VSC7440 datasheet(204/444 Pages) MICROSEMI

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Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

187

Figure 41 •

PGID Lookup Decision Forwarding

The following debug events can be used to observe current forwarding:

ANA_AC:PS_STICKY:STICKY.PGID_CPU_MASK_STICKY,

ANA_AC:PS_STICKY:STICKY.NO_L2_L3_FWD_STICKY,

ANA_AC:PS_STICKY:STICKY.IP6_MC_CTRL_FLOOD_STICKY,

ANA_AC:PS_STICKY:STICKY.IP6_MC_DATA_FLOOD_STICKY,

ANA_AC:PS_STICKY:STICKY.IP4_MC_CTRL_FLOOD_STICKY,

ANA_AC:PS_STICKY:STICKY.IP4_MC_DATA_FLOOD_STICKY,

ANA_AC:PS_STICKY:STICKY.L2_MC_FLOOD_STICKY and

ANA_AC:PS_STICKY:STICKY.UC_FLOOD_STICKY

The events can be counted in the port statistics block by setting the corresponding counter

mask:ANA_AC:PS_STICKY_MASK:STICKY_MASK

Flood decison

#Unknown DMAC?

Req.Flood?

false

PGID_ENTRY :=

PGID_TBL(req.dst.fwd_addr.upspn)

false

PGID_ENTRY := PGID_TBL(11

+req.dst.fwd_addr.mc_idx)

req.dst.fwd_type==MC_IDX?

true

req.dst.fwd_type==UPSID_PN?

IsOwnUpsid(req.dst.fwd_addr.upsid)?

true

false

IFH.VSTAX.GEN := FWD_LOGICAL

IFH.VSTAX.DST:UPSID := req.dst.fwd_addr.upsid;

IFH.VSTAX.DST:UPSPN := req.dst.fwd_addr.upspn;

do_stack_upsid_fwd

:= true;

false

No PGID lookup

false

req.l2_uc=1?

# Unicast flood

PGID_ENTRY := PGID_TBL(11)

true

req.ip_mc=1 and req.ip4_avail=1 ?

true

# IP4 MC CTRL flood

PGID_ENTRY := PGID_TBL(14)

req.ip_mc_ctrl=1?

true

# IP4 MC DATA flood

PGID_ENTRY := PGID_TBL(13)

false

req.ip_mc=1 and req.ip6_avail=1 ?

false

# IP6 MC CTRL flood

PGID_ENTRY := PGID_TBL(16)

req.ip_mc_ctrl=1?

true

# IP6 MC DATA flood

PGID_ENTRY := PGID_TBL(15)

false

true

# L2 MC flood

PGID_ENTRY := PGID_TBL(12)

false

true

Done selecting

PGID entry

Select PGID entry

# Redirect via PGID entry?

REQ.COMMON.MASK_MODE == REDIR_PGID?

# PGID index from CLM or VCAP_S2

PGID_ENTRY :=

PGID_TBL(REQ.COMMON.PORT_MASK(7:0))

true

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