Specifications

1-6
Catalyst 2950 and Catalyst 2955 Switch Command Reference
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Chapter 1 Using the Command-Line Interface
Command Summary
Command Summary
Table 1-2 lists and describes commands for the Catalyst 2950 switch that have the same function but
different syntax in software releases earlier than Release 12.1(6)EA2 and in Release 12.1(6)EA2 or later.
It lists the commands supported in releases earlier than Release 12.1(6)EA2, the equivalent commands
in Release 12.1(6)EA2 or later, and command descriptions.
If you are running Release 12.1(6)EA2 or later, the switch supports the commands in the left column of
Table 1-2 only if they are in a saved configuration file. When you save the switch configuration after
modifying it, the commands in Table 1-2 are replaced by equivalent commands supported in
Release 12.1(6)EA2 or later.
For information about commands listed in the left column of Table 1-2, refer to the Catalyst 2950
Desktop Switch Command Reference, Cisco IOS Release 12.0(5.2)WC(1) (April 2001). You can access
this document at this URL:
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2950/2950_wc/index.htm.
Table 1-2 Command Comparison
Command in IOS releases
earlier than
Release 12.1(6)EA2
Command in
Release 12.1(6)EA2 or later Description
mac-address-table secure switchport port-security
mac-address
Adds secure addresses to the MAC
address table.
no negotiation auto speed nonegotiate Disables autonegotiation on
1000BASE-X, -LX, and -ZX GBIC
1
ports.
port group channel-group Assigns a port to a Fast EtherChannel or
Gigabit EtherChannel port group.
port monitor monitor session Enables SPAN
2
port monitoring on a
port.
port protected switchport protected Isolates Layer 2 unicast, multicast, and
broadcast traffic from other protected
ports on the same switch.
port security switchport port-security Enables port security on a port and
restricts the use of the port to a
user-defined group of stations.
port security action switchport port-security
violation
Specifies the action to take when an
address violation occurs on a secure
port.
port security
max-mac-count
switchport port-security
maximum
Specifies the maximum number of
secure addresses supported by a secure
port.
port storm-control storm-control Enables unicast, multicast, or broadcast
storm control on a port, and specifies
storm-control parameters on a port.
show mac-address-table
secure
show port-security Displays the port security settings for
an interface and the secure addresses in
the MAC address table.