The BCM56321B1KFSBG switching processor chip supports 12 Gigabit ports and one 10-Gigabit uplink with all ports in wirespeed operation. The BCM56321B1KFSBG is ideal for applications such as multi-Gigabit port switches or aggregating multiple-Gigabit ports to a 10-Gigabit backplane.
For Gigabit ports, the BCM56321B1KFSBG supports PCS (802.3z, 1000BASE-X) or GMII (802.3ab, 1000BASE-T) interfaces with full-duplex operation at Gigabit speed, and full- or halfduplex operation at 10/100 Mbps speed (using 1000BASET). For the uplink port, the BCM56321B1KFSBG supports XGMII. The BCM56321B1KFSBG supports 802.1Q VLAN tagging as an option (Qon).
The BCM56321B1KFSBG supports 802.1v VLAN Classification by Protocol. There are four user-programmable protocols that can be set up per port by the VLAN Classification EtherType and the VLAN Priority/TAG registers.
The BCM56321B1KFSBG supports both port-based and tagged (802.1q and 802.3ac) Virtual LAN (VLAN). The BCM56321B1KFSBG also supports 4K VLAN addresses with the 802.1s Multiple Spanning Tree option, and flexible and programmable ingress and egress checking rules for VLAN processing.
Feature
• Supports 12 Gigabit ports and one 10-Gigabit uplink in wirespeed operation
• Gigabit ports support TBI (1000BASE-X) or GMII (1000BASE-T) interfaces
• Uplink supports XGMII interface for 10-Gigabit
• L2 search table supports 32K MAC addresses
• Jumbo Frame support (9 KB)
• Supports 4K VLAN address and 802.1s Multiple Spanning Tree protocol
• Supports 802.1p and/or DiffServ with four priority queues
• Supports 802.3ad link aggregation control protocol (LACP) and marker protocol
• Supports selected MIB groups in RMON and SMON
• Supports up to 32K IP multicast groups with the
option to cross VLAN boundaries
• Full-duplex and half-duplex operation with IEEE 802.3x flow control and backpressure
• Built in 32-bit, 33-MHz PCI bus interface
• Flexible multiplexer modes
• Packaged in 785-pin BGA
