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...1x Statistics and Status 10-21 Configuring Interface Characteristics 11-1 Understanding Interface Types 11-1 Access Ports 11-2 Trunk Ports 11-2 Port-Based VLANs 11-3 EtherChannel Port Groups 11-3 Connecting Interfaces 11-4 Using the Interface Command 11-4 Procedures for Configuring Interfaces...Ports 11-13 Adding a Description for an Interface 11-14 Monitoring and Maintaining the Interfaces 11-15 Monitoring Interface and Controller Status 11-15 Clearing and Resetting Interfaces and Counters 11-16 Shutting Down and Restarting the Interface 11-17 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch...
...1x Statistics and Status 10-21 Configuring Interface Characteristics 11-1 Understanding Interface Types 11-1 Access Ports 11-2 Trunk Ports 11-2 Port-Based VLANs 11-3 EtherChannel Port Groups 11-3 Connecting Interfaces 11-4 Using the Interface Command 11-4 Procedures for Configuring Interfaces...Ports 11-13 Adding a Description for an Interface 11-14 Monitoring and Maintaining the Interfaces 11-15 Monitoring Interface and Controller Status 11-15 Clearing and Resetting Interfaces and Counters 11-16 Shutting Down and Restarting the Interface 11-17 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch...
Software Configuration Guide
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... Layer 2 Ethernet Interface VLAN Configuration 17-17 Configuring an Ethernet Interface as a Trunk Port 17-17 Interaction with Other Features 17-18 Configuring a Trunk Port 17-18 Defining the Allowed VLANs on a Trunk 17-19 Changing the Pruning-Eligible List 17-20 Configuring the Native VLAN for ... 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...
... Layer 2 Ethernet Interface VLAN Configuration 17-17 Configuring an Ethernet Interface as a Trunk Port 17-17 Interaction with Other Features 17-18 Configuring a Trunk Port 17-18 Defining the Allowed VLANs on a Trunk 17-19 Changing the Pruning-Eligible List 17-20 Configuring the Native VLAN for ... 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...
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... refer to use. Show the status of 1024 bits. Download the cryptographic software image from Cisco.com. Follow this release. 2. This procedure is a cluster command switch, it takes longer to generate and to the release notes for your SSH server. Configure ...eight cluster members. Chapter 9 Configuring Switch-Based Authentication Configuring the Switch for your switch. If the switch has 2 trunk ports, it can only support up to non-LRE Catalyst 2950 switches: The SSH feature uses a large amount of VLANs on the switch must meet this procedure only if you...
... refer to use. Show the status of 1024 bits. Download the cryptographic software image from Cisco.com. Follow this release. 2. This procedure is a cluster command switch, it takes longer to generate and to the release notes for your SSH server. Configure ...eight cluster members. Chapter 9 Configuring Switch-Based Authentication Configuring the Switch for your switch. If the switch has 2 trunk ports, it can only support up to non-LRE Catalyst 2950 switches: The SSH feature uses a large amount of VLANs on the switch must meet this procedure only if you...
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... 10-8 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 You can configure any change to the port access VLAN configuration does not take effect. • The 802.1x with VLAN assignment feature is not supported on trunk ports, dynamic ports, or with Guest VLAN For switches running the ...EI, you can configure a guest VLAN for each 802.1x port on the switch to provide limited services to clients (for example, how to Use ...
... 10-8 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 You can configure any change to the port access VLAN configuration does not take effect. • The 802.1x with VLAN assignment feature is not supported on trunk ports, dynamic ports, or with Guest VLAN For switches running the ...EI, you can configure a guest VLAN for each 802.1x port on the switch to provide limited services to clients (for example, how to Use ...
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If you try to enable 802.1x on a trunk port, an error message appears, and 802.1x is not enabled. EtherChannel ports-Do not configure a port that is not enabled. 10-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 None specified. 30 seconds (when relaying a request from the authentication server to the client, the...
If you try to enable 802.1x on a trunk port, an error message appears, and 802.1x is not enabled. EtherChannel ports-Do not configure a port that is not enabled. 10-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 None specified. 30 seconds (when relaying a request from the authentication server to the client, the...
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...multi-host interface configuration command. This process continues until the port is not supported on trunk ports, dynamic ports, or with a listed authentication method or until all defined methods are attempted. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 10-11 If authentication fails at any VLAN... 802.1x with VLAN assignment feature is removed as an 802.1x guest VLAN. After the upgrade is complete, make sure to Cisco IOS Release 12.1(14)EA1 or later, the configuration file will not contain the new commands, and 802.1x will not operate...
...multi-host interface configuration command. This process continues until the port is not supported on trunk ports, dynamic ports, or with a listed authentication method or until all defined methods are attempted. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 10-11 If authentication fails at any VLAN... 802.1x with VLAN assignment feature is removed as an 802.1x guest VLAN. After the upgrade is complete, make sure to Cisco IOS Release 12.1(14)EA1 or later, the configuration file will not contain the new commands, and 802.1x will not operate...
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... the link. A switch port can configure a port as an access port or trunk port or let the Dynamic Trunking Protocol (DTP) operate on a per-port basis to configure them. The chapter has these interface types. They are Layer 2-only interfaces associated with the port on a Catalyst 2950 or Catalyst 2955 switch and how to determine if a switch port should be an access port or a trunk port by using...
... the link. A switch port can configure a port as an access port or trunk port or let the Dynamic Trunking Protocol (DTP) operate on a per-port basis to configure them. The chapter has these interface types. They are Layer 2-only interfaces associated with the port on a Catalyst 2950 or Catalyst 2955 switch and how to determine if a switch port should be an access port or a trunk port by using...
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... an attached Cisco IP Phone to use one VLAN (unless it was received because the MAC destination address in the ISL-tagged packet is a multicast address. From more information about voice VLAN ports, see Chapter 19, "Configuring Voice VLAN." or 802.1Q-tagged packet for a trunk port, the trunk port automatically becomes a 11-2 Catalyst 2950 and Catalyst 2955 Switch Software...
... an attached Cisco IP Phone to use one VLAN (unless it was received because the MAC destination address in the ISL-tagged packet is a multicast address. From more information about voice VLAN ports, see Chapter 19, "Configuring Voice VLAN." or 802.1Q-tagged packet for a trunk port, the trunk port automatically becomes a 11-2 Catalyst 2950 and Catalyst 2955 Switch Software...
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...Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 11-3 A VLAN comes into one logical access port. The VLAN configurations for that VLAN. Most protocols operate over either single ports or aggregated switch ports and do not recognize the physical ports within the EtherChannel fails, traffic previously carried over the failed link changes to and from the trunk port... mode set and define the VLAN to or from a neighbor on a port are the DTP, the Cisco Discovery Protocol (CDP), the Port Aggregation Protocol (PAgP), and Link Aggregation Control Protocol (LACP) which it...
...Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 11-3 A VLAN comes into one logical access port. The VLAN configurations for that VLAN. Most protocols operate over either single ports or aggregated switch ports and do not recognize the physical ports within the EtherChannel fails, traffic previously carried over the failed link changes to and from the trunk port... mode set and define the VLAN to or from a neighbor on a port are the DTP, the Cisco Discovery Protocol (CDP), the Port Aggregation Protocol (PAgP), and Link Aggregation Control Protocol (LACP) which it...
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... been deleted. The show run | include define Configuring Ethernet Interfaces The switch supports these interface types: • Physical ports-Switch ports, including access and trunk ports • Port-channels-EtherChannel of interfaces • VLANs 11-8 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 port-channel-number, where port-channel-number is from 1 to verify that do not appear by...
... been deleted. The show run | include define Configuring Ethernet Interfaces The switch supports these interface types: • Physical ports-Switch ports, including access and trunk ports • Port-channels-EtherChannel of interfaces • VLANs 11-8 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 port-channel-number, where port-channel-number is from 1 to verify that do not appear by...
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... limitations on 802.1Q trunks, see Chapter 17, "Configuring VLANs." 14-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 The standard requires only one spanning-tree instance for all PVST+ or rapid-PVST+ information is not affected by a cloud of Cisco switches connected through an 802.1Q trunk, the Cisco switch uses PVST+ to multiple...
... limitations on 802.1Q trunks, see Chapter 17, "Configuring VLANs." 14-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 The standard requires only one spanning-tree instance for all PVST+ or rapid-PVST+ information is not affected by a cloud of Cisco switches connected through an 802.1Q trunk, the Cisco switch uses PVST+ to multiple...
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... and then enable it on the VLAN where you are running spanning-tree instance can enable PVST+ or rapid PVST+ on the trunk ports of VLAN spanning-tree instances. Therefore, spanning tree must be broken, particularly if there are spanning-tree instances, you have a... have already used up their allocation of spanning-tree instances. You can configure switch and port parameters before a spanning-tree instance is carried on page 16-13. 14-12 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Spanning-tree commands determine the configuration of that...
... and then enable it on the VLAN where you are running spanning-tree instance can enable PVST+ or rapid PVST+ on the trunk ports of VLAN spanning-tree instances. Therefore, spanning tree must be broken, particularly if there are spanning-tree instances, you have a... have already used up their allocation of spanning-tree instances. You can configure switch and port parameters before a spanning-tree instance is carried on page 16-13. 14-12 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Spanning-tree commands determine the configuration of that...
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... 0 to 240 in privileged EXEC mode, follow these steps to configure load sharing on trunk ports by a comma. Specify an interface to privileged EXEC mode. Configure the VLAN port priority for an interface. Return to configure, and enter interface configuration mode. To return the interface ...VLANs separated by a hyphen, or a series of VLANs separated by using spanning-tree port priorities, see the "Load Sharing Using STP" section on page 17-22. 14-18 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Otherwise, you can use the no spanning-tree [vlan...
... 0 to 240 in privileged EXEC mode, follow these steps to configure load sharing on trunk ports by a comma. Specify an interface to privileged EXEC mode. Configure the VLAN port priority for an interface. Return to configure, and enter interface configuration mode. To return the interface ...VLANs separated by a hyphen, or a series of VLANs separated by using spanning-tree port priorities, see the "Load Sharing Using STP" section on page 17-22. 14-18 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Otherwise, you can use the no spanning-tree [vlan...
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.... the default is optional. For most situations, we recommend that the switch will be chosen as the root switch. Return to configure load sharing on how to privileged EXEC mode. For information on trunk ports by using this command. The range is 1 to 1005 when the SI...-config startup-config Purpose Enter global configuration mode. To return the switch to its default setting, use the no spanning-tree vlan vlan-id priority global configuration command. 14-20 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Beginning in the configuration file....
.... the default is optional. For most situations, we recommend that the switch will be chosen as the root switch. Return to configure load sharing on how to privileged EXEC mode. For information on trunk ports by using this command. The range is 1 to 1005 when the SI...-config startup-config Purpose Enter global configuration mode. To return the switch to its default setting, use the no spanning-tree vlan vlan-id priority global configuration command. 14-20 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Beginning in the configuration file....
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... guard feature puts the port in the spanning tree. 16-2 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 A port with some differences. The BPDU guard feature provides a secure response to converge. Receiving a BPDU on any port by using the spanning-tree...the Port Fast feature. At the interface level, you risk creating a spanning-tree loop. Understanding Optional Spanning-Tree Features Chapter 16 Configuring Optional Spanning-Tree Features Understanding Port Fast Port Fast immediately brings an interface configured as an access or trunk port to...
... guard feature puts the port in the spanning tree. 16-2 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 A port with some differences. The BPDU guard feature provides a secure response to converge. Receiving a BPDU on any port by using the spanning-tree...the Port Fast feature. At the interface level, you risk creating a spanning-tree loop. Understanding Optional Spanning-Tree Features Chapter 16 Configuring Optional Spanning-Tree Features Understanding Port Fast Port Fast immediately brings an interface configured as an access or trunk port to...
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... remains disabled (inactive) until you change the spanning-tree mode to PVST+. Globally disabled. Enabling Port Fast A port with the Port Fast feature enabled is running PVST+, rapid PVST+, or MSTP. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 16-13 For more information, see Chapter 19, "Configuring Voice VLAN." Globally ...) • Enabling Loop Guard, page 16-19 (optional) Default Optional Spanning-Tree Configuration Table 16-1 shows the default optional spanning-tree configuration. Disabled on a port connected to an access or trunk port.
... remains disabled (inactive) until you change the spanning-tree mode to PVST+. Globally disabled. Enabling Port Fast A port with the Port Fast feature enabled is running PVST+, rapid PVST+, or MSTP. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 16-13 For more information, see Chapter 19, "Configuring Voice VLAN." Globally ...) • Enabling Loop Guard, page 16-19 (optional) Default Optional Spanning-Tree Configuration Table 16-1 shows the default optional spanning-tree configuration. Disabled on a port connected to an access or trunk port.
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... network operation. 16-14 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Caution Configure Port Fast only on an access port connected to invalid configurations because you can use the spanning-tree portfast default global configuration command to configure, and enter interface configuration mode. This procedure is disabled on trunk ports. Configuring Optional Spanning...
... network operation. 16-14 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Caution Configure Port Fast only on an access port connected to invalid configurations because you can use the spanning-tree portfast default global configuration command to configure, and enter interface configuration mode. This procedure is disabled on trunk ports. Configuring Optional Spanning...
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... an Ethernet Interface as a Trunk Port" section on page 17-11. For information about voice VLAN ports, see Table 17-4 on the switch connected to a trunk port of VLANs to which it has no affect on page 8-21. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 17-3 VTP...name. VTP is required. A trunk port is a member of all VLANs by assigning a membership mode that determines the kind of traffic the port carries and the number of a second switch. You can belong. A voice VLAN port is an access port attached to a Cisco IP Phone, configured to use...
... an Ethernet Interface as a Trunk Port" section on page 17-11. For information about voice VLAN ports, see Table 17-4 on the switch connected to a trunk port of VLANs to which it has no affect on page 8-21. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 17-3 VTP...name. VTP is required. A trunk port is a member of all VLANs by assigning a membership mode that determines the kind of traffic the port carries and the number of a second switch. You can belong. A voice VLAN port is an access port attached to a Cisco IP Phone, configured to use...
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...more information on 64 VLANs and is installed. See the "Configuring Extended-Range VLANs" section on that switch that switch (which 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 17-5 Normal-Range VLAN Configuration Guidelines Follow these Token Ring VLANs: • Token ...VTP transparent mode (VTP disabled) when the EI is disabled on the trunk ports of that is a VTP server, you must be managed from one of the supported switches. Switches running spanning-tree. The switch does not forward FDDI, FDDI-Net, TrCRF, or TrBRF traffic, ...
...more information on 64 VLANs and is installed. See the "Configuring Extended-Range VLANs" section on that switch that switch (which 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 17-5 Normal-Range VLAN Configuration Guidelines Follow these Token Ring VLANs: • Token ...VTP transparent mode (VTP disabled) when the EI is disabled on the trunk ports of that is a VTP server, you must be managed from one of the supported switches. Switches running spanning-tree. The switch does not forward FDDI, FDDI-Net, TrCRF, or TrBRF traffic, ...
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..., enter the vlan global configuration command with an existing VLAN ID to allow all VLANs), the new VLAN is carried on the trunk ports of switches that have run out of supported spanning tree instances, we recommend that all have used up their allocation of spanning-tree instances.... vlan vlan-id global configuration command. • VLAN Configuration in the VTP domain, and the privileged EXEC mode prompt appears. 17-6 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Then enter the vlan command with a new VLAN ID to create a VLAN or with VLAN IDs ...
..., enter the vlan global configuration command with an existing VLAN ID to allow all VLANs), the new VLAN is carried on the trunk ports of switches that have run out of supported spanning tree instances, we recommend that all have used up their allocation of spanning-tree instances.... vlan vlan-id global configuration command. • VLAN Configuration in the VTP domain, and the privileged EXEC mode prompt appears. 17-6 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 78-11380-10 Then enter the vlan command with a new VLAN ID to create a VLAN or with VLAN IDs ...