Cisco WS-C2960-24TC-S Software Guide - Page 684
Feature, Catalyst 2950 Switch Command and Explanation, Result on the Catalyst 2960 Switch, aaa preauth
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Configuration Compatibility Issues Appendix C Recommendations for Upgrading a Catalyst 2950 Switch to a Catalyst 2960 Switch Table C-1 Catalyst 2950 and 2960 Switch Configuration Incompatibilities Feature AAA Clustering DHCP snooping Flow control Catalyst 2950 Switch Command and Explanation Result on the Catalyst 2960 Switch These global configuration commands are in Cisco IOS 12.1EA: aaa preauth aaa processes 1-64 aaa route download 1-1440 When Cisco IOS 12.2E was restructured, these commands were intentionally removed and are not supported in Cisco IOS 12.2SE. The Catalyst 2960 switch rejects these commands, and this message appears: Switch(config)# aaa processes 10 ^ %Invalid input detected at '^' marker. The Catalyst 2950 switch supports only one management VLAN. You can use this global configuration command to change it: cluster management-vlan vlan-id This command communicates the management VLAN when the switch is configured for clustering. With the Catalyst 2960 switch, you can connect to candidate and cluster member switches through any VLAN in common with the cluster command switch. The Catalyst 2960 switch rejects the command, and this message appears: Switch(config)# cluster management-vlan 2 ^ %Invalid input detected at '^' marker. A Catalyst 2950 switch DHCP snooping feature limits the number of DHCP packets per second that an interface can receive. You use this interface configuration command to configure it: ip dhcp snooping limit rate rate The range is 1 to 4294967294, and by default, the rate limit is not configured. In Cisco IOS 12.2SE, the range was changed to 1 to 2048 messages per second. The Catalyst 2960 switch accepts any range value. It changes the maximum value to 2048 (if it is more than 2048), and this message appears: %Invalid input detected at '^' marker.% The Catalyst 2950 switch supports pause frames on Gigabit Ethernet interfaces. You use this interface configuration command to configure it: flowcontrol send {desired | off | on} The Catalyst 2960 switch accepts received pause frames but cannot send them. The flowcontrol send command is not supported on the Catalyst 2960 switch. The Catalyst 2960 switch rejects the command, and this message appears: Switch(config-if)# flowcontrol send desired ^ %Invalid input detected at '^' marker. You can configure QoS to restrict data traffic without affecting the control traffic. With flow control, all traffic is stopped. For more information, see Chapter 28, "Configuring QoS." Catalyst 2960 Switch Software Configuration Guide C-2 OL-8603-04
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