Cisco Catalyst 3560-X Command Reference Manual page 931
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Also See for Catalyst 3560-X:
- Software configuration manual (1538 pages) ,
- Command reference manual (1244 pages) ,
- Manual (276 pages)
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Chapter 2 Catalyst 3750-X and 3560-X Cisco IOS Commands
Defaults
Command Modes
Command History
Usage Guidelines
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remove removes the defined list of VLANs from those currently set instead of replacing the list.
Valid IDs are from 1 to 1005; extended-range VLAN IDs are valid in some cases.
You can remove extended-range VLANs from the allowed VLAN list, but you cannot
Note
remove them from the pruning-eligible list.
Separate nonconsecutive VLAN IDs with a comma; use a hyphen to designate a range of IDs.
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except lists the VLANs that should be calculated by inverting the defined list of VLANs. (VLANs
are added except the ones specified.) Valid IDs are from 1 to 1005. Separate nonconsecutive VLAN
IDs with a comma; use a hyphen to designate a range of IDs.
vlan-atom is either a single VLAN number from 1 to 4094 or a continuous range of VLANs
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described by two VLAN numbers, the lesser one first, separated by a hyphen.
The default encapsulation is negotiate.
VLAN 1 is the default native VLAN ID on the port.
The default for all VLAN lists is to include all VLANs.
Interface configuration
Release
12.2(53)SE2
Encapsulation:
The switchport trunk encapsulation command is supported only for platforms and interface
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hardware that can support both ISL and IEEE 802.1Q formats.
You cannot configure one end of the trunk as an IEEE 802.1Q trunk and the other end as an ISL or
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nontrunk port. However, you can configure one port as an ISL trunk and a different port on the same
switch as an IEEE 802.1Q trunk.
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If you enter the negotiate keywords and DTP negotiation does not resolve the encapsulation format,
ISL is the selected format. The no form of the command resets the trunk encapsulation format to the
default.
The no form of the encapsulation command resets the encapsulation format to the default.
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Native VLANs:
All untagged traffic received on an IEEE 802.1Q trunk port is forwarded with the native VLAN
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configured for the port.
If a packet has a VLAN ID that is the same as the sending-port native VLAN ID, the packet is sent
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without a tag; otherwise, the switch sends the packet with a tag.
The no form of the native vlan command resets the native mode VLAN to the appropriate default
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VLAN for the device.
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Modification
This command was introduced.
Catalyst 3750-X and 3560-X Switch Command Reference
switchport trunk
2-899
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