KS8995M
Micrel
Start
PTF1=NULL
NO
VLAN ID
VALID?
-Search VLAN table
-Ingress VLAN filtering
-Discard NPVID check
YES
Search complete.
Get PTF1 from
static table
FOUND
Search Static
Table
This search is based on
DA or DA+FID
NOT
FOUND
Search complete.
Get PTF1 from
dynamic table
FOUND
Dynamic
Table
Search
This search is based on
DA+FID
NOT
FOUND
Search complete.
Get PTF1 from
VLAN table
PTF1
Figure 5. DA Look-Up Flowchart鈥揝tage 1
PTF1
Spanning Tree
Process
-Check receiving port鈥檚 receive enable bit
-Check destination port鈥檚 transmit enable bit
-Check whether packets are special (BPDU
or specified)
IGMP Process
-Applied to MAC #1 to #4
-MAC#5 is reserved for microprocessor
-IGMP will be forwarded to port 5
Port Mirror
Process
-RX Mirror
-TX Mirror
-RX or TX Mirror
-RX and TX Mirror
Port VLAN
Membership
Check
PTF2
Figure 6. DA Resolution Flowchart鈥揝tage 2
December 2003
25
M9999-120403