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A-5
Catalyst 2960 and 2960-S Switch Software Configuration Guide
OL-8603-09
Appendix A Recommendations for Upgrading a Catalyst 2950 Switch to a Catalyst 2960 Switch
Feature Behavior Incompatibilities
Feature Behavior Incompatibilities
Some features behave differently on the Catalyst 2950 and Catalyst 2960 switches, and some features
are not supported on the Catalyst 2960 switch:
• Access control lists (ACLs)
Even though the command syntax is the same on the Catalyst 2960 switch and on the Catalyst 2950
switch, the semantics of the IP and the MAC ACL between the two platforms differ. For example,
you can apply MAC ACLs for IP packets on the Catalyst 2950 switch, but on the Catalyst 2960
switch:
–
You cannot apply MAC ACLs to IP packets.
–
You cannot apply any ACLs for IPv6 frames.
–
With MAC ACLs, an Ethertype of Appletalk is not supported.
• QoS
The Catalyst 2960 switch uses different port hardware than the Catalyst 2950 switch, and more QoS
features are offered on the Catalyst 2960 switch. For example, the Catalyst 2950 switch supports
WRR scheduling, whereas the Catalyst 2960 switch supports SRR scheduling. Also, you must
enable QoS globally on the Catalyst 2960 switch, whereas QoS is enabled by default on the Catalyst
2950 switch. For more information, see Chapter 33, “Configuring QoS.”
RSPAN
3
You have to specify one port as the reflector port with
this global configuration command:
monitor session session_number destination remote
vlan vlan-id reflector-port interface-id
Because of advanced hardware in the
Catalyst 2960 switch, you do not need to
configure a reflector port.
The Catalyst 2960 switch accepts the monitor
session session-number destination remote vlan
vlan-id reflector-port interface-id command,
and this message appears:
Note: Reflector port configuration is not
required on this platform, ignoring the
reflector port configuration
STP The Catalyst 2950 switch supports cross-stack
UplinkFast on GBIC
4
interfaces. You enable the stack
port with this interface configuration command:
spanning-tree stack-port
The Catalyst 2960 switch does not support
GBIC interfaces.
It rejects the command, and this message
appears:
Switch(config-if)# spanning-tree
stack-port
^
%Invalid input detected at ‘^’ marker.
1. IGMP = Internet Group Management Protocol
2. QoS = quality of service
3. RSPAN = Remote Switched Port Analyzer
4. GBIC = Gigabit Interface Converter
Table A-1 Catalyst 2950 and 2960 Switch Configuration Incompatibilities (continued)
Feature Catalyst 2950 Switch Command and Explanation Result on the Catalyst 2960 Switch