Radius Capture
This scenario shows how to capture and filter RADIUS messages after 802.1x/MAB authentication.
Test RADIUS Station-ID For 802.1X Authenticated Session
Description
DUT0 is configured with an 802.1x-authenticated interface and DUT1 acts as an 802.1x supplicant. RADIUS messages are captured in DUT0 to check if “Station-Id” attributes are included.
Scenario
Step 1: Set the following configuration in DUT0 :
set interfaces ethernet eth0 address 10.215.168.64/24 set interfaces ethernet eth2 address 192.168.100.1/24 set interfaces ethernet eth2 authenticator 802.1x max-retransmissions 2 set interfaces ethernet eth2 authenticator aaa accounting list1 set interfaces ethernet eth2 authenticator aaa authentication list1 set interfaces ethernet eth2 authenticator log-level debug set interfaces ethernet eth2 authenticator mode only-802.1x set interfaces ethernet eth2 authenticator quiet-period 60 set interfaces ethernet eth2 authenticator reauth-period 0 set system aaa group radius radgroup1 server serv1 set system aaa list list1 method 1 group radius radgroup1 set system aaa server radius serv1 address 10.215.168.1 set system aaa server radius serv1 encrypted-key U2FsdGVkX185phC1oxWmNZ/3VrJzl81MnqYEVUMCCw2itbXZYESegpB/Hg1QnaDUrmH4FqjaqhTIbUvU0e9QRw== set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
Step 2: Ping IP address 10.215.168.1 from DUT0:
admin@DUT0$ ping 10.215.168.1 count 1 size 56 timeout 1Show output
PING 10.215.168.1 (10.215.168.1) 56(84) bytes of data. 64 bytes from 10.215.168.1: icmp_seq=1 ttl=64 time=0.410 ms --- 10.215.168.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.410/0.410/0.410/0.000 ms
Note
Start packet capture in DUT0 to filter RADIUS messages
Step 3: Set the following configuration in DUT1 :
set interfaces ethernet eth2 address 192.168.100.2/24 set interfaces ethernet eth2 supplicant encrypted-password U2FsdGVkX197QkRwrwkd39paP1Sp8m2jaBE5O6euRTg= set interfaces ethernet eth2 supplicant username testing set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
Step 4: Ping IP address 192.168.100.1 from DUT1:
admin@DUT1$ ping 192.168.100.1 count 1 size 56 timeout 1Show output
PING 192.168.100.1 (192.168.100.1) 56(84) bytes of data. 64 bytes from 192.168.100.1: icmp_seq=1 ttl=64 time=444 ms --- 192.168.100.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 443.582/443.582/443.582/0.000 ms
Note
Stop packet capture in DUT0 and expect
the following RADIUS messages:
Show output
tcpdump: listening on eth0, link-type EN10MB (Ethernet), snapshot length 262144 bytes 14:34:02.412995 de:ad:be:ef:6c:00 > fe:30:0c:d4:fe:10, ethertype IPv4 (0x0800), length 183: (tos 0x0, ttl 64, id 5532, offset 0, flags [none], proto UDP (17), length 169) 10.215.168.64.45449 > 10.215.168.1.1813: [bad udp cksum 0x6696 -> 0x53d7!] RADIUS, length: 141 Accounting-Request (4), id: 0x0b, Authenticator: 1385e09785c6f1b035c3901b425f09ce Acct-Status-Type Attribute (40), length: 6, Value: Start 0x0000: 0000 0001 Acct-Authentic Attribute (45), length: 6, Value: RADIUS 0x0000: 0000 0001 User-Name Attribute (1), length: 9, Value: testing 0x0000: 7465 7374 696e 67 Called-Station-Id Attribute (30), length: 20, Value: DE-AD-BE-EF-6C-02: 0x0000: 4445 2d41 442d 4245 2d45 462d 3643 2d30 0x0010: 323a Service-Type Attribute (6), length: 6, Value: Framed 0x0000: 0000 0002 Calling-Station-Id Attribute (31), length: 19, Value: DE-AD-BE-EF-6C-12 0x0000: 4445 2d41 442d 4245 2d45 462d 3643 2d31 0x0010: 32 Acct-Session-Id Attribute (44), length: 18, Value: CD1FD94F02701EA0 0x0000: 4344 3146 4439 3446 3032 3730 3145 4130 NAS-Port-Type Attribute (61), length: 6, Value: Ethernet 0x0000: 0000 000f Connect-Info Attribute (77), length: 13, Value: Unsupported 0x0000: 556e 7375 7070 6f72 7465 64 NAS-Port-Id Attribute (87), length: 6, Value: eth2 0x0000: 6574 6832 Event-Timestamp Attribute (55), length: 6, Value: Mon Mar 23 14:34:02 2026 0x0000: 69c1 4f5a Acct-Delay-Time Attribute (41), length: 6, Value: 00 secs 0x0000: 0000 0000 1 packet captured 2 packets received by filter 0 packets dropped by kernel admin@osdx$
Test RADIUS Station-ID For MAB Authenticated Session
Description
DUT0 is configured with a MAB-authenticated interface. RADIUS messages are captured in DUT0 to check if “Station-Id” attributes are included.
Scenario
Step 1: Set the following configuration in DUT0 :
set interfaces ethernet eth0 address 10.215.168.64/24 set interfaces ethernet eth2 address 192.168.100.1/24 set interfaces ethernet eth2 authenticator aaa accounting list1 set interfaces ethernet eth2 authenticator aaa authentication list1 set interfaces ethernet eth2 authenticator log-level debug set interfaces ethernet eth2 authenticator mode only-MAB set interfaces ethernet eth2 authenticator quiet-period 60 set interfaces ethernet eth2 authenticator reauth-period 0 set system aaa group radius radgroup1 server serv1 set system aaa list list1 method 1 group radius radgroup1 set system aaa server radius serv1 address 10.215.168.1 set system aaa server radius serv1 encrypted-key U2FsdGVkX1+jUK+1IUA+bEHW5GaVbdKVL7bINfTv/dPcRWVFzjLf2Fy2NG0r8FEy+sU/acj/E9EHxHSLLf4HdQ== set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
Step 2: Ping IP address 10.215.168.1 from DUT0:
admin@DUT0$ ping 10.215.168.1 count 1 size 56 timeout 1Show output
PING 10.215.168.1 (10.215.168.1) 56(84) bytes of data. 64 bytes from 10.215.168.1: icmp_seq=1 ttl=64 time=0.297 ms --- 10.215.168.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.297/0.297/0.297/0.000 ms
Note
Start packet capture in DUT0 to filter RADIUS messages
Step 3: Set the following configuration in DUT1 :
set interfaces ethernet eth2 address 192.168.100.2/24 set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
Step 4: Ping IP address 192.168.100.1 from DUT1:
admin@DUT1$ ping 192.168.100.1 count 1 size 56 timeout 1Show output
PING 192.168.100.1 (192.168.100.1) 56(84) bytes of data. 64 bytes from 192.168.100.1: icmp_seq=1 ttl=64 time=0.380 ms --- 192.168.100.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.380/0.380/0.380/0.000 ms
Note
Stop packet capture in DUT0 and expect
the following RADIUS messages:
Show output
tcpdump: listening on eth0, link-type EN10MB (Ethernet), snapshot length 262144 bytes 14:34:14.471502 de:ad:be:ef:6c:00 > fe:30:0c:d4:fe:10, ethertype IPv4 (0x0800), length 193: (tos 0x0, ttl 64, id 41883, offset 0, flags [none], proto UDP (17), length 179) 10.215.168.64.45025 > 10.215.168.1.1813: [bad udp cksum 0x66a0 -> 0xdf40!] RADIUS, length: 151 Accounting-Request (4), id: 0x01, Authenticator: 44fb47521b8e2f5d0a7ffec6eda3287c Acct-Status-Type Attribute (40), length: 6, Value: Start 0x0000: 0000 0001 Acct-Authentic Attribute (45), length: 6, Value: Local 0x0000: 0000 0002 User-Name Attribute (1), length: 19, Value: de:ad:be:ef:6c:12 0x0000: 6465 3a61 643a 6265 3a65 663a 3663 3a31 0x0010: 32 Called-Station-Id Attribute (30), length: 20, Value: DE-AD-BE-EF-6C-02: 0x0000: 4445 2d41 442d 4245 2d45 462d 3643 2d30 0x0010: 323a Service-Type Attribute (6), length: 6, Value: Framed 0x0000: 0000 0002 Calling-Station-Id Attribute (31), length: 19, Value: DE-AD-BE-EF-6C-12 0x0000: 4445 2d41 442d 4245 2d45 462d 3643 2d31 0x0010: 32 Acct-Session-Id Attribute (44), length: 18, Value: 1033EC78B61601C4 0x0000: 3130 3333 4543 3738 4236 3136 3031 4334 NAS-Port-Type Attribute (61), length: 6, Value: Ethernet 0x0000: 0000 000f Connect-Info Attribute (77), length: 13, Value: Unsupported 0x0000: 556e 7375 7070 6f72 7465 64 NAS-Port-Id Attribute (87), length: 6, Value: eth2 0x0000: 6574 6832 Event-Timestamp Attribute (55), length: 6, Value: Mon Mar 23 14:34:14 2026 0x0000: 69c1 4f66 Acct-Delay-Time Attribute (41), length: 6, Value: 00 secs 0x0000: 0000 0000 1 packet captured 2 packets received by filter 0 packets dropped by kernel admin@osdx$