VSC7511 datasheet(121/324 Pages) MICROSEMI

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Functional Descriptions

VMDS-10488 VSC7511 Datasheet Revision 4.2

106

Example: All IPv6 multicast frames in VLAN 12 with MAC 333300112233 are to be forwarded to ports 3,

8, and 9.

This is done by inserting the following entry in the MAC table entry:

VID = 12

MAC = 0x030800112233

ENTRY_TYPE = 3

VALID

DEST_IDX = 0

Port, VLAN, and Domain Filter

The following table lists the registers associated with the ageing filter.

The ANAGEFIL register can be used to only hit specific VLANs or ports when doing certain operations. If

the filter is enabled, it affects the Manual age scan command

(MACACCESS.MAC_TABLE_CMD = AGE).

The GET_NEXT MAC table command. For more information, see CPU Commands, page 104.

When two or more filters are enabled at the same time, for example, port and domain, all conditions must

be fulfilled before the operation (aging, GET_NEXT) is carried out.

3.9.1.7

Shared VLAN Learning

The following table lists the location of the Filter Identifier (FID) used for shared VLAN learning.

In the default configuration, the device is set up to do Independent VLAN Learning (IVL), that is, MAC

addresses are learned separately on each VLAN. The device also supports Shared VLAN Learning

(SVL), where a MAC table entry is shared among a group of VLANs. For shared VLAN learning, a MAC

address and a Filter Identifier (FID) define each MAC table entry. A set of VIDs then map to the FID.

The device supports shared VLAN learning in three ways:

•

Through the IS1 actions FID_SEL and FID_VAL specifying the FID to use.

•

Through the per-VID mapping table FID_MAP.

•

Through the AGENCTRL.FID_MASK, which controls a general mapping between FID and VIDs.

Table 78 •

VID/Port/Domain Filters

Description

Replication

ANAGEFIL

Port, VLAN, and domain filter for limiting the target for aging and

search operations on MAC table.

None

Table 79 •

FID Definition Registers

Description

Replication

IS1_ACTION.FID_SEL

Specifies the use of IS1_ACTION.FID_VAL

for the DMAC lookup, the SMAC lookup, or

for both lookups.

Per IS1 entry

IS1_ACTION.FID_VAL

FID value used when FID_SEL>0. This FID

takes precedence.

Per IS1 entry

ANA::FID_MAP.FID_C_VAL

VID-to-FID mapping table. 64 FIDs are

programmable. FID_C_VAL=0 effectively

disables the mapping implying that

FID_C_VAL=VID.

Per VID

AGENCTRL.FID_MASK

Combines multiple VIDs in the MAC table.

None

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