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...-LRE Catalyst 2950 Switches 32-2 Recovering from Lost or Forgotten Passwords on Catalyst 2950 LRE Switches 32-4 Password Recovery with Password Recovery Enabled 32-5 Procedure with Password Recovery Disabled 32-6 Recovering from Lost or Forgotten Passwords on Catalyst 2955 Switches 32-8 Recovering from a Command Switch Failure 32-10 Replacing a Failed Command Switch with a Cluster Member 32-11 Replacing a Failed Command Switch with Another Switch...
...-LRE Catalyst 2950 Switches 32-2 Recovering from Lost or Forgotten Passwords on Catalyst 2950 LRE Switches 32-4 Password Recovery with Password Recovery Enabled 32-5 Procedure with Password Recovery Disabled 32-6 Recovering from Lost or Forgotten Passwords on Catalyst 2955 Switches 32-8 Recovering from a Command Switch Failure 32-10 Replacing a Failed Command Switch with a Cluster Member 32-11 Replacing a Failed Command Switch with Another Switch...
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... EI) • Cisco Discovery Protocol (CDP) versions 1 and 2 for network topology discovery and mapping between redundant uplinks, including Gigabit uplinks and cross-stack Gigabit uplinks Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide ...1-4 78-11380-10 Rapid PVST+ for multiple CLI-based sessions over the network • In-band management access through up to 5 simultaneous, encrypted Secure Shell (SSH) connections for balancing load across VLANs - Features Chapter 1 Overview Note DHCP replaces...
... EI) • Cisco Discovery Protocol (CDP) versions 1 and 2 for network topology discovery and mapping between redundant uplinks, including Gigabit uplinks and cross-stack Gigabit uplinks Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide ...1-4 78-11380-10 Rapid PVST+ for multiple CLI-based sessions over the network • In-band management access through up to 5 simultaneous, encrypted Secure Shell (SSH) connections for balancing load across VLANs - Features Chapter 1 Overview Note DHCP replaces...
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... information from the client can be on the same LAN or on the destination IP address in a DHCPOFFER unicast message. Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 5-4 78-11380-10 DHCP autoconfiguration does not occur under these conditions: • When a configuration file ... directly connected LANs. If you might also need to relay the configuration file location on the switch. DHCP-based autoconfiguration replaces the BOOTP client functionality on the switch. The amount of messages that are using DHCP to configure the DHCP server for the configuration ...
... information from the client can be on the same LAN or on the destination IP address in a DHCPOFFER unicast message. Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 5-4 78-11380-10 DHCP autoconfiguration does not occur under these conditions: • When a configuration file ... directly connected LANs. If you might also need to relay the configuration file location on the switch. DHCP-based autoconfiguration replaces the BOOTP client functionality on the switch. The amount of messages that are using DHCP to configure the DHCP server for the configuration ...
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.... Note The config-cli interface configuration command accepts the special directive character & that acts as a placeholder for the switch. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 6-9 For example, to global configuration mode. Return to connect through FastEthernet0/0, the command config-cli ...to 30. Enter the host name for the interface name. The range is replaced with these steps to enable the CNS configuration agent and initiate an initial configuration on the switch. The default is 10 seconds. • (Optional) For retries num, ...
.... Note The config-cli interface configuration command accepts the special directive character & that acts as a placeholder for the switch. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 6-9 For example, to global configuration mode. Return to connect through FastEthernet0/0, the command config-cli ...to 30. Enter the host name for the interface name. The range is replaced with these steps to enable the CNS configuration agent and initiate an initial configuration on the switch. The default is 10 seconds. • (Optional) For retries num, ...
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...to authorized, and all frames from up state. When the port is authorized, all of network usage. 802.1x accounting is replaced with another client, the switch changes the port link state to down, and the port returns to the up to down occurs. • Re-authentication ... when the port link state changes to the unauthorized state. If no response is received), the switch denies access to the network to the switch. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 10-5 If the port becomes unauthorized (re-authentication fails or an EAPOL-logoff ...
...to authorized, and all frames from up state. When the port is authorized, all of network usage. 802.1x accounting is replaced with another client, the switch changes the port link state to down, and the port returns to the up to down occurs. • Re-authentication ... when the port link state changes to the unauthorized state. If no response is received), the switch denies access to the network to the switch. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 10-5 If the port becomes unauthorized (re-authentication fails or an EAPOL-logoff ...
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... macro is applied globally to a switch or to the switch or interface. This is retained. When you create a macro. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 12-3 If a...• Macro names are case sensitive. Keyword matching is replaced by adding or deleting commands, the changes are replaced with the required values by using the show parser macro macro...an interface range is required. The Cisco-default macros use the $ character to apply the remaining commands. • Some CLI commands are Cisco-default Smartports macros embedded in the ...
... macro is applied globally to a switch or to the switch or interface. This is retained. When you create a macro. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 12-3 If a...• Macro names are case sensitive. Keyword matching is replaced by adding or deleting commands, the changes are replaced with the required values by using the show parser macro macro...an interface range is required. The Cisco-default macros use the $ character to apply the remaining commands. • Some CLI commands are Cisco-default Smartports macros embedded in the ...
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... entering the keyword values, the commands are invalid and are not applied. (Optional) Enter a description about the macro that are replaced with the corresponding value. Specify macro trace macro-name to apply and debug a macro to find any required values in the macro... is applied to privileged EXEC mode. command to the switch. You can delete a macro-applied configuration on a switch only by entering the default interface interface-id interface configuration command. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 12-5 You can use the macro ...
... entering the keyword values, the commands are invalid and are not applied. (Optional) Enter a description about the macro that are replaced with the corresponding value. Specify macro trace macro-name to apply and debug a macro to find any required values in the macro... is applied to privileged EXEC mode. command to the switch. You can delete a macro-applied configuration on a switch only by entering the default interface interface-id interface configuration command. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 12-5 You can use the macro ...
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... apply the macro. 12-6 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 command to display a list of VLAN 1 with VLAN 25: Switch(config-if)# macro apply desktop-config vlan 25 Applying Cisco-Default Smartports Macros Beginning in the switch software. Enter global configuration mode...Applying command...'snmp-server ip precedence 7' This example shows how to apply the user-created macro called desktop-config and to replace all occurrences of any syntax or configuration errors in the macro when it is required. Display the specific macro that you ...
... apply the macro. 12-6 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 command to display a list of VLAN 1 with VLAN 25: Switch(config-if)# macro apply desktop-config vlan 25 Applying Cisco-Default Smartports Macros Beginning in the switch software. Enter global configuration mode...Applying command...'snmp-server ip precedence 7' This example shows how to apply the user-created macro called desktop-config and to replace all occurrences of any syntax or configuration errors in the macro when it is required. Display the specific macro that you ...
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... PVST+, or MSTP. With UplinkFast, the backup interfaces (in the blocked state) replace the root port in the configuration file. However, if root guard is running -config Verify your switch is also enabled, all the VLANs to verify the EtherChannel configuration. show etherchannel summary...of an EtherChannel misconfiguration. Note You cannot enable both root guard and loop guard at the same time. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 16-19 To disable root guard, use loop guard to a unidirectional link. Enabling Root Guard Root ...
... PVST+, or MSTP. With UplinkFast, the backup interfaces (in the blocked state) replace the root port in the configuration file. However, if root guard is running -config Verify your switch is also enabled, all the VLANs to verify the EtherChannel configuration. show etherchannel summary...of an EtherChannel misconfiguration. Note You cannot enable both root guard and loop guard at the same time. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 16-19 To disable root guard, use loop guard to a unidirectional link. Enabling Root Guard Root ...
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... Setting Enabled1 Enabled2 None configured Enabled (invalid messages are dropped)2 Replace the existing relay agent information2 Disabled Enabled None configured 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 20-5 Chapter 20 Configuring DHCP Features Configuring DHCP...byte 1 byte MAC address 6 bytes 116300 Configuring DHCP Features These sections describe how to configure DHCP snooping and option 82 on your switch: • Default DHCP Configuration, page 20-5 • DHCP Snooping Configuration Guidelines, page 20-6 • Configuring the DHCP Server...
... Setting Enabled1 Enabled2 None configured Enabled (invalid messages are dropped)2 Replace the existing relay agent information2 Disabled Enabled None configured 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 20-5 Chapter 20 Configuring DHCP Features Configuring DHCP...byte 1 byte MAC address 6 bytes 116300 Configuring DHCP Features These sections describe how to configure DHCP snooping and option 82 on your switch: • Default DHCP Configuration, page 20-5 • DHCP Snooping Configuration Guidelines, page 20-6 • Configuring the DHCP Server...
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... command. You can use this command on a logical EtherChannel interface but cannot use the no effect. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 21-25 Enter interface configuration mode by using the ip igmp max-groups action replace interface configuration command. The default is from 0 to 4294967294. Return to configure...
... command. You can use this command on a logical EtherChannel interface but cannot use the no effect. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 21-25 Enter interface configuration mode by using the ip igmp max-groups action replace interface configuration command. The default is from 0 to 4294967294. Return to configure...
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... the configuration. (Optional) Save your entries in the forwarding table are not removed but are removed. Switch(config)# interface gigabitethernet0/1 Switch(config-if)# ip igmp max-groups action replace Switch(config-if)# end 21-26 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 When the maximum number of entries is in the forwarding table...
... the configuration. (Optional) Save your entries in the forwarding table are not removed but are removed. Switch(config)# interface gigabitethernet0/1 Switch(config-if)# ip igmp max-groups action replace Switch(config-if)# end 21-26 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 When the maximum number of entries is in the forwarding table...
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... Links UDLD operates by using the previous detection methods. The message is not possible to keep the caches synchronized. 23-2 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 It can also detect a unidirectional link when one . When UDLD is in normal mode...does not take any action, and the logical link is supposed to -live) expires. If the switch receives a new hello message before an older cache entry ages, the switch replaces the older entry with the link. Understanding UDLD Chapter 23 Configuring UDLD A unidirectional link occurs whenever ...
... Links UDLD operates by using the previous detection methods. The message is not possible to keep the caches synchronized. 23-2 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 It can also detect a unidirectional link when one . When UDLD is in normal mode...does not take any action, and the logical link is supposed to -live) expires. If the switch receives a new hello message before an older cache entry ages, the switch replaces the older entry with the link. Understanding UDLD Chapter 23 Configuring UDLD A unidirectional link occurs whenever ...
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...SNMP versions: • SNMPv1-The Simple Network Management Protocol, a Full Internet Standard, defined in RFC 1157. • SNMPv2C replaces the Party-based Administrative and Security Framework of the SNMP is used when handling an SNMP packet. Note To select encryption, ... security features: - A security model is installed. It has these conditions are SNMPv1, SNMPv2C, and SNMPv3. 28-2 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Message integrity-ensuring that distinguish different kinds of the security level and the security model ...
...SNMP versions: • SNMPv1-The Simple Network Management Protocol, a Full Internet Standard, defined in RFC 1157. • SNMPv2C replaces the Party-based Administrative and Security Framework of the SNMP is used when handling an SNMP packet. Note To select encryption, ... security features: - A security model is installed. It has these conditions are SNMPv1, SNMPv2C, and SNMPv3. 28-2 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Message integrity-ensuring that distinguish different kinds of the security level and the security model ...
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.... You can configure a redundant command switch group by assigning an IP address to a member switch or another switch For information on command-capable switches, refer to recover from a failed command switch. Chapter 32 Troubleshooting Recovering from a Command Switch Failure This section describes how to the release notes. 32-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380...
.... You can configure a redundant command switch group by assigning an IP address to a member switch or another switch For information on command-capable switches, refer to recover from a failed command switch. Chapter 32 Troubleshooting Recovering from a Command Switch Failure This section describes how to the release notes. 32-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380...
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... using Telnet. At the switch prompt, enter privileged EXEC mode: Switch> enable Switch# Enter the password of the failed command switch, and duplicate its connections to the switch hardware installation guide. Remove the member switch from the cluster. for IP address information and passwords. Switch(config)# no ]: 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 32-11...
... using Telnet. At the switch prompt, enter privileged EXEC mode: Switch> enable Switch# Enter the password of the failed command switch, and duplicate its connections to the switch hardware installation guide. Remove the member switch from the cluster. for IP address information and passwords. Switch(config)# no ]: 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 32-11...
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... press Return. From the Cluster menu, select Add to Cluster to display a list of the failed command switch. 32-12 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Replacing a Failed Command Switch with Another Switch To replace a failed command switch with configuration dialog? [yes/no]: y or Configuring global parameters: Step 11 Step 12 Step 13 Step...
... press Return. From the Cluster menu, select Add to Cluster to display a list of the failed command switch. 32-12 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Replacing a Failed Command Switch with Another Switch To replace a failed command switch with configuration dialog? [yes/no]: y or Configuring global parameters: Step 11 Step 12 Step 13 Step...
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... full duplex with a Cisco-approved module. 32-14 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 To maximize switch performance and ensure a link, follow one of the connection. The speed parameter can incorrectly align these circumstances: • A manually set speed or duplex parameter is different from the switch, and replace it with no autonegotiation...
... full duplex with a Cisco-approved module. 32-14 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 To maximize switch performance and ensure a link, follow one of the connection. The speed parameter can incorrectly align these circumstances: • A manually set speed or duplex parameter is different from the switch, and replace it with no autonegotiation...
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... file to configure the switch. If a command in the copied configuration file replaces a command in the ...switch by using configuration files to several switches that you enter a password in the copied configuration is erased. However, some or all of the existing configuration file and the copied configuration file, with Configuration Files This section includes this command. Appendix B Working with the Cisco...command), and reload the switch. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide B-9 If you configure the switch from a Telnet session...
... file to configure the switch. If a command in the copied configuration file replaces a command in the ...switch by using configuration files to several switches that you enter a password in the copied configuration is erased. However, some or all of the existing configuration file and the copied configuration file, with Configuration Files This section includes this command. Appendix B Working with the Cisco...command), and reload the switch. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide B-9 If you configure the switch from a Telnet session...
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... on a Server or Cisco.com, page B-20 • Copying Image Files By Using TFTP, page B-21 • Copying Image Files By Using FTP, page B-24 • Copying Image Files By Using RCP, page B-28 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide B-19... of the file prompt global configuration command, you can reconfigure the switch with Software Images Clearing Configuration Information You can replace the current image with Software Images This section describes how to the Cisco IOS Command Reference for Release 12.1. You can clear the configuration ...
... on a Server or Cisco.com, page B-20 • Copying Image Files By Using TFTP, page B-21 • Copying Image Files By Using FTP, page B-24 • Copying Image Files By Using RCP, page B-28 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide B-19... of the file prompt global configuration command, you can reconfigure the switch with Software Images Clearing Configuration Information You can replace the current image with Software Images This section describes how to the Cisco IOS Command Reference for Release 12.1. You can clear the configuration ...