See the “Assigning Static-Access Ports to a VLAN” section on page 14-10. Configure the port as eligible for dynamic VLAN membership. Switch# terminalediting Step 1 Catalyst 2960-X Switch System Management Configuration Guide, Cisco IOS Release 15.0(2)EX OL-29052-01 7 Using the Command-Line … Makes the interface able to convert the link to a trunk link. The configurations of VLAN IDs 1 to 1005 are always saved in the VLAN database (vlan.dat file). Ethernet trunk interfaces support different trunking modes (see Table 14-4). A VLAN is a switched network that is logically segmented by function, project team, or application, without regard to the physical locations of the users. See the “Normal-Range VLAN Configuration Guidelines” section on page 14-6 for more information about the number of spanning-tree instances and the number of VLANs. Verify your entries in the VMPS Domain Server field of the display. Otherwise, if the switch resets, it will default to VTP server mode, and the extended-range VLAN IDs will not be saved. Any hosts that come online through the port are checked again through the VQP with the VMPS before the port is assigned to a VLAN. The results of these commands are written to the running-configuration file, and you can display the file by entering the show running-config privileged EXEC command. When the trunk links come up, VTP passes the VTP and VLAN information to Switch B. Verify that Switch B has learned the VLAN configuration. If no name is entered for the VLAN, the default is to append the vlan-id with leading zeros to the word VLAN. Verify the VTP configuration on both Switch A and Switch B. Switch# terminalediting Step 1 Catalyst 2960-X Switch System Management Configuration Guide, Cisco IOS Release 15.0(2)EX OL-29052-01 7 Using the Command-Line … To return an interface to its default switchport mode (dynamic auto), use the no switchport mode interface configuration command. In open mode, the server simply denies the host access to the port. Assign the port to a VLAN. With VTP version 1 or 2, extended-range VLAN configurations are not stored in the VLAN database, but because VTP mode is transparent, they are stored in the switch running configuration file, and you can save the configuration in the startup configuration file by using the copy running-config startup-config privileged EXEC command. Dynamic-access ports can be used for direct host connections, or they can connect to a network. In VTP version 1 or 2, if you enter an extended-range VLAN ID when the switch is not in VTP transparent mode, an error message is generated when you exit VLAN configuration mode, and the extended-range VLAN is not created. You can enter the copy running-config startup-config privileged EXEC command to save the configuration in the startup configuration file. Otherwise, the switch cannot receive any VTP advertisements. This example shows how to remove VLAN 2 from the allowed VLAN list on a port: The pruning-eligible list applies only to trunk ports. VLAN IDs 1002 through 1005 are reserved for Token Ring and FDDI VLANs. Beginning in privileged EXEC mode, follow these steps to remove VLANs from the pruning-eligible list on a trunk port: Select the trunk port for which VLANs should be pruned, and enter interface configuration mode. Table 14-6 shows the default VMPS and dynamic-access port configuration on client switches. (See the “VTP Pruning” section on page 15-6). 2. (SW – abbreviation SWitch). The trunk port with the lower priority (higher values) for the same VLAN remains in a blocking state for that VLAN. VTP version 3 supports the entire VLAN range (VLANs 1 to 4094). You can set an interface as trunking or nontrunking or to negotiate trunking with the neighboring interface. Each VLAN is considered a logical network, and packets destined for stations that do not belong to the VLAN must be forwarded through a router or a switch supporting fallback bridging, as shown in Figure 14-1. All rights reserved. These sections contain normal-range VLAN configuration information: Although the switch does not support Token Ring connections, a remote device such as a Catalyst 5000 series switch with Token Ring connections could be managed from one of the supported switches. Verify the dynamic VLAN reconfirmation status. (Optional) Save your entries in the configuration file. Define the interface to set the STP port priority, and enter interface configuration mode. Note You must have IP connectivity to the VMPS for dynamic-access ports to work. The switch supports VLANs in VTP client, server, and transparent modes. To reset all trunking characteristics of a trunking interface to the defaults, use the no switchport trunk interface configuration command. For load sharing using STP port priorities, both load-sharing links must be connected to the same switch. To autonegotiate trunking, the interfaces must be in the same VTP domain. These sections contain extended-range VLAN configuration information: See Table 14-2 on page 14-7 for the default configuration for Ethernet VLANs. The default switchport mode for all Ethernet interfaces is dynamic auto .
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