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Use the set udld command to enable or disable the UDLD information display on specified ports or globally on all ports.
set udld enable | disable [mod/port]
Syntax Description
enable Keyword to enable the UDLD information display. disable Keyword to disable the UDLD information display. mod/port (Optional) Number of the module and port on the module.
Defaults
The defaults are as follows:
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
This command is not supported by the NAM.
Examples
This example shows how to enable the UDLD message display for port 1 on module 2:
Console> (enable) set udld enable 2/1 UDLD enabled on port 2/1. Warning:UniDirectional Link Detection should be enabled only on ports not connected to hubs, media converters or similar devices. Console> (enable)
This example shows how to disable the UDLD message display for port 1 on module 2:
Console> (enable) set udld disable 2/1 UDLD disabled on port 2/1. Warning:UniDirectional Link Detection should be enabled only on ports not connected to hubs, media converters or similar devices. Console> (enable)
This example shows how to enable the UDLD message display for all ports on all modules:
Console> (enable) set udld enable UDLD enabled globally. Console> (enable)
This example shows how to disable the UDLD message display for all ports on all modules:
Console> (enable) set udld disable UDLD disabled globally Console> (enable)
Related Commands
Use the set udld aggressive-mode command to enable or disable the UDLD aggressive mode on specified ports or globally on all ports.
set udld aggressive-mode enable | disable mod/port
Syntax Description
enable Keyword to enable UDLD aggressive mode. disable Keyword to disable UDLD aggressive mode. mod/port Number of the module and port on the module.
Defaults
The default is aggressive mode is disabled.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
You can use the aggressive mode in cases in which a port that sits on a bidirectional link stops receiving packets from its neighbor. When this happens, if aggressive mode is enabled on the port, UDLD will try to reestablish the connection with the neighbor. If connection is not reestablished after eight failed retries, the port is error disabled.
We recommend that you use this command on point-to-point links between Cisco switches only.
This command is not supported by the NAM.
Examples
This example shows how to enable aggressive mode:
Console> (enable) set udld aggressive-mode enable 2/1 Aggressive UDLD enabled on port 5/13. Warning:Aggressive Mode for UniDirectional Link Detection should be enabled only on ports not connected to hubs, media converters or similar devices.
Console> (enable)
Related Commands
Use the set udld command to set the UDLD message interval timer.
set udld interval interval
Syntax Description
interval Message interval in seconds; valid values are from 7 to 90 seconds.
Defaults
The default is 15 seconds.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
This command is not supported by the NAM.
Examples
This example shows how to set the message interval timer:
Console> (enable) set udld interval 90 UDLD message interval set to 90 seconds Console> (enable)
Related Commands
Use the set vlan command set to group ports into a VLAN or set the private VLAN type.
set vlan {vlan_num}{mod/ports}
Syntax Description
vlan_num Number identifying the VLAN. mod/ports Number of the module and ports on the module belonging to the VLAN. name name (Optional) Keyword and variable to define a text string used as the name of the VLAN; valid values are from 1 to 32 characters. type type (Optional) Keyword and variable to identify the VLAN type. state state (Optional) Keyword and variable to specify whether the state of the VLAN is active or suspended. said said (Optional) Keyword and variable to specify the security association identifier; valid values are from 1 to 4294967294. mtu mtu (Optional) Keyword and variable to specify the maximum transmission unit (packet size, in bytes) that the VLAN can use; valid values are from 576 to 18190. bridge bridge_num (Optional) Keyword and variable to specify the identification number of the bridge; valid values are hexadecimal numbers from 0x1 to 0xF. mode bridge_mode (Optional) Keyword and variable to specify the bridge mode; valid values are srt and srb. stp stp_type (Optional) Keyword and variable to specify the STP type; valid values are ieee, ibm, and auto. translation vlan_num (Optional) Keyword and variable to specify a translational VLAN used to translate FDDI or Token Ring to Ethernet; valid values are from 1 to 1005. aremaxhop hopcount (Optional) Keyword and variable to specify the maximum number of hops for All-Routes Explorer frames; valid values are from 1 to 13. pvlan-type pvlan-type (Optional) Keyword and options to specify the private VLAN type. See the "Usage Guidelines" section for valid values. ring hex_ring_number (Optional) Keyword to specify the VLAN as the primary VLAN in a private VLAN. decring decimal_ring_number (Optional) Keyword and variable to specify the decimal ring number; valid values are from 1 to 4095. parent vlan_num (Optional) Keyword and variable to specify the VLAN number of the parent VLAN; valid values are from 2 to 1005. backupcrf off | on (Optional) Keywords to specify whether the TrCRF is a backup path for traffic. stemaxhop hopcount (Optional) Keyword and variable to specify the maximum number of hops for Spanning Tree Explorer frames; valid values are from 1 to 14. rspan (Optional) Keyword to create a VLAN for remote SPAN.
Defaults
The default values are as follows:
Command Types
Switch command.
Command Modes
Privileged.
This command is not supported by the NAM.
You cannot use the set vlan command until the Catalyst 6000 family switch is either in VTP transparent mode (set vtp mode transparent) or until a VTP domain name has been set (set vtp domain name). To create a private VLAN, UTP mode must be transparent.
You cannot set multiple VLANs for ISL ports using this command. The VLAN name can be from 1 to 32 characters in length. If you are adding a new VLAN, the VLAN number must be within the range 2 to 1001. When you are modifying a VLAN, the valid range for the VLAN number is from 2 to 1005.
If you use the rspan keyword for remote SPAN VLANs, you should not configure an access port (except the remote SPAN destination ports) on these VLANs. Learning is disabled for remote SPAN VLANs.
If you use the rspan keyword for remote SPAN VLANs, only the name name and the state {active | suspend} variables are supported.
The stemaxhop hopcount parameter is valid only when defining or configuring TrCRFs.
The bridge bridge_num, mode bridge_mode, stp stp_type, and translation vlan_num keywords and values are supported only when the Catalyst 6000 family switch is used as a VTP server for Catalyst 5000 family switches in the Token Ring and FDDI networks.
You must configure a private VLAN on the supervisor engine.
Valid values for pvlan-type are:
Only regular VLANs with no access ports assigned to them can be used in private VLANs. Do not use the set vlan command to add ports to a private VLAN; use the set pvlan command to add ports to a private VLAN.
VLANs 1001, 1002, 1003, 1004, and 1005 cannot be used in private VLANs.
VLANs in a suspended state do not pass packets.
Examples
This example shows how to set VLAN 850 to include ports 3 through 7 on module 3:
Console> (enable) set vlan 850 3/4-7VLAN 850 modified.VLAN Mod/Ports---- -----------------------850 3/4-7Console> (enable)
This example shows how to set VLAN 7 as a primary VLAN:
Console> (enable) set vlan 7 pvlan-type primary Console> (enable)
This example shows how to set VLAN 901 as an isolated VLAN:
Console> (enable) set vlan 901 pvlan-type isolated Console> (enable)
This example shows how to set VLAN 903 as a community VLAN:
Console>(enable) set vlan 903 pvlan-type community Console>(enable)
Related Commands
set vlan mapping
show vlan
set pvlan
clear config pvlan
clear pvlan mapping
show pvlan
show pvlan mapping
clear vlan
Use the set vlan mapping command to map 802.1Q VLANs to ISL VLANs.
set vlan mapping dot1q 1q_vlan_num isl isl_vlan_num
Syntax Description
dot1q 1q_vlan_num Keyword and variable to specify the 802.1Q VLAN; valid values are from 1001 to 4095. isl isl_vlan_num Keyword to specify the ISL VLAN; valid values are from 1 to 1024.
Defaults
The default is all switched Ethernet ports and Ethernet repeater ports are in VLAN 1.
Command Types
Switch command.
Command Modes
Privileged.
IEEE 802.1Q VLAN trunks support VLANs 1 through 4095. ISL VLAN trunks support VLANs 1 through 1024 (1005 to 1024 are reserved). The switch automatically maps 802.1Q VLANs 1000 and lower to ISL VLANs with the same number.
Use this feature to map 802.1Q VLANs above 1000 to ISL VLANs.
You can map up to eight VLANs. Only one 802.1Q VLAN can be mapped to an ISL VLAN. For example, if 802.1Q VLAN 800 has been automatically mapped to ISL VLAN 800, do not manually map any other 802.1Q VLANs to ISL VLAN 800.
You cannot overwrite existing 802.1Q VLAN mapping. If the 802.1Q VLAN number already exists, the command is aborted. You must first clear that mapping.
If vlan_num does not exist, then either of the following occurs:
If the table is full, the command is aborted with an error message indicating the table is full.
Examples
This example shows how to map VLAN 850 to ISL VLAN 1022:
Console> (enable) set vlan mapping dot1q 850 isl 1022 Vlan 850 configuration successful Vlan mapping successful Console> (enable)
This example shows the display if you enter a VLAN that does not exist:
Console> (enable) set vlan mapping dot1q 2 isl 1016 Vlan Mapping Set Warning: Vlan 2 Nonexistent Console> (enable)
This example shows the display if you enter an existing mapping:
Console> (enable) set vlan mapping dot1q 3 isl 1022 1022 exists in the mapping table. Please clear the mapping first. Console> (enable)
This example shows the display if the mapping table is full:
Console> (enable) set vlan mapping dot1q 99 isl 1017 Vlan Mapping Table Full. Console> (enable)
Related Commands
Use the set vtp command to set the options for VTP.
set vtp [domain domain_name] [mode {client | server | transparent}] [passwd passwd]
Syntax Description
domain domain_name (Optional) Keywords to define the name that identifies the VLAN management domain. The domain_name can be from 1 to 32 characters in length. mode {client | server | transparent} (Optional) Keywords to specify the VTP mode. passwd passwd (Optional) Keyword and variable to define the VTP password; the VTP password can be from 8 to 64 characters in length. pruning {enable | disable} (Optional) Keywords to enable or disable VTP pruning for the entire management domain. v2 {enable | disable} (Optional) Keywords to enable or disable version 2 mode.
Defaults
The defaults are as follows: server mode, no password, pruning disabled, and v2 disabled.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
This command is not supported by the NAM.
All switches in a VTP domain must run the same version of VTP. VTP version 1 and VTP version 2 do not operate on switches in the same VTP domain.
If all switches in a domain are VTP version 2-capable, you only need to enable VTP version 2 on one switch (using the set vtp v2 enable command); the version number is then propagated to the other version 2-capable switches in the VTP domain.
If the VTP password has already been defined, entering passwd 0 (zero) clears the VTP password.
VTP supports three different modes: server, client, and transparent. If you make a change to the VTP or VLAN configuration on a switch in server mode, that change is propagated to all of the switches in the same VTP domain.
If the receiving switch is in server mode and its revision number is higher than the sending switch, the configuration is not changed. If the revision number is lower, the configuration is duplicated.
VTP can be set to either server or client mode only when dynamic VLAN creation is disabled.
If the receiving switch is in server mode, the configuration is not changed.
If the receiving switch is in client mode, the client switch changes its configuration to duplicate the configuration of the server. Make sure to make all VTP or VLAN configuration changes on a switch in server mode.
If the receiving switch is in transparent mode, the configuration is not changed. Switches in transparent mode do not participate in VTP. If you make VTP or VLAN configuration changes on a switch in transparent mode, the changes are not propagated to the other switches in the network.
The pruning keyword is used to enable or disable VTP pruning for the VTP domain. VTP pruning causes information about each pruning-eligible VLAN to be removed from VTP updates if there are no stations belonging to that VLAN out a particular switch port. Use the set vtp pruneeligible and clear vtp pruneeligible commands to specify which VLANs should or should not be pruned when pruning is enabled for the domain.
To disable VTP, enter the set vtp mode transparent command. This command disables VTP from the domain but does not remove the domain from the switch. Use the clear config all command to remove the domain from the switch.
 |
Caution Be careful when you use the clear config all command. This command clears the entire switch configuration, not just the VTP domain. |
Examples
This example shows how to use the set vtp command:
Console> (enable) set vtp domain Engineering mode client VTP domain Engineering modified Console> (enable)
This example shows what happens if you try to change VTP to server or client mode and dynamic VLAN creation is enabled:
Console> (enable) set vtp mode server Failed to Set VTP to Server. Please disable Dynamic VLAN Creation First. Console> (enable)
Related Commands
show vtp domain
set vlan
clear vlan
show vlan
set vtp pruneeligible
clear vtp pruneeligible
Use the set vtp pruneeligible command to specify which VTP domain VLANs are pruning eligible.
set vtp pruneeligible vlan_range
Syntax Description
vlan_range Range of VLAN numbers; valid values are from 2 to 1000.
Defaults
The default is VLANs 2 through 1000 are eligible for pruning.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
VTP pruning causes information about each pruning-eligible VLAN to be removed from VTP updates if there are no stations belonging to that VLAN out a particular switch port. Use the set vtp command to enable VTP pruning.
By default, VLANs 2 through 1000 are pruning eligible. You do not need to use the set vtp pruneeligible command unless you have previously used the clear vtp pruneeligible command to make some VLANs pruning ineligible. If VLANs have been made pruning ineligible, use the set vtp pruneeligible command to make them pruning eligible again.
Examples
This example shows how to configure pruning eligibility for VLANs 120 and 150:
Console> set vtp pruneeligible 120,150 Vlans 120,150 eligible for pruning on this device. VTP domain nada modified. Console>
In this example, VLANs 200-500 were made pruning ineligible using the clear vtp pruneeligible command. This example shows how to make VLANs 220 through 320 pruning eligible again:
Console> set vtp pruneeligible 220-320 Vlans 2-199,220-320,501-1000 eligible for pruning on this device. VTP domain Company modified. Console>
Related Commands
show vtp domain
set vlan
clear vtp pruneeligible
Posted: Wed Aug 23 13:40:24 PDT 2000
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