6/27/2023 0 Comments Cisco ise overviewIf the request does not contain a CALLING-STATION-ID, NAS-IP-ADDRESS is used for persistence.ĭHCP packets are parsed and the host populated client-identifier is noted, if any. If a CALLING-STATION-ID is populated in the RADIUS request, then that is used for persistence. For all other client types (wired/virtual), the aging time is 28800. If NAS-PORT-TYPE is 19 (wireless clients), then the aging time for the entries is set to 3600. RADIUS requests are parsed, and NAS-IP-ADDRESS, CALLING-STATION-ID and NAS-PORT-TYPE attributes are noted. The DataScript details are provided in RADIUS-DHCP-HTTPS. Refer to the DataScript function descriptions in Layer 4 DataScripts. The DataScript can be modified as per the user’s requirements. The functionality of the DataScript is explained using a sample DataScript. Configure NAT for CoA and attach to required Service Engine group.Ĭonfiguring DataScript to Parse RADIUS/DHCP Traffic.Attach DataScript to the virtual service.Configure the virtual service and pool.The SE IP needs to be configured as NAD on the ISE with the same credentials on the ISE and Avi Vantage. Configure the health monitor for RADIUS.Configure DataScript to parse RADIUS and DHCP packets and persistence using required fields.Configurationįollow the below mentioned steps to configure Avi Vantage for RADIUS load balancing: The NAT policy has been configured on Avi Vantage to NAT the source IP of the server to the VIP, if the destination port of the packet is UDP 1700. The NAD expects the source IP to be that of the configured RADIUS server in this case, it is the Avi VIP. The destination port, UDP 1700 (by default).The source IP of the individual PSN originating the CoA.The Cisco-ISE will send a Change of Authorization (CoA) request with the following details: Any subsequent RADIUS authentication traffic or DHCP profile traffic from the same client will be sent to the same server using the persistence entry.Ĭhange of Authorization Source NAT Support ![]() A persistence entry is created using DataScripts which parses the RADIUS requests and creates an entry based on the configured RADIUS attributes. Once Avi receives the RADIUS authentication traffic from the users, it is load balanced to one of the ISE PSNs using configured load balancing algorithms. ![]() ScenarioĪn Avi VIP is configured as a RADIUS server on the network access device (NAD). All traffic to ISE PSNs flow via Avi load balancers (Service Engines), as well as return traffic from ISE PSNs to users. An active/standby SE group with IP routing enabled is required to support the preservation of client IP for the RADIUS virtual service.Īs shown in the topology, Avi Vantage is logically inline between the user’s network and the ISE Policy Service nodes (PSN).Knowledge of Cisco ISE and its configuration is required before configuring Avi Vantage to load balance RADIUS traffic to Cisco ISE.Avi Vantage uses L4 DataScripts to achieve persistence using various RADIUS attributes and load balance DHCP profiling traffic to the same server as RADIUS. ![]() This guide explains the steps to configure Avi Vantage to load balance RADIUS traffic to Cisco Identity Services Engine (ISE). Load Balancing RADIUS with Cisco ISE Overview
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