KSZ8842-16MBL-EVAL MICREL [Micrel Semiconductor], KSZ8842-16MBL-EVAL Datasheet - Page 34

• Manufacturer Part Number: KSZ8842-16MBL-EVAL
• Description: 2-Port Ethernet Switch with Non-PCI Interface
• Manufacturer: MICREL [Micrel Semiconductor]

The KSZ8842M will not forward the following packets:
Micrel, Inc.
October 2007
1. Error packets.
2. 802.3x pause frames.
3. "Local" packets.
These include framing errors, Frame Check Sequence (FCS) errors, alignment errors, and illegal size packet
errors.
The KSZ8842M intercepts these packets and performs the flow control.
Based on destination address (DA) lookup. If the destination port from the lookup table matches the port from
which the packet originated, the packet is defined as "local."
Figure 11. Destination Address Resolution Flow Chart in Stage Two
Spanning Tree
IGMP Process
Membership
Port Mirror
Port VLAN
Process
Process
Check
PTF1
PTF2
- Check receiving port's receive enable bit
- Check destination port's transmit enable bit
- Check whether packets are special (BPDU)
or specified
- Applied to MAC #1 and MAC #2
- IGMP will be forwarded to the host port
- RX Mirror
- TX Mirror
- RX or TX Mirror
- RX and TX Mirror
34
KSZ8842-16/32 MQL/MVL/MVLI/MBL
M9999-102207-1.9