Highlights and Features
Management Capabilities
• The KSZ8794CNX includes all the functi ons of a
10/100Base-T/ T X switch system which combines a
switch engine, frame buffer management, address look-
up table, queue management, MIB counters, media
access controllers (MAC) and PHY transcei vers
• Non-blocking store-and-for war d switch fabric assures
fast packet delivery by utilizing 1024 entries forwarding
table
• Port mirroring/monitoring/snif f i ng: ingress and/or egress
traffic to any port
• MIB counters for f ul l y compliant statistic s gat hering 36
counters per port
• Support hardware for port-based flush and freeze
command in MIB counter.
• Multiple loopback of remote, PHY and MAC modes
support for the diagnostics
• Rapid Spanning Tree Support (RSTP) for topol ogy
management and rin g/linear recovery
Robust PHY Ports
• Four Integrated IEEE 802.3 / 802.3u co m pl i ant E thernet
transceivers support ing 10Base-T and 1 00Base-TX
• IEEE 802.1az EEE supported
• On-Chip terminat i on resistors and intern al bi asing for
differential pairs to reduce power
• HP Auto MDI/MDI-X™ crossover support eliminating the
need to differentiat e between straight or crossover
cables in applications
MAC and GMAC Ports
• Four internal media access control (MAC 1 to MAC3)
units and one internal gi gabit media acc ess control
(GMAC4) unit
• RGMII, MII or RMII interfaces support for the port 4
GMAC4 with uplink
• 2KByte Jumbo packet support
• Tail tagging mode (one byte added befo re FCS) support
on port 4 to inform the processor which ingress port
receives the packet and its priority
• Supports Reduce d M edia Independent Interface (RMII)
with 50 MHz reference clock output
• Supports Media I ndependent Interface (MI I) in either
PHY mode or MAC m ode on port 4
• Micrel LinkMD® cable diagnostic capabilities for
determining cabl e opens, shorts, and l ength
Advanced Switch Capabilities
• Non-blocking store-and-for war d switch fabric assures
fast packet delivery by utilizing 1024 entry forwarding
table
• 64kb frame buffer RAM
• IEEE 802.1q VLAN support for up to 128 active VLA N
groups (full-range 4096 of VLAN IDs)
• IEEE 802.1p/Q t ag i nsertion or removal on a per port
basis (egress)
• VLAN ID tag/un-tag options on per port basis
• Fully compliant with IEEE 802.3/802.3u stand ards
• IEEE 802.3x full-duplex with force mode option and half-
duplex back-press ure collision flow cont rol
• IEEE 802.1w rapid spanning tree protocol support
• IGMP v1/v2/v3 snooping for multicast packet filtering
• QoS/CoS packets prioritization support: 802.1p,
DiffServ-based and re-mapping of 802.1p priority field
per port basis on four priority levels
• IPv4/IPv6 QoS support
• IPV6 multicast listener discovery (MLD) snooping
• Programmable rat e li m i t i ng at the ingress and egress
ports on a per port basis
• Jitter-free per packet based rat e l i m iting support
• Tail tag mode (1 byte added before FCS) support on
Port 4 to inform t he processor which ingres s port
receives the packet
• Broadcast storm protection with percentage control
(global and per port basis)
• 1K entry forwarding table with 64K Byte frame buffer
• 4 priority queues with dynamic packet mappi ng for IEEE
802.1P, IPv4 TOS (DIFFSERV), IPv6 Traffic Class, etc.
• Supports Wake on LAN (WoL) using AM D’s Magic
Packet
• VLAN and Address Filtering
• Support 802.1x port-based securit y, authentication and
MAC-based authentication v ia access control lists (ACL)
• Provide port-based and rule-based ACLs to support
layer 2 MAC SA/ DA address, layer 3 IP address an d IP
mask, layer 4 TCP/UDP port number, IP protocol, TCP
flag and their combination for the port security f i ltering
• Ingress and egress rat e l imit based on bit per second
(bps) and packet-based rate limiting (pps)
July 24, 2014 2 Revision 1.0