• server-ip-address – IPv4 or IPv6 address

• auth-port-value – Enter authentication port number, Range: 1 – 65535, Default: 1812

• pap – Password Authentication Protocol authentication type (default)

• chap – Challenge-Handshake Authentication Protocol authentication type

• plaintext-value – Plaintext passkey string. Valid characters: ASCII printable except SPACE, #, and COMMA. Maximum length: 65

• encrypted-passkey-value – Encrypted passkey (cipher text)

• priority-value – Enter the priority of RADIUS server, Range: 1 – 60, Default: 1

• retransmit-attempts-value – Enter the number of retransmit attempts, Range: 0 – 10, Default: 3

• eth-if-id – Ethernet interface identifier in multiples of 4

• po-if-id – PortChannel identifier, Range: 1 – 256

• lpbk-if-id – Loopback interface identifier, Range: 0 – 16383

• vl-if-id – VLAN interface identifier, Range : 1 – 4094

• timeout-value – Enter the RADIUS server timeout value, Range: 1 – 60, Default: 5

• mgmt – Management VRF, Default: no VRF

• config radius add [OPTIONS] <ip_address>

• config radius delete [OPTIONS] <ip_address>

sonic# sonic# configure terminal
sonic(config)# radius-server host 1.2.3.4 auth-port 32 key abcd123 auth-type chap priority 3 retransmit 3 source-interface Ethernet 0 timeout 4 vrf mgmt
sonic(config)# no radius-server host 1.2.3.4
sonic(config)#