Cisco Catalyst 2960-X User Manual

Restrictions for Configuring IPv4 Access Control Lists
General Network Security
The following are restrictions for configuring network security with ACLs:
•
Not all commands that accept a numbered ACL accept a named ACL. ACLs for packet filters and route
filters on interfaces can use a name. VLAN maps also accept a name.
•
A standard ACL and an extended ACL cannot have the same name.
•
Though visible in the command-line help strings, appletalk is not supported as a matching condition
for the deny and permit MAC access-list configuration mode commands.
•
ACL wildcard is not supported in downstream client policy.
IPv4 ACL Network Interfaces
The following restrictions apply to IPv4 ACLs to network interfaces:
•
When controlling access to an interface, you can use a named or numbered ACL.
•
If you apply an ACL to a Layer 2 interface that is a member of a VLAN, the Layer 2 (port) ACL takes
precedence over an input Layer 3 ACL applied to the VLAN interface or a VLAN map applied to the
VLAN.
•
If you apply an ACL to a Layer 3 interface and routing is not enabled on the switch, the ACL only filters
packets that are intended for the CPU, such as SNMP, Telnet, or web traffic.
•
You do not have to enable routing to apply ACLs to Layer 2 interfaces.
By default, the router sends Internet Control Message Protocol (ICMP) unreachable messages when a
packet is denied by an access group on a Layer 3 interface. These access-group denied packets are not
dropped in hardware but are bridged to the switch CPU so that it can generate the ICMP-unreachable
message. They do not generate ICMP unreachable messages. ICMP unreachable messages can be disabled
on router ACLs with the no ip unreachables interface command.
Note
MAC ACLs on a Layer 2 Interface
After you create a MAC ACL, you can apply it to a Layer 2 interface to filter non-IP traffic coming in that
interface. When you apply the MAC ACL, consider these guidelines:
•
You can apply no more than one IP access list and one MAC access list to the same Layer 2 interface.
The IP access list filters only IP packets, and the MAC access list filters non-IP packets.
•
A Layer 2 interface can have only one MAC access list. If you apply a MAC access list to a Layer 2
interface that has a MAC ACL configured, the new ACL replaces the previously configured one.
Catalyst 2960-X Switch Security Configuration Guide, Cisco IOS Release 15.0(2)EX
140 OL-29048-01
Configuring IPv4 ACLs
Restrictions for Configuring IPv4 Access Control Lists

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