AC, AX The main purpose of DHCP Option 82 (officially called the Relay Agent Information Option, defined in RFC 3046) is to inform the DHCP server about the… --- ## [Wireless Clients Seamless Roaming Best Practices](https://community.cambiumnetworks.com/t/wireless-clients-seamless-roaming-best-practices/96851)
**Author:** [@Sanjay\_Jadhav](https://community.cambiumnetworks.com/u/Sanjay_Jadhav)\ **Replies:** 9\ **Last updated:** [July 29, 2026, 2:31pm UTC](https://community.cambiumnetworks.com/t/wireless-clients-seamless-roaming-best-practices/96851 "2026-07-29T14:31:26Z")
Introduction This document explains Cambium Networks Access Points (APs) and external network recommended configuration to facilitate wireless clients’ seamless roaming across the APs. Additionally, network best practice… --- ## [How to Onboard devices to cnMaestro Cloud using API?](https://community.cambiumnetworks.com/t/how-to-onboard-devices-to-cnmaestro-cloud-using-api/83792)
**Author:** [@Support\_Kumar](https://community.cambiumnetworks.com/u/Support_Kumar)\ **Replies:** 3\ **Last updated:** [July 25, 2026, 3:18pm UTC](https://community.cambiumnetworks.com/t/how-to-onboard-devices-to-cnmaestro-cloud-using-api/83792 "2026-07-25T15:18:37Z")
Summary: cnMaestro supports a RESTful API as part of its Cloud deployment. This API allows customers to read data and perform operations programmatically using their own client applications. The API is supported over HT… --- ## [\[New Feature - 5.12.0\] ePMP 4xxx Series SM to AP Upgrade (8 SMs)](https://community.cambiumnetworks.com/t/new-feature-5-12-0-epmp-4xxx-series-sm-to-ap-upgrade-8-sms/108540)
**Author:** [@Fedor](https://community.cambiumnetworks.com/u/Fedor)\ **Replies:** 20\ **Last updated:** [July 9, 2026, 4:45pm UTC](https://community.cambiumnetworks.com/t/new-feature-5-12-0-epmp-4xxx-series-sm-to-ap-upgrade-8-sms/108540 "2026-07-09T16:45:34Z")
Applicable Versions: 5.12.0 Applicable Platforms: Force4616, Force4518, Force4600C, Force4625, Force400C, Force425, Force4525, Force4525L Starting with firmware 5.12.0 , the ePMP 4xxx Series SM-to-AP Upgrade feature is… --- ## [ePMP PoE Powering Primer](https://community.cambiumnetworks.com/t/epmp-poe-powering-primer/43903)
**Author:** [@Cambium\_Marty](https://community.cambiumnetworks.com/u/Cambium_Marty)\ **Replies:** 8\ **Last updated:** [July 15, 2026, 6:09pm UTC](https://community.cambiumnetworks.com/t/epmp-poe-powering-primer/43903 "2026-07-15T18:09:42Z")
This article is specific to powering ePMP modules with a Power over Ethernet (PoE) power injector. The ePMP power supply is an indoor unit that is connected to the ePMP module and network terminating equipment using Ca… --- ## [\[Scalability Improvement - 5.12.0\] Per-SM Throughput Maximization](https://community.cambiumnetworks.com/t/scalability-improvement-5-12-0-per-sm-throughput-maximization/108557)
**Author:** [@aka](https://community.cambiumnetworks.com/u/aka)\ **Replies:** 5\ **Last updated:** [July 1, 2026, 1:00am UTC](https://community.cambiumnetworks.com/t/scalability-improvement-5-12-0-per-sm-throughput-maximization/108557 "2026-07-01T01:00:37Z")
Applicable Versions: 5.12.0 and later Applicable Platforms: ePMP4XXX In previous ePMP AX software versions, PtMP sectors with many connected subscribers could experience reduced peak throughput for a single subscriber … --- ## [How to Upgrade cnMatrix Switch Firmware via the Device GUI](https://community.cambiumnetworks.com/t/how-to-upgrade-cnmatrix-switch-firmware-via-the-device-gui/108567)
**Author:** [@vku200](https://community.cambiumnetworks.com/u/vku200)\ **Replies:** 0\ **Last updated:** [June 30, 2026, 10:09am UTC](https://community.cambiumnetworks.com/t/how-to-upgrade-cnmatrix-switch-firmware-via-the-device-gui/108567 "2026-06-30T10:09:50Z")
Overview This guide explains how to upgrade the firmware (software image) on a Cambium Networks cnMatrix switch using the device’s built-in graphical user interface (GUI). The process applies to cnMatrix EX and TX series… --- ## [\[New Feature - 5.12.0\] Hairpin Acceleration Feature Rework](https://community.cambiumnetworks.com/t/new-feature-5-12-0-hairpin-acceleration-feature-rework/108556)
**Author:** [@Vladyslav\_Sapeha](https://community.cambiumnetworks.com/u/Vladyslav_Sapeha)\ **Replies:** 0\ **Last updated:** [June 26, 2026, 2:37pm UTC](https://community.cambiumnetworks.com/t/new-feature-5-12-0-hairpin-acceleration-feature-rework/108556 "2026-06-26T14:37:11Z")
Applicable Versions: 5.12.0 and later Affected Platforms: ePMP4XXX Starting from firmware version 5.12.0, the Hairpin Acceleration feature on AX platforms has been reworked. Hairpin functionality is used in scenarios … --- ## [Updated Terms of Service for cnMaestro](https://community.cambiumnetworks.com/t/updated-terms-of-service-for-cnmaestro/108551)
**Author:** [@Cambium\_Ajay](https://community.cambiumnetworks.com/u/Cambium_Ajay)\ **Replies:** 0\ **Last updated:** [June 25, 2026, 5:51am UTC](https://community.cambiumnetworks.com/t/updated-terms-of-service-for-cnmaestro/108551 "2026-06-25T05:51:27Z")
Cambium Networks is updating the cnMaestro Terms of Service. Key updates include clarified rights for customers to review and opt out before term changes take effect; new provisions governing Cambium’s use of artificial… --- ## [\[New Feature - 5.12.0\] ePMP 46XX Series AFC Enchantments](https://community.cambiumnetworks.com/t/new-feature-5-12-0-epmp-46xx-series-afc-enchantments/108543)
**Author:** [@Vladyslav\_Sapeha](https://community.cambiumnetworks.com/u/Vladyslav_Sapeha)\ **Replies:** 0\ **Last updated:** [June 23, 2026, 3:06pm UTC](https://community.cambiumnetworks.com/t/new-feature-5-12-0-epmp-46xx-series-afc-enchantments/108543 "2026-06-23T15:06:26Z")
Applicable Versions: 5.12.0 Applicable Platforms: ePMP46XX Firmware version 5.12.0 introduces the AFC Antenna Height Mode feature for ePMP46XX series. Automated Frequency Coordination (AFC) is a set of techniques used… --- ## [Action Required: Update Root CA Certificate for PTP 820/850 Software Image Downloads](https://community.cambiumnetworks.com/t/action-required-update-root-ca-certificate-for-ptp-820-850-software-image-downloads/108524)
**Author:** [@vaa100](https://community.cambiumnetworks.com/u/vaa100)\ **Replies:** 0\ **Last updated:** [June 17, 2026, 7:44pm UTC](https://community.cambiumnetworks.com/t/action-required-update-root-ca-certificate-for-ptp-820-850-software-image-downloads/108524 "2026-06-17T19:44:04Z")
Overview A root CA certificate used by cnMaestro On-Premises to validate PTP 820 and PTP 850 software image bundles downloaded from cnMaestro Cloud has expired. As a result, software image downloads may fail because the… --- ## [Configuring Cambium Access Points with Cisco ISE for RADIUS Authentication and CoA Using Standard Attributes](https://community.cambiumnetworks.com/t/configuring-cambium-access-points-with-cisco-ise-for-radius-authentication-and-coa-using-standard-attributes/108489)
**Author:** [@Akubathini\_Suresh](https://community.cambiumnetworks.com/u/Akubathini_Suresh)\ **Replies:** 0\ **Last updated:** [June 8, 2026, 5:40pm UTC](https://community.cambiumnetworks.com/t/configuring-cambium-access-points-with-cisco-ise-for-radius-authentication-and-coa-using-standard-attributes/108489 "2026-06-08T17:40:43Z")
Introduction This document provides a step-by-step guide for integrating Cisco Identity Services Engine (ISE) with Cambium Access Points to enable RADIUS-based authentication and Change of Authorization (CoA) using st… --- ## [cnMaestro On-Premises OVA and Package Upgrade Root CA Update](https://community.cambiumnetworks.com/t/cnmaestro-on-premises-ova-and-package-upgrade-root-ca-update/108486)
**Author:** [@vaa100](https://community.cambiumnetworks.com/u/vaa100)\ **Replies:** 0\ **Last updated:** [June 8, 2026, 1:12pm UTC](https://community.cambiumnetworks.com/t/cnmaestro-on-premises-ova-and-package-upgrade-root-ca-update/108486 "2026-06-08T13:12:26Z")
Action Needed: Update cnMaestro On-Premises Root CA Before Upgrade Overview A root CA certificate used for validating cnMaestro On-Premises OVA and package upgrades has expired. This may prevent upgrades from older cnMa… --- ## [Export Coverage to KMZ or Geotiff](https://community.cambiumnetworks.com/t/export-coverage-to-kmz-or-geotiff/108341)
**Author:** [@Seth\_Poche](https://community.cambiumnetworks.com/u/Seth_Poche)\ **Replies:** 0\ **Last updated:** [April 22, 2026, 6:23pm UTC](https://community.cambiumnetworks.com/t/export-coverage-to-kmz-or-geotiff/108341 "2026-04-22T18:23:56Z")
With Release 2.7.0, cnHeat now has the ability to export coverage to either KMZ or Geotiff. Under the Export menu option users will see KMZ/Geotiff. In Step 1, select the desired radios from the list in the top and … --- ## [Setting up in-app purchasing in cnHeat (US Only)](https://community.cambiumnetworks.com/t/setting-up-in-app-purchasing-in-cnheat-us-only/108339)
**Author:** [@Seth\_Poche](https://community.cambiumnetworks.com/u/Seth_Poche)\ **Replies:** 0\ **Last updated:** [April 22, 2026, 6:00pm UTC](https://community.cambiumnetworks.com/t/setting-up-in-app-purchasing-in-cnheat-us-only/108339 "2026-04-22T18:00:38Z")
With the release of cnHeat 2.7.0, users in the United States will now notice a gray “Setup In-App Purchases” button either on the Subscriptions menu screen or the “Choose a Credit” screen. By clicking this button … --- ## [WireGuard Two-Factor Authentication Configuration Guide](https://community.cambiumnetworks.com/t/wireguard-two-factor-authentication-configuration-guide/108182)
**Author:** [@vijay\_yadav](https://community.cambiumnetworks.com/u/vijay_yadav)\ **Replies:** 1\ **Last updated:** [April 22, 2026, 2:16pm UTC](https://community.cambiumnetworks.com/t/wireguard-two-factor-authentication-configuration-guide/108182 "2026-04-22T14:16:00Z")
1. Enable WireGuard on NSE Log in to the cnMaestro interface. Navigate to the NSE configuration, go to VPN Enable WireGuard on the device, set up the dhcp pool/ 2. Create a User for Authentication Go to th… --- ## [\[New Feature - 5.11.0\] Primary AP Reconnect - Smart Scanning Enhancements](https://community.cambiumnetworks.com/t/new-feature-5-11-0-primary-ap-reconnect-smart-scanning-enhancements/107839)
**Author:** [@Fedor](https://community.cambiumnetworks.com/u/Fedor)\ **Replies:** 1\ **Last updated:** [April 14, 2026, 4:05am UTC](https://community.cambiumnetworks.com/t/new-feature-5-11-0-primary-ap-reconnect-smart-scanning-enhancements/107839 "2026-04-14T04:05:30Z")
Applicable Versions: 5.11 Applicable Platforms: Force 4600C, ePMP4600L, Force 400, Force425, ePMP4500L The 5.11 release introduces enhancements to the Primary AP Reconnect feature. This improvement adds a smart Monitor… --- ## [PPPoE Encryption and Compression Control Parameters added in SW release 5.11.0](https://community.cambiumnetworks.com/t/pppoe-encryption-and-compression-control-parameters-added-in-sw-release-5-11-0/108250)
**Author:** [@aka](https://community.cambiumnetworks.com/u/aka)\ **Replies:** 0\ **Last updated:** [March 24, 2026, 6:08pm UTC](https://community.cambiumnetworks.com/t/pppoe-encryption-and-compression-control-parameters-added-in-sw-release-5-11-0/108250 "2026-03-24T18:08:38Z")
Applicable versions: 5.11.0 and above Applicable platforms: AC, AX ePMP AX and AC radios in Subscriber mode add control over two PPPoE-related parameters: Encryption and Compression. Both parameters can now be independ… --- ## [The ePMP F4616 FCC Subscriber Module has now been officially certified by the FCC and is available for procurement](https://community.cambiumnetworks.com/t/the-epmp-f4616-fcc-subscriber-module-has-now-been-officially-certified-by-the-fcc-and-is-available-for-procurement/108199)
**Author:** [@Fedor](https://community.cambiumnetworks.com/u/Fedor)\ **Replies:** 0\ **Last updated:** [March 13, 2026, 3:08pm UTC](https://community.cambiumnetworks.com/t/the-epmp-f4616-fcc-subscriber-module-has-now-been-officially-certified-by-the-fcc-and-is-available-for-procurement/108199 "2026-03-13T15:08:01Z")
This new model expands the ePMP 4600 portfolio and is designed to deliver strong performance, flexibility in deployment. Key capabilities include: • Built-in GPS receiver in the FCC version, with support for an exte… --- ## [VPN and Server Configuration for NSE 3000 VPN Solution](https://community.cambiumnetworks.com/t/vpn-and-server-configuration-for-nse-3000-vpn-solution/90549)
**Author:** [@RayS](https://community.cambiumnetworks.com/u/RayS)\ **Replies:** 7\ **Last updated:** [February 20, 2025, 8:00am UTC](https://community.cambiumnetworks.com/t/vpn-and-server-configuration-for-nse-3000-vpn-solution/90549 "2025-02-20T08:00:13Z")
Learn how to configure VPN server and client settings for the NSE 3000 with this easy step-by-step guide. Instructions include Windows, Linux, MacOS, iOS/iPadOS and Android environments. VPN Server Configuration from … --- ## [ePMP TDD Sync Sources White-paper](https://community.cambiumnetworks.com/t/epmp-tdd-sync-sources-white-paper/108153)
**Author:** [@aka](https://community.cambiumnetworks.com/u/aka)\ **Replies:** 0\ **Last updated:** [March 2, 2026, 12:13pm UTC](https://community.cambiumnetworks.com/t/epmp-tdd-sync-sources-white-paper/108153 "2026-03-02T12:13:50Z")
Cambium ePMP radios employ Time Division Duplex (TDD), dividing each frequency channel into discrete downlink and uplink slots. Without synchronization, each Access Point (AP) determines its transmit timing independently… --- ## [Using cnHeat to submit BDC Reporting via Locations method](https://community.cambiumnetworks.com/t/using-cnheat-to-submit-bdc-reporting-via-locations-method/87460)
**Author:** [@Seth\_Poche](https://community.cambiumnetworks.com/u/Seth_Poche)\ **Replies:** 2\ **Last updated:** [February 24, 2026, 11:48pm UTC](https://community.cambiumnetworks.com/t/using-cnheat-to-submit-bdc-reporting-via-locations-method/87460 "2026-02-24T23:48:36Z")
The BDC reporting provides for two methods for submitting Availability Data. a list of locations served by the provider,in a tabular format, where the locations are based on the FCC’s Broadband Serviceable Location F… --- ## [Preventing VPN Applications from Bypassing the Guest Splash Page(Thunder VPN)](https://community.cambiumnetworks.com/t/preventing-vpn-applications-from-bypassing-the-guest-splash-page-thunder-vpn/108128)
**Author:** [@Sharath\_Chandrasheka](https://community.cambiumnetworks.com/u/Sharath_Chandrasheka)\ **Replies:** 0\ **Last updated:** [February 17, 2026, 12:55pm UTC](https://community.cambiumnetworks.com/t/preventing-vpn-applications-from-bypassing-the-guest-splash-page-thunder-vpn/108128 "2026-02-17T12:55:25Z")
Issue: In certain deployments, users connecting to a Guest SSID while running VPN applications (for example, Thunder VPN) may experience one or more of the following issues: The client is not redirected to the captive… --- ## [4+0 setup with PTP820C using single antenna](https://community.cambiumnetworks.com/t/4-0-setup-with-ptp820c-using-single-antenna/49977)
**Author:** [@allenyu](https://community.cambiumnetworks.com/u/allenyu)\ **Replies:** 3\ **Last updated:** [February 15, 2026, 5:48am UTC](https://community.cambiumnetworks.com/t/4-0-setup-with-ptp820c-using-single-antenna/49977 "2026-02-15T05:48:56Z")
PTP820C is a dual core radio, which provide over 1Gbps full duplex throughput when both cores activated. Sometimes people need more capacity, a 4+0 setup with two of hte PTP820C on each end can support more than 2Gbbps … --- ## [\[New Feature - 5.11.0\] Station Selection – Smarter Traffic Scheduling for Better QoS](https://community.cambiumnetworks.com/t/new-feature-5-11-0-station-selection-smarter-traffic-scheduling-for-better-qos/108014)
**Author:** [@aka](https://community.cambiumnetworks.com/u/aka)\ **Replies:** 3\ **Last updated:** [February 4, 2026, 12:10pm UTC](https://community.cambiumnetworks.com/t/new-feature-5-11-0-station-selection-smarter-traffic-scheduling-for-better-qos/108014 "2026-02-04T12:10:37Z")
Applicable versions: 5.11.0 and above Applicable platforms: AX Station Selection The Station Selection feature improves performance by allowing the access point (AP) to prioritize which station (STA) is served first, b… [Next page](https://community.cambiumnetworks.com/tag/knowledge-base/8.md?match_all_tags=true&page=1&tags%5B%5D=knowledge-base)