VSC7440 datasheet(286/444 Pages) MICROSEMI

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Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

269

3.26.11 Layer 3 Routing

The following registers are associated with routing (Layer 3, or L3). They are used when the analyzer

signals routing by setting IFH.FWD.DST_MODE = L3UC_ROUTING or L3MC_ROUTING.

The analyzer can also signal routing using IFH.DST.ENCAP.RT_FWD = 1. In this case, the MAC

addresses and VMIDs are controlled directly by the analyzer, and the registers in the rewriter are not

used.

The IFH.DST.L3_[MC|UC]ROUTING.ERLEG fields are used to select the VID of routed frames using the

Egress Mapped VLAN (VMID) configuration registers listed in the following table.

3.26.12 Mirror Frames

The device offers three mirror probe sets that can be individually configured. The following table lists the

rewriter configuration registers associated with mirroring.

Table 188 •

Routing SMAC Configuration Registers

Description

Replication

RLEG_CFG_0.

RLEG_MAC_LSB

Router Leg SMAC address used for IP routing (least significant bits).

Must be set identical to ANA_L3::RLEG_CFG_0.RLEG_MAC_LSB.

None

RLEG_CFG_1.

RLEG_MAC_TYPE_SEL

Configures how Router Leg MAC addresses are specified.

Must be set identical to ANA_L3::RLEG_CFG_1.RLEG_MAC_TYPE_SEL.

0: RLEG_MAC:= RLEG_MAC_MSB(23:0) and (RLEG_MAC_LSB(23:0) +

VMID(7:0) mod 224)

1: RLEG_MAC:= RLEG_MAC_MSB(23:0) and (RLEG_MAC_LSB(23:0) +

VID(11:0) mod 224

Others: RLEG_MAC:= RLEG_MAC_MSB(23:0) and

RLEG_MAC_LSB(23:0) number of common address for all VLANs.

None

RLEG_CFG_1.

RLEG_MAC_MSB

MSB part of SMAC used for IP routing.

Must be set identical to ANA_L3::RLEG_CFG_1.RLEG_MAC_MSB.

None

Table 189 •

L3 Routing Egress Mapping VLAN (EVMID)

Description

Replication

RLEG_CTRL.RLEG_EVID

VID value assigned to this router leg.

RLEG_CTRL.

RLEG_VSTAX2_WAS_TAGGED

Controls the value of IFH.VSTAX.TAG.WAS_TAGGED field in the

stack header for frames that are L3 forwarded to a stack port.

Table 190 •

Mirror Probe Configuration Registers

Description

Replication

MIRROR_PROBE_CFG.

MIRROR_TX_PORT

The Tx port for each mirror probe (from where rewrite configuration was

taken).

Mirror probes

MIRROR_PROBE_CFG.

REMOTE_ENCAP_ID

Selects encapsulation ID to use for remote mirror frames.

Mirror probes

MIRROR_PROBE_CFG.

REMOTE_MIRROR_CFG

Enables encapsulation of mirrored frames. One or two Q-tags (Q-in-Q)

or the encapsulation table can be used.

In tag mode, the VLAN tags are added after the outer SMAC. In other

words, if an MPLS link layer is added to the frame, the tags are added

after the LL-SMAC.

In encapsulation mode, an entry in the ENCAP table is used for

encapsulation. This overrides any encapsulation selected by ES0 for

the frame.

VSC7440 Datasheet(PDF) 286 Page - Microsemi Corporation

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