Private VLAN

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Port > Configure > Private VLAN

The following information appears:

If you set the port mode to Host(2) and cpvlanPrivatePortSecondaryVlan is instantiated, then the following object appears:

If you set the port mode to promiscuous(3), then the following three objects appear:

If you set the port mode to either secondaryTrunk(4) or promiscuousTrunk(5), then the following seven objects appear:


Port Mode (cpvlanPortMode)

Indicates which mode is currently configured for this port. There are 5 possible values:

After selecting a mode from the list, click Set to apply that mode to this port.


Secondary VLAN ID (cpvlanPrivatePortSecondaryVlan)

VLAN ID of the secondary VLAN.

A private port:

Note that a port can join a secondary VLAN only after this secondary VLAN has been associated with a primary VLAN (in other words, when cpvlanVlanAssociatedPrimaryVlan has a nonzero value).


Multi Primary Vlan (cpvlanPromPortMultiPrimaryVlan)

Indicates whether all the bits set as secondary VLANs in the corresponding remapping objects (for example, cpvlanPromPortSecondaryRemap) can belong to multiple primary VLANs. If this object is set to false(2), the value of cpvlanVlanAssociatedPrimaryVlan for the secondary VLANs with their bits set to "1" in those remapping objects must be the same.

Note: A promiscuous port can remap a secondary VLAN to its associated primary VLAN for outgoing traffic on the fly, as defined for the Private VLAN feature.


Secondary VLAN Remap Details (0-1023) (cpvlanPromPortSecondaryRemap2k)

A string of octets containing one bit per VLAN for VLANs with VlanIndexOrZero values of 1024 through 2047 in the management domain on this port. The first octet corresponds to VLANs with VlanIndexOrZero values of 1024 through 1031; the second octet to VLANs with VlanIndexOrZero values of 1032 through 1039; and so on. The most significant bit of each octet is indicated by the lowest value of VlanIndexOrZero in that octet.

A bit can only be set to "1" when it corresponds to a Private VLAN isolated, community, or two-way community VLAN which has already been associated with a primary VLAN. Setting this bit to "1" results in one of the following:

If the length of this string is less than 128 octets, any missing octets are assumed to contain the value zero. An NMS may omit these octets from the end of this string in order to reduce the size of Set PDUs. An NMS may also omit trailing octets containing the value zero to reduce the size of GetResponse PDUs.

Note: This object is only instantiated on devices which support values ranging from the value of VlanIndexOrZero to 4095.


Two Way Remap (cpvlanPromPortTwoWayRemapCapable)

Indicates whether a port is capable of  remapping primary VLANs to the two-way community VLANs associated with them for the Private VLAN feature. When this object is set to false(2), a promiscuous port can perform only one-way remappings of secondary VLANs to their associated primary VLANs. When this object is set to true(1), a promiscuous port can also perform remappings of primary VLANs to the two-way community VLANs associated with them.


Dynamic State (cpvlanTrunkPortDynamicState)

For private VLAN trunk ports, this object indicates the trunking behavior configured for a port. There are two possible values:


Encapsulation Type (cpvlanTrunkPortEncapType)

VLAN encapsulation type used by this private VLAN trunk port. There are three possible values:


Native Vlan (cpvlanTrunkPortNativeVlan)

VlanIndex value of the VLAN which is represented by native frames on this private VLAN trunk port. For ports that need to drop untagged frames or do not support the sending and receiving of native frames, the value of this object should be set to zero.


Secondary Vlans (cpvlanTrunkPortSecondaryVlans(1-4)k)

An octet string containing one bit per VLAN for VLANs with values ranging from 0 to1023 in the management domain on this port. Note the following:


Normal Vlans (cpvlanTrunkPortNormalVlans(1-4)k)

An octet string containing one bit per VLAN for VLANs with values ranging from 0 to1023 in the management domain on this port. Note the following:


Dynamic Status (cpvlanTrunkPortDynamicStatus)

Current dynamic trunking status of the specified private VLAN port. There are two possible values:


Encapsulation Operational Type (cpvlanTrunkPortEncapOperType)

The VLAN encapsulation type in use by this private VLAN trunk port. There are three possible values: