Netgear M4200-10MG-PoE+ (GSM4210P) - Multigigabit Managed Switch with 8*2.5G and 2x10G SFP+ Layer 3 User Manual

The System Information page displays.

Select Security > Management Security > RADIUS > Radius Configuration. 

The Current Server IP Address field is blank if no servers are configured (see 

on page 491). The switch supports up to three configured RADIUS 

servers. If more than one RADIUS servers is configured, the current server is the primary 
server. If no servers are configured as the primary server, the current server is the most 
recently added RADIUS server.

In the Source Interface list, select the interface to use for RADIUS. 

Possible values are as follows: 

None

Routing interface

Routing VLAN

Routing loopback interface

Service Port 

By default, VLAN 1 is used as source interface.

In the Max Number of Retransmits field, specify the maximum number of times a request 

packet is retransmitted to the RADIUS server. 

The valid range is 1– 15. The default value is 4.

Consider the maximum delay time when you configure the RADIUS maximum retransmit 
and RADIUS time-out. If multiple RADIUS servers are configured, the maximum 
retransmit value on each is exhausted before the next server is attempted. A retransmit 
does not occur until the configured time-out value on that server passed without a 
response from the RADIUS server. Therefore, the maximum delay in receiving a 
response from the RADIUS application equals the retransmit times the time-out for all 
configured servers. If the RADIUS request was generated by a user login attempt, all 
user interfaces are blocked until the RADIUS application returns a response.