VLAN Considerations

VLAN Separation

VLAN separation controls whether or not traffic received on the secondary Ethernet interface can be forwarded on the voice VLAN. VLAN separation also controls whether network traffic received on the data VLAN can be forwarded to the telephone. The following system parameters control VLAN separation:

VLANSEP - enables (1) or disables (0) VLAN separation. The default is 1 (on), which allows full separation. When set to 0 (off), VLAN IDs are not used as a criteria for forwarding frames.

L2Q - 802.1Q tagging must be set to 1 (on) or 0 (auto).

L2QVLAN - must be set to the non-zero VLAN ID of the voice VLAN.

PHY2VLAN - must be set to the non-zero VLAN ID of the data VLAN, which cannot be the same as the voice VLAN ID.

PHY2PRIO - the layer 2 priority value to be used for tagged frames received on the secondary Ethernet interface.

Table 9 provides several VLAN separation guidelines.

Table 9: VLAN Separation Rules

If

 

Then

 

 

 

VLANSEP is “0”

OR the telephone is

Frames received on the secondary Ethernet

(Off/Disabled),

not tagging frames,

interface will not be changed before

 

 

forwarding. For example, tagging is not added

 

OR the telephone is

or removed and the VLAN ID and tagged

 

tagging frames with a

frames priority are not changed. The Ethernet

 

VLAN ID equal to

switch forwarding logic determines that frames

 

PHY2VLAN.

received on the Ethernet line interface are

 

 

forwarded to the secondary Ethernet interface

 

 

or to the telephone without regard to specific

 

 

VLAN IDs or the existence of tags.

VLANSEP is “1” (On/Enabled)

All tagged frames received on the secondary

 

 

Ethernet interface are changed before

 

 

forwarding to make the VLAN ID equal to the

PHY2VLAN value and the priority value equal to the PHY2PRIO value.

Untagged frames received on the secondary Ethernet interface are not changed before forwarding.

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Issue 5 April 2010 75

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Avaya 1600 Series, 16-601443 manual Vlan Separation Rules Then