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Functional Descriptions

VMDS-10488 VSC7511 Datasheet Revision 4.2

108

3.9.2

VLAN Table

The following table lists the registers associated with the VLAN Table.

The analyzer has a VLAN table that contains information about the members of each of the 4096 VLANs.

The following table lists fields for each entry in the VLAN table.

By default, all ports are members of all VLANs. This default can be changed through a CPU command.

The following table lists the set of commands that a CPU can issue to access the VLAN table. The VLAN

table command is written to VLANACCESS.VLAN_TBL_CMD.

Table 81 •

VLAN Table Access

Description

Replication

VLANTIDX

VID to access, and VLAN flags.

None

VLANACCESS

VLAN port mask for VID and command for access.

None

Table 82 •

Fields in the VLAN Table

Field

Bits

Description

VLAN_PORT_MASK

One bit for each port. Set if port is member of VLAN.

The CPU port is always a member of all VLANs.

VLAN_MIRROR

Mirror frames received in the VLAN. See Mirroring,

page 117.

VLAN_SRC_CHK

VLAN ingress filtering. If set, frames classified to this VLAN

are dropped if PPORT is not member of the VLAN.

VLAN_LEARN_DISABLED 1

Disable learning in the VLAN.

VLAN_PRIV_VLAN

Set VLAN to private.

Table 83 •

VLAN Table Commands

Command

Purpose

Use

INIT

Initialize the table

Issue command. When VLAN_TBL_CMD changes to

IDLE, initialization has completed and all ports are

member of all VLANs. All flags are cleared.

READ

Read VLAN table entry

for specific VID.

Configure the VLAN to read from in

VLANTIDX.V_INDEX.

When VLAN_TBL_CMD changes to IDLE,

VLANACCESS, and VLANTIDX contain the information

read.

WRITE

Write VLAN table entry

for specific VID.

Configure the VLAN to write to in VLANTIDX.V_INDEX.

Configure the content of the VLAN record in

VLANACCESS.VLAN_PORT_MASK

VLANTIDX.VLAN_MIRROR

VLANTIDX.VLAN_SRC_CHK

VLANTIDX.VLAN_LEARN_DISABLED

VLANTIDX.VLAN_PRIV_VLAN

IDLE

Indicate that VLAN table

is ready for new

command.

No preload required.

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