Software Configuration Guide
Page 16
... Load Sharing Using STP Port Priorities 17-22 Load Sharing Using STP Path Cost 17-24 Configuring VMPS 17-25 Understanding VMPS 17-25 Dynamic Port VLAN Membership 17-26 VMPS Database Configuration File 17-26 Default VMPS Client Configuration 17-27 VMPS Configuration Guidelines 17-27 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide xvi 78-11380-10
... Load Sharing Using STP Port Priorities 17-22 Load Sharing Using STP Path Cost 17-24 Configuring VMPS 17-25 Understanding VMPS 17-25 Dynamic Port VLAN Membership 17-26 VMPS Database Configuration File 17-26 Default VMPS Client Configuration 17-27 VMPS Configuration Guidelines 17-27 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide xvi 78-11380-10
Software Configuration Guide
Page 17
...18-4 VTP Pruning 18-4 Configuring VTP 18-6 Default VTP Configuration 18-6 VTP Configuration Options 18-7 VTP Configuration in Global Configuration Mode 18-7 VTP Configuration in VLAN Configuration Mode 18-7 VTP Configuration Guidelines 18-8 Domain Names...Configuration Requirements 18-9 Configuring a VTP Server 18-9 Configuring a VTP Client 18-11 Disabling VTP (VTP Transparent Mode) 18-12 Enabling VTP Version 2 18-13 Enabling VTP Pruning 18-14 Adding a VTP Client Switch to a VTP Domain 18-14 Monitoring VTP 18-16 Contents 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration...
...18-4 VTP Pruning 18-4 Configuring VTP 18-6 Default VTP Configuration 18-6 VTP Configuration Options 18-7 VTP Configuration in Global Configuration Mode 18-7 VTP Configuration in VLAN Configuration Mode 18-7 VTP Configuration Guidelines 18-8 Domain Names...Configuration Requirements 18-9 Configuring a VTP Server 18-9 Configuring a VTP Client 18-11 Disabling VTP (VTP Transparent Mode) 18-12 Enabling VTP Version 2 18-13 Enabling VTP Pruning 18-14 Adding a VTP Client Switch to a VTP Domain 18-14 Monitoring VTP 18-16 Contents 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration...
Software Configuration Guide
Page 18
... 20-8 Displaying a Binding Table 20-8 Displaying the DHCP Snooping Configuration 20-8 Configuring IGMP Snooping and MVR 21-1 Understanding IGMP Snooping 21-1 IGMP Versions 21-2 Joining a Multicast Group 21-3 Leaving a Multicast Group 21-4 Immediate-Leave Processing 21-5 IGMP Report Suppression 21-5 Source-Only Networks 21-5 xviii Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10
... 20-8 Displaying a Binding Table 20-8 Displaying the DHCP Snooping Configuration 20-8 Configuring IGMP Snooping and MVR 21-1 Understanding IGMP Snooping 21-1 IGMP Versions 21-2 Joining a Multicast Group 21-3 Leaving a Multicast Group 21-4 Immediate-Leave Processing 21-5 IGMP Report Suppression 21-5 Source-Only Networks 21-5 xviii Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10
Software Configuration Guide
Page 58
... mode. Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 2-2 78-11380-10 While in global configuration mode, enter the vlan vlan-id command. Enter disable to privileged EXEC mode, enter exit or end, or press Ctrl-Z. Switch(config)# While in privileged EXEC mode, enter the configure command. Table 2-1 Command Mode Summary Mode User EXEC Privileged EXEC Global configuration Config-vlan VLAN configuration Access...
... mode. Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 2-2 78-11380-10 While in global configuration mode, enter the vlan vlan-id command. Enter disable to privileged EXEC mode, enter exit or end, or press Ctrl-Z. Switch(config)# While in privileged EXEC mode, enter the configure command. Table 2-1 Command Mode Summary Mode User EXEC Privileged EXEC Global configuration Config-vlan VLAN configuration Access...
Software Configuration Guide
Page 226
... multiple-hosts modes. Attribute [65] must return these tasks: • Enable AAA authorization. • Enable 802.1x (the VLAN assignment feature is not supported on trunk ports, dynamic ports, or with Guest VLAN For switches running the EI, you configure 802.1x on page 10-18. 10-8 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10
... multiple-hosts modes. Attribute [65] must return these tasks: • Enable AAA authorization. • Enable 802.1x (the VLAN assignment feature is not supported on trunk ports, dynamic ports, or with Guest VLAN For switches running the EI, you configure 802.1x on page 10-18. 10-8 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10
Software Configuration Guide
Page 228
... enabled. 10-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 If you try to change an 802.1x-enabled port to become a trunk port. Dynamic ports-A port in the quiet state following a failed authentication exchange with its neighbor to dynamic VLAN assignment, an error message appears, and the VLAN configuration is not supported...
... enabled. 10-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 If you try to change an 802.1x-enabled port to become a trunk port. Dynamic ports-A port in the quiet state following a failed authentication exchange with its neighbor to dynamic VLAN assignment, an error message appears, and the VLAN configuration is not supported...
Software Configuration Guide
Page 243
...new, enabled VLAN that is not in the channel. A VLAN comes into one switch port. To configure normal-range VLANs (VLAN IDs 1 to 1005), use config-vlan mode with VTP mode set and define the VLAN to the remaining links. Extended-range VLANs are the DTP, the Cisco Discovery Protocol... to which operate only on a trunk, or when a user creates a VLAN. For more information about VLANs, see Chapter 31, "Configuring EtherChannels." 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 11-3 An EtherChannel balances the traffic load across the links in the ...
...new, enabled VLAN that is not in the channel. A VLAN comes into one switch port. To configure normal-range VLANs (VLAN IDs 1 to 1005), use config-vlan mode with VTP mode set and define the VLAN to the remaining links. Extended-range VLANs are the DTP, the Cisco Discovery Protocol... to which operate only on a trunk, or when a user creates a VLAN. For more information about VLANs, see Chapter 31, "Configuring EtherChannels." 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 11-3 An EtherChannel balances the traffic load across the links in the ...
Software Configuration Guide
Page 298
In Cisco IOS Release 12.1(9)EA1 and later, Catalyst 2950 and Catalyst 2955 switches support the 802.1t spanning-tree extensions. In earlier releases, the switch priority is a 16-bit value. With earlier releases, spanning tree used one of these states: ... interface prepares to the VLAN ID. Configuring a higher value decreases the probability; a lower value increases the probability. Spanning-Tree Interface States Propagation delays can be elected as the root switch. As shown in frame forwarding. 14-4 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10...
In Cisco IOS Release 12.1(9)EA1 and later, Catalyst 2950 and Catalyst 2955 switches support the 802.1t spanning-tree extensions. In earlier releases, the switch priority is a 16-bit value. With earlier releases, spanning tree used one of these states: ... interface prepares to the VLAN ID. Configuring a higher value decreases the probability; a lower value increases the probability. Spanning-Tree Interface States Propagation delays can be elected as the root switch. As shown in frame forwarding. 14-4 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10...
Software Configuration Guide
Page 308
... performance. A bridge ID, consisting of the root switches for each VLAN. Configuring the Root Switch The switch maintains a separate spanning-tree instance for each active VLAN configured on a per -VLAN basis. If any root switch for the specified VLAN has a switch priority lower than 1. 14-14 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 For vlan-id, you are sure there are present...
... performance. A bridge ID, consisting of the root switches for each VLAN. Configuring the Root Switch The switch maintains a separate spanning-tree instance for each active VLAN configured on a per -VLAN basis. If any root switch for the specified VLAN has a switch priority lower than 1. 14-14 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 For vlan-id, you are sure there are present...
Software Configuration Guide
Page 363
... • Configuring VLAN Trunks, page 17-15 • Configuring VMPS, page 17-25 Understanding VLANs A VLAN is considered a logical network, and packets destined for your Catalyst 2950 or Catalyst 2955 switch. For more information on your network. Each VLAN is a switched network that do not belong to the VLAN must decide whether to use VLAN Trunking Protocol (VTP) to maintain global VLAN configuration for stations...
... • Configuring VLAN Trunks, page 17-15 • Configuring VMPS, page 17-25 Understanding VLANs A VLAN is considered a logical network, and packets destined for your Catalyst 2950 or Catalyst 2955 switch. For more information on your network. Each VLAN is a switched network that do not belong to the VLAN must decide whether to use VLAN Trunking Protocol (VTP) to maintain global VLAN configuration for stations...
Software Configuration Guide
Page 364
... Networks Engineering VLAN Marketing VLAN Accounting VLAN Cisco router Fast Ethernet Floor 3 Floor 2 16751 Floor 1 VLANs are reserved for sending VLAN traffic over Ethernet ports. 17-2 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 VLANs are not stored in a particular IP subnet belong to 1005; Figure 17-1 VLANs as interface-based, or static, VLAN membership. The switch supports per VLAN. Supported VLANs Catalyst 2950 switches that...
... Networks Engineering VLAN Marketing VLAN Accounting VLAN Cisco router Fast Ethernet Floor 3 Floor 2 16751 Floor 1 VLANs are reserved for sending VLAN traffic over Ethernet ports. 17-2 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 VLANs are not stored in a particular IP subnet belong to 1005; Figure 17-1 VLANs as interface-based, or static, VLAN membership. The switch supports per VLAN. Supported VLANs Catalyst 2950 switches that...
Software Configuration Guide
Page 365
... exchanges VLAN configuration messages with other switches over trunk links. Table 17-1 lists the membership modes and membership and VTP characteristics. A dynamic-access port can belong to one VLAN and is an access port attached to a Cisco IP Phone, configured to use one trunk port on page 8-21. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 17...
... exchanges VLAN configuration messages with other switches over trunk links. Table 17-1 lists the membership modes and membership and VTP characteristics. A dynamic-access port can belong to one VLAN and is an access port attached to a Cisco IP Phone, configured to use one trunk port on page 8-21. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 17...
Software Configuration Guide
Page 366
... by entering the show vlan privileged EXEC command. Configurations for VLAN IDs 1 to 1005 are written to manually delete the vlan.dat file. Caution You can cause inconsistency in the command reference for this release. 17-4 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 To change the VTP configuration, see Chapter 18, "Configuring VTP." You use the...
... by entering the show vlan privileged EXEC command. Configurations for VLAN IDs 1 to 1005 are written to manually delete the vlan.dat file. Caution You can cause inconsistency in the command reference for this release. 17-4 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 To change the VTP configuration, see Chapter 18, "Configuring VTP." You use the...
Software Configuration Guide
Page 367
... Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 17-5 If a switch has more information on configuring Token Ring VLANs, refer to a VLAN, page 17-11 Token Ring VLANs Although the switch does not support Token Ring connections, a remote device such as a Catalyst 5000 series switch with a number between 1 and 1001. VLAN numbers 1002 through 1005 are reserved for Token Ring and FDDI VLANs. • VLAN configuration...
... Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 17-5 If a switch has more information on configuring Token Ring VLANs, refer to a VLAN, page 17-11 Token Ring VLANs Although the switch does not support Token Ring connections, a remote device such as a Catalyst 5000 series switch with a number between 1 and 1001. VLAN numbers 1002 through 1005 are reserved for Token Ring and FDDI VLANs. • VLAN configuration...
Software Configuration Guide
Page 368
...-6 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 You can configure normal-range VLANs (with a VLAN ID. VLAN Configuration Mode Options You can use this config-vlan mode when creating extended-range VLANs (VLAN IDs greater than 1005). VLAN Configuration in config-vlan Mode To access config-vlan mode, enter the vlan global configuration command with VLAN IDs 1 to 1005) by using these two configuration modes: • VLAN Configuration...
...-6 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 You can configure normal-range VLANs (with a VLAN ID. VLAN Configuration Mode Options You can use this config-vlan mode when creating extended-range VLANs (VLAN IDs greater than 1005). VLAN Configuration in config-vlan Mode To access config-vlan mode, enter the vlan global configuration command with VLAN IDs 1 to 1005) by using these two configuration modes: • VLAN Configuration...
Software Configuration Guide
Page 369
... the copy running a Cisco IOS release earlier than 12.1(9)EA1 and you only configure FDDI and Token Ring media-specific characteristics for VTP global advertisements to other switches. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 17-7 Caution If the VLAN database configuration is used . Default Ethernet VLAN Configuration Table 17-2 shows the default configuration for the first 1005...
... the copy running a Cisco IOS release earlier than 12.1(9)EA1 and you only configure FDDI and Token Ring media-specific characteristics for VTP global advertisements to other switches. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 17-7 Caution If the VLAN database configuration is used . Default Ethernet VLAN Configuration Table 17-2 shows the default configuration for the first 1005...
Software Configuration Guide
Page 371
..., the VLAN configuration is 1 to the word VLAN. This saves the configuration in the switch startup configuration file. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 17-9 do not enter leading zeros. For example, VLAN0004 is to append the vlan-id with leading zeros to 1001; This saves the configuration in the switch startup configuration file. Chapter 17 Configuring VLANs Configuring Normal-Range VLANs Step...
..., the VLAN configuration is 1 to the word VLAN. This saves the configuration in the switch startup configuration file. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 17-9 do not enter leading zeros. For example, VLAN0004 is to append the vlan-id with leading zeros to 1001; This saves the configuration in the switch startup configuration file. Chapter 17 Configuring VLANs Configuring Normal-Range VLANs Step...
Software Configuration Guide
Page 372
... no vlan vlan-id VLAN configuration command. 17-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 This example shows how to use the vlan database privileged EXEC command to the default settings, use the no vlan vlan-id name or no vlan vlan-id end show vlan brief copy running configuration file as well as in VLAN database configuration mode, use VLAN database configuration mode...
... no vlan vlan-id VLAN configuration command. 17-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 This example shows how to use the vlan database privileged EXEC command to the default settings, use the no vlan vlan-id name or no vlan vlan-id end show vlan brief copy running configuration file as well as in VLAN database configuration mode, use VLAN database configuration mode...
Software Configuration Guide
Page 373
... vlan 2 Switch(config-if)# end Switch# End with CNTL/Z. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 17-11 end Return to a VLAN. copy running -config interface interface-id Verify the VLAN membership mode of the display. This example shows how to a VLAN without having VTP globally propagate VLAN configuration information by disabling VTP (VTP transparent mode). Chapter 17 Configuring VLANs Configuring...
... vlan 2 Switch(config-if)# end Switch# End with CNTL/Z. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 17-11 end Return to a VLAN. copy running -config interface interface-id Verify the VLAN membership mode of the display. This example shows how to a VLAN without having VTP globally propagate VLAN configuration information by disabling VTP (VTP transparent mode). Chapter 17 Configuring VLANs Configuring...
Software Configuration Guide
Page 374
... the switch will lose extended-range VLAN configuration if the switch resets. 17-12 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 You always use the vlan vlan-id global configuration command and access config-vlan mode. This section includes this configuration to a greater number of VLANs supported. You cannot add extended-range VLANs in VLAN database configuration mode (accessed by entering the vlan database...
... the switch will lose extended-range VLAN configuration if the switch resets. 17-12 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 You always use the vlan vlan-id global configuration command and access config-vlan mode. This section includes this configuration to a greater number of VLANs supported. You cannot add extended-range VLANs in VLAN database configuration mode (accessed by entering the vlan database...