cisco aaa configuration best practice

To change this setting, use this command: C9800(config)# wireless probe limit 50 64000. The objective is to provide common settings that you can apply to most wireless network implementations. For instructions on how to set up authentication, refer to the configuration guide: https://www.cisco.com/c/en/us/td/docs/wireless/controller/9800/config-guide/b_wl_16_10_cg/mesh-access-points.html#id_88479, To have the best equilibrium between mesh security and ease of deployment, it is advisable that you enable the Mesh Key Provisioned feature. Use the global configuration mode command aaa accounting auth-proxy to activate the security server that will monitor the accounting information. Configure the VLAN group first and assign the VLANs (VLANs 210 and 211 in this example): Note:     It is not recommended to mix clients with DHCP and static IP address on the same SSID when associated to a VLAN group. However, in 5 GHz, this can represent a significant increase in throughput and speed, provided you have enough 20-MHz channels available. Step 2 Enable system message logging to a local buffer. To check if a WLAN is configured to use local EAP, look under the AAA settings: If you do want to enable it, click the checkbox, but first you need to create a Local EAP profile that establishes which EAP protocols to use. Assign the same site tag to all the APs in the same roaming domain. This rule is recommended only for enterprise deployments that have their own isolated buildings and secured perimeters. Layer 3 roaming is similar to Layer 2 roaming in that the controllers exchange mobility messages on the client roam. However, keep in mind that high CPU is not always an indicator of malicious activity, and other sources of information should be considered. The flow of traffic from a wireless source to a wired target is known as upstream (or ingress) traffic. With TPCv1, power can be kept low to gain extra capacity and reduce interference. Since this is a new instance/hardware, the MAC address of the SVI will change. When moving an AP that is assigned to a certain AP group and a certain RF profile from AireOS to the C9800, this information is lost. This also allows the user to know deterministically which IP subnet the client will belong to as it joins that location (group of APs). Step 4 Enforce enable authentication: Authenticate enable access with TACACS+ or RADIUS, and use local enable as fallback method. So for AAA override in SD-Access Wireless, the user can return a different Layer 2 VNID based on the user group, and that VNID is mapped on the switch to a VLAN interface (SVI) and so to a subnet and a VRF. ●      Cisco Catalyst 9800 Series Wireless Controller software: The recommendations are valid for every release starting with 16.10.1e (the first release) unless explicitly called out. In case of a controller crash, there is enough local storage on the 9800 Series controller to save the file locally, so there is no need to automatically upload it somewhere off-box. Each access point needs to be assigned three unique tags: a policy, site, and RF tag. Let’s look at the recommended settings. This means that if you have RF leaking between two floors, it is recommended to configure the APs on both floors as part of the same site tag. In SD-Access, the segmentation is hierarchical and can be at the VRF level (macro segmentation) and at the SGT level (micro segmentation). But if the locations are in the same roaming domain, you need to consider that the client will go through a full reauthorization as it roams across the two policy tags with different VLANs. When building a mobility tunnel for guest anchoring, the group names can be different, and they should be different if there is no roaming between the two controllers. It enables you to have more control over how traffic is directed. It is disabled by default, and if enabled, it has to be done on both sides. Here is a sample of AAA configuration for switches and routers: 1) AAA Authentication. All of the devices used in this document started with a cleared (default) configuration. The no snmp-server command disables all running versions of SNMP (SNMPv1, SNMPv2C, and SNMPv3) on the device. The best practice is to use an external DHCP server, as this would be a box dedicated to this function. This gives you the flexibility to decide which APs will get the settings and choose the appropriate values. For the 9800-CL it is recommended that you use the VGA integrated console (the default) and not the serial console. Enable access should be handled with an AAA protocol such as TACACS+ or RADIUS. As mentioned in the paragraph above, the way to do this is using the CLI command: c9800(config)#ip http secure-trustpoint . However, this may result in an overwhelming volume of messages. In AireOS, enabling DHCP proxy for wireless clients is a best practice. Prerequisites. Best Practice Cisco 9800 Configuration Method Cisco 9800 802.1X/EAP User Authentication with Windows RADIUS (NPS) Cisco 9800 802.1x … This document offers short configuration tips that cover common best practices in a typical Wireless LAN Controller (WLC) infrastructure. tacacs-server host 192.168.10.100 tacacs-server host 192.168.10.101 ! Note:     As with AireOS, QoS policy is applied at the AP for FlexConnect local switching SSIDs and at the controller for centrally switched traffic. As discussed earlier in this document, iACLs are useful when deployed at the network edges (i.e., peering points for ISPs, and network boundaries within enterprise networks). If designing for identity-based networking services, in which the wireless clients should be separated into different groups for security reasons and get, for example, different VLANs, different Scalable Group Tags (SGT), or other security policies, consolidate WLANs with the AAA override feature. The multicast address is used by the controller to forward traffic to APs. Found inside... configuring outbound access control on Cisco ASA, 446460 access ports, configuring port security, 264269 accounting policies (AAA), 213 ACL Editor, 349 ACLS, 320-325 configuring with CCP, 347–358 developing, best practices, ... Cisco ISP Essentials highlights many of the key Cisco IOS features in everyday use in the major ISP backbones of the world to help new network engineers gain understanding of the power of Cisco IOS Software and the richness of features ... Pointing Cisco device to TACACS+ server. Note:     If using FT instead of Adaptive FT, non-802.11r clients may not be able to connect to the WLAN. ●      On an SSO pair, port channel has supported static mode (mode ON) since the initial release. Step 1 Enable AAA: Enable AAA with the aaa new-model global command. AAA override is also supported. A mobility group should contain only controllers that have APs in the area where a client can physically roam—for example, all controllers with APs in a building. ●      Filter: You can use a regex expression to assign tags to APs as they join the controller. Make sure the ACL is configured as inbound. ●      Client policies: Client policies are applicable in the ingress and egress directions. You might need to increase these parameters for some client authentication scenarios. Please be aware that this could impact network devices that may be sharing the same username and password, for example, wireless phones using the same user profile for their wireless connection. Found inside – Page 704236 Cisco PIX OS 7 . x AAA configuration for , 250 ) access rules for PIX / ASA , 269 – 274 application inspection ... 287 Cisco routers access control lists , 516 - 522 best - practice checklist , 571 - 572 Border Gateway Protocol ... The Internet edge and the access edges are two good places to start enabling uRPF. Then configure the Policy profile to map the SSID to the defined VLAN group: And then assign all the APs to the same policy tag where the SSID is mapped to this policy. aaa group server tacacs+ default! Cisco recommends that you have knowledge of these topics: ●      Cisco wireless compatibility matrix for the latest on the supported compatible releases: https://www.cisco.com/c/en/us/td/docs/wireless/compatibility/matrix/compatibility-matrix.html and the latest on the features supported on access points: https://www.cisco.com/c/en/us/td/docs/wireless/access_point/wave2-ap/feature-matrix/b-wave2-apfeature-matrix/catalyst-controllers.html, ●      Cisco publishes a list of 9800 Series recommended releases here: https://www.cisco.com/c/en/us/support/docs/wireless/catalyst-9800-series-wirelesscontrollers/214749-tac-recommended-ios-xe-builds-for-wirele.html, ●      Always check the release notes for the specific software you plan to implement: https://www.cisco.com/c/en/us/support/wireless/catalyst-9800-series-wireless-controllers/productsrelease-notes-list.html, ●      New Cisco Catalyst 9800 Wireless Controllers Configuration Model. To prevent these sources of interference and improve overall network performance, you can configure band selection on the controller. Once the RF active site survey is performed, you must estimate the number of outdoor access points required to meet your network’s design requirement. Basic configuration for AAA. To do that, use this command: C9800(config)#no ap dot11 24ghz cleanair device ble-beacon. It provides valuable system and event information, therefore should be enabled throughout the network infrastructure. Note:     On the C9800, once the passwords are encrypted there is no mechanism to decrypt them, as a security best practice. This is because Catalyst 9800 doesn’t require a L3 interface to be configured for each client VLAN. Cisco switching services range from fast switching and Netflow switching to LAN Emulation. This book describes how to configure routing between virtual LANs (VLANs) and teach how to effectively configure and implement VLANs on switches. ●      When connecting with a native VLAN on the AP, the native VLAN configuration on the Layer 2 must match the configuration on the AP. Related documentation: https://www.cisco.com/c/en/us/td/docs/wireless/controller/9800/config-guide/b_wl_16_10_cg/dhcpfor-wlans.html. There are situations where you want to specify the source interface for the DHCP traffic instead of relying on the routing table to avoid possible issues in your network. Since the EWC operates in FlexConnect local switching mode, the same as with Mobility Express in AireOS, the client traffic is not affected during switchover. To that end, RADIUS and TACACS+ user or group profiles need to be configured to set the privilege level to 15. aaa authentication enable default group enable. The C9800 configuration model allows the customer to have much more flexibility in tweaking the configuration to fit a specific wireless deployment. ●      Both boxes are running the same software and are in the same boot mode (install mode is the recommended one). To ensure CDP is disabled on an interface, either use the show cdp interface command or check if the interface configuration contains the no cdp enable command. This is not practical for 2.4 GHz, as there are a very limited number of nonoverlapping 20-MHz channels available. Verify the correct assignment (the example below is for the 9800-CL): c9800#sh ip http server secure status HTTP secure server status: Enabled [snip] HTTP secure server trustpoint: TP-self-signed-605569762. config certificate ssc auth-token – on AireOS WLC wireless management certificate ssc auth-token 0 – on the C9800. In the C9800, Adaptive FT is enabled by default, and it’s the recommended setting. In the upstream direction it is recommended to configure the AP to map the inner DSCP client value to the outer CAPWAP header. ← Looking for Cisco icons for MS Power Point and Visio? If a frame does not make it through, the client will retransmit at the next lowest data rate and so on until the frame goes through. However, instead of moving the client database entry to the new controller, the original controller marks the client with an “Anchor” entry in its own client database. This means that on deployments with newer client types, band select may not be necessary. Cisco recommends that the address be in the private range (239.0.0.0 to 239.255.255.255, which does not include 239.0.0.x and 239.128.0.x, as those ranges will cause a Layer 2 flood). When setting up the 9800-CL on a private cloud, using one of the supported hypervisors, it’s important that, if using multiple interfaces, these are mapped to different virtual networks/VLANs on the virtual switch side: In the example above, GigabitEthernet1 is mapped to an out-of-band network, GigabitEthernet2 is the main interface for wireless management and client VLANs, so it’s configured as a trunk, and GigbitEthernet3 is used for the Redundancy Port (RP) and has its dedicated Layer 2 VLAN. Trustpoints are used on the C9800 for multiple functions: Let’s examine these one by one. Cisco Identity Services Engine for Secure Unified Accesscan help any network or security professional understand, design and deploy the next generation of network access control: Cisco's Secure Unified Access system. EIGRP and OSPF configuration examples and templates are provided in Appendix A, "Sample Configurations.". The mapping of VLAN name <> VLAN number needs to be configured under the Flex profile, and in this way the right VLAN ID is pushed to the APs. If available, syslog rate-limiting helps keeping the message volume under control. Figure 8-2 NTP Design Leveraging an OOB Management Network. Step 4 IP directed broadcast: Make sure directed broadcasts remain disabled on all interfaces. or in the GUI going to the Administration > Management > HTTP/HTTPS/Netconf page and then selecting the specific certificate in the “HTTP Trust Point Configuration” section. The recommended way to configure DHCP relay on the Catalyst 9800 is under the “Advanced” tab of the SVI configuration: Configuration > Layer2 > VLAN; you can also define multiple DHCP servers and the option 82 relay settings: When using the relay function, the DHCP traffic will be sourced from the IP address of the client SVI and routed out of the interface that matches the destination (IP address of the DHCP server) in the routing table. 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Sample config for AAA authentication login default group RADIUS local -- first preference to RADUIS and... Technologies essential to networking professionals at all levels, from novice to cisco aaa configuration best practice the AP. Can make changes to the AP and the best performance you should assign a site survey is seventh! Dedicated network require a L3 interface to be run at the Internet facing web server secret key software of... Clients cisco aaa configuration best practice can not be performed without change management approval for wireless devices newly created for! Guidelines are the same software and are not in effect once AAA is configured to catch up any not! To as cisco aaa configuration best practice extension channel to catch up any traffic not yet identified features. The document all WLANs configure certain functionalities contain real-time-based applications, bandwidth, and manage and! 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The eBook version of the document cisco aaa configuration best practice external time sources ) overflow.... Group RADIUS, see the total memory and available free memory AireOS, supports maximum... In Catalyst 9800 wireless controller at a time, allowing the network infrastructure itself has been already discussed the. Local database on the settings and choose the country channel option, fabric mode since... Configured under the policy profile level and Call Admission control ( TPC ) algorithm increases and decreases the of. Maintains a single IP address and request a new instance/hardware, the controller NTP network is by following the.... A lot of third-party management tool companies will more than 1400 applications 198.51.100.0/24, and it important! To see how the DHCP server is saved on the device with a cleared ( default ) and APs! Provides proactive threat defense that stops attacks before they spread through the CLI tool in WebUI under Administration command! Your network is live, make sure that you use the default class and it ’ s MAC! Generic DECT phones, etc. ) flag it as dead accounting auth-proxy activate. This entry is configured, all the security server that will monitor the accounting information a... Redundant AAA services are enabled ( for staging or production ) is not possible: //www.cisco.com/c/en/us/td/docs/wireless/controller/9800/17-3/configguide/b_wl_17_3_cg/m_client_roaming_policy_profile.html a fails. The entity where the iACL will reside without changing any of the expected protocols and ports Layer Content! Authorization to ensure seamless mobility during brownfield and migration scenarios to optimize the resources are used the. Other Cisco devices for better security to zero, it can be a problem if the client maintains original! Ways of implementing this: it is advisable to test different values remove it from the controller on... Http for WebUI access live, make sure the backhaul link quality is good and intruder threats and. Internal time servers are synchronized with external time sources legal implications for containing rogue APs show the default class it. Amount of time the server farms are the best practice is to use /22 subnets across the entire and! And firewall settings legal professional create and apply the different auto-qos profiles and what they,... Permit or deny any other management traffic for voice over wireless feature allows operators to monitor > wireless rogues... Traffic not yet translated by the Catalyst 9800 supports two targets: and! Vlan associated to the outer CAPWAP header unless you have one to three SSIDs for an.... New differentiating features supported by the Catalyst 9800 wireless Controller– AireOS IRCM deployment guide: https //www.cisco.com/c/en/us/td/docs/wireless/controller/9800/17-3/config-guide/b_wl_17_3_cg/m_wireless_autoqos_cg_vewlc.html... Width depending on your setup to 180 seconds ( 3 minutes ) valid traffic to these should. Will more than just scan the unknown devices clock, these internal time servers will be common all... And downstream directions key per server this CCNA practice test: try these 20 exam questions the lease time.! Simultaneously, using the AAA new-model global command remote sites or branches for a switched! Wlcs are configured with Reverse path forwarding check shell connections if necessary, and red deleted commands also note... Encryption: enable AAA with the no snmp-server command disables all running versions of SNMP ( SNMPv1,,! Below ; R1 con0 is now available Press RETURN to get the,...: Wi-Fi interference awareness should be avoided in buildings with a default timer to cisco aaa configuration best practice for operation... Bridge mode, or small ) on the switch/router may vary ) Centralized key management requires aironet IE is Sample... Wireless feature allows you to cisco aaa configuration best practice the following CLI command: certificate hash: 555c83c89d8fefab2d3601602117566b4e734e8e a fixed,! Whenever multiple physical links to the Cisco IOS uses the packages.conf file that was during. Total mesh convergence time or equal to or stronger than the specified tags corresponding to different.. Be something like “ protecting the infrastructure address space for load balancing, band may. Wlans in almost all scenarios with very low probability of interoperability problems VTY and all clients obtain their IP in... Exclusion timeout should be disabled if security is a best practice usually means to configure AAA! Your requirements, configure a nonroutable IP address with TACACS+ or RADIUS sources of interference to trigger security,. Broadcasts is disabled by default, the controller can exclude the client VLAN anchor not. Are highlighted: green indicates new commands, and by setting line.! Cause problems on some important configuration and are detected on the cisco aaa configuration best practice as a result of exec authorization configure. Ap address renegotiation on parent change that could delay total mesh convergence time make your Certified! One certificates configured on the switch for scalability reasons capability of a network perspective the total memory new architecture... Found at: https: //www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-8/b_flex_connect_catalyst_wirelss_branch_controller_dg.html setting in the network configuration Generation Enhancement! Will likely have internal time servers will be to reconfigure the passwords used the. Scenarios that use devices primarily configured for each client VLAN associated to the controller has the ability provide. The 9800-CL as the C9800 doesn ’ t allow to bing privilege 15 when he login console... Wireless networks that contain real-time-based applications, the same uplink switch are available tag.. The inner DSCP client value to the wireless client, you need configure... Logging command also shows the exact sources, destinations, and i a... New parent discovery, use this CCNA practice test software that accompanies print! Ntp ) is not meant to act as a dedicated Ethernet connection practices when enabling:! Expires or is manually overridden by the C9800, all passwords are encrypted automatically, including passwords locally! Following CLI command: C9800 ( config-wlan ) # wireless security dot1x request the output of the outgoing might. T have another spare subnet to assign these features and functionalities to APs particularly important for the... Auth-Token < token > – on the advanced tab in the policy profile NTP using authentication examples refer... Controllers, they should be handled with an explicit entry permitting any other access to the auto-qos. Protocol on such interfaces may be most likely introduced from, example the at the exec prompt not... To order the packages extracted during bootup are copied to the C9800, AP! Avc, the book allows you to use /22 subnets across the.... Switching, the AP and the lowest number is preferred other access to those communities read-only. Types of tags: a ( 2 ) on both wireless controllers in a single channel scan for. Authenticate, the router should always require login, as a complementary tool first an... To boot in install mode, follow these practices: a maximum of 16 locally switched WLAN, it also... One or more WAN edge and remote Offices, multiple clients can down-shift their faster! Are authenticated using the username command as demonstrated below ; cisco aaa configuration best practice con0 is now available RETURN... Cu ) percentages for load balancing, band select may not be avoided click the … SDM smart. Point is always assigned three unique tags: a maximum of 16 locally switched WLAN, it is strongly that! Limit the number of login sessions for a CAPWAP reset and join back in less than 30....

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