Cisco Catalyst 2960-X User Manual

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Ports that are already authenticated and that do not have periodic re-authentication enabled remain in
the authenticated state. Communication with the RADIUS server is not required.
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Ports that are already authenticated and that have periodic re-authentication enabled (with the dot1x
re-authentication global configuration command) fail the authentication process when the
re-authentication occurs. Ports return to the unauthenticated state during the re-authentication process.
Communication with the RADIUS server is required.
For an ongoing authentication, the authentication fails immediately because there is no server connectivity.
If the switch that failed comes up and rejoins the switch stack, the authentications might or might not fail
depending on the boot-up time and whether the connectivity to the RADIUS server is re-established by the
time the authentication is attempted.
To avoid loss of connectivity to the RADIUS server, you should ensure that there is a redundant connection
to it. For example, you can have a redundant connection to the stack master and another to a stack member,
and if the stack master fails, the switch stack still has connectivity to the RADIUS server.
802.1x Host Mode
You can configure an 802.1x port for single-host or for multiple-hosts mode. In single-host mode, only one
client can be connected to the 802.1x-enabled switch port. The switch detects the client by sending an EAPOL
frame when the port link state changes to the up state. If a client leaves or is replaced with another client, the
switch changes the port link state to down, and the port returns to the unauthorized state.
In multiple-hosts mode, you can attach multiple hosts to a single 802.1x-enabled port. In this mode, only one
of the attached clients must be authorized for all clients to be granted network access. If the port becomes
unauthorized (re-authentication fails or an EAPOL-logoff message is received), the switch denies network
access to all of the attached clients. In this topology, the wireless access point is responsible for authenticating
the clients attached to it, and it also acts as a client to the switch.
Figure 21: Multiple Host Mode Example
For all host modes, the line protocol stays up before authorization when port-based authentication is
configured.
Note
The switch supports multidomain authentication (MDA), which allows both a data device and a voice device,
such as an IP Phone (Cisco or non-Cisco), to connect to the same switch port.
Catalyst 2960-X Switch Security Configuration Guide, Cisco IOS Release 15.0(2)EX
272 OL-29048-01
Configuring IEEE 802.1x Port-Based Authentication
802.1x Host Mode

Cisco Catalyst 2960-X Specifications

General

Console port	RJ-45
USB 2.0 ports quantity	2
SFP module slots quantity	4
Installed SFP modules quantity	-
Gigabit Ethernet (copper) ports quantity	48
Basic switching RJ-45 Ethernet ports type	Gigabit Ethernet (10/100/1000)
Power source	AC
Input current	5 A
AC input voltage	100 - 240 V
Power consumption (typical)	60.9 W
Number of power supply units	1
Redundant power supply (RPS) support	Yes
Operating altitude	0 - 3000 m
Non-operating altitude	0 - 4000 m
Storage temperature (T-T)	-25 - 70 °C
Operating temperature (T-T)	-5 - 40 °C
Operating relative humidity (H-H)	10 - 95 %
Switching protocols	UDP, TCP, RADIUS/TACACS+
Number of VLANs	1023
Networking standards	IEEE 802.1ab, IEEE 802.1D, IEEE 802.1p, IEEE 802.1Q, IEEE 802.1s, IEEE 802.1w, IEEE 802.1x, IEEE 802.3, IEEE 802.3ab, IEEE 802.3ad, IEEE 802.3ae, IEEE 802.3af, IEEE 802.3ah, IEEE 802.3at, IEEE 802.3az, IEEE 802.3u, IEEE 802.3x, IEEE 802.3z
Throughput	107.1 Mpps
Jumbo frames	9216
Number of queues	8
MAC address table	16000 entries
Number of static routes	1000
DHCP features	DHCP server
Authentication	MAC-based authentication, Port-based authentication
Security algorithms	802.1x RADIUS, SNMP, SSH
Access Control List (ACL) rules	3
Switch type	Managed
Switch layer	L2/L3
Safety	UL 60950-1, CAN/CSA-C22.2 No. 60950-1, EN 60950-1, IEC 60950-1, AS/NZS 60950-1
Form factor	1U
Product color	Black
Total Power over Ethernet (PoE) budget	370 W
Power over Ethernet (PoE) ports quantity	24
Power over Ethernet plus (PoE+) ports quantity	12
Memory type	DRAM
Noise level	39 dB
Flash memory	128 MB
Internal memory	512 MB
Processor frequency	600 MHz
Mean time between failures (MTBF)	276870 h

Weight and Dimensions

Depth	368 mm
Width	445 mm
Height	45 mm
Weight	5800 g