SMSC LAN9311 User Manual

Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface

SMSC LAN9311/LAN9311i

425

Revision 1.4 (08-19-08)

 

This register is used to configure the egress VLAN tagging rules. See 

 for additional details.

Register #:

1C0Ch

Size:

32 bits

31:22

RO

-

21

Insert Tag Port 2
When set, untagged packets will have a tag added that contains the Default 
VLAN ID and Priority of the ingress port.

The un-tag bit in the VLAN table for the default VLAN ID also needs to be 
cleared in order for the tag to be inserted.

This is only used when the Egress Port Type is set as Hybrid.

R/W

0b

20

Change VLAN ID Port 2
When set, regular tagged packets will have their VLAN ID overwritten with 
the Default VLAN ID of the egress port.

The Change Tag bit also needs to be set.

The un-tag bit in the VLAN table for the incoming VLAN ID also needs to be 
cleared, otherwise the tag will be removed instead.

Priority tagged packets will have VLAN ID overwritten with the Default VLAN 
ID of the ingress port independent of this bit.

This is only used when the Egress Port Type is set as Hybrid.

R/W

0b

19

Change Priority Port 2
When set, regular tagged packets will have their Priority overwritten with the 
Default Priority of the egress port. Priority tagged packets will have VLAN ID 
overwritten with the Default VLAN ID of the ingress port.

For regular tagged packets, the Change Tag bit also needs to be set.

The un-tag bit in the VLAN table for the incoming VLAN ID also needs to be 
cleared, otherwise the tag would be removed instead.

This is only used when the Egress Port Type is set as Hybrid.

R/W

0b

18

Change Tag Port 2
When set, allows the Change Tag and Change Priority bits to affect regular 
tagged packets.

This bit has no affect on priority tagged packets.

This is only used when the Egress Port Type is set as Hybrid.

R/W

0b