The BCM56315A0KFEBG switching processor chip supports 12-Gigabit ports with all ports in wirespeed operation. The BCM56315A0KFEBG is ideal for applications such as multi-Gigabit port switches or aggregating multiple-Gigabit ports. For Gigabit ports, the BCM56315A0KFEBG supports PCS (802.3z, 1000BASE-X) or GMII (802.3ab, 1000BASE-T) interfaces with full-duplex operation at Gigabit speed, and full- or half-duplex operation at 10/100 Mbps speed (using 1000BASE-T). The BCM56315A0KFEBG supports 802.1Q VLAN tagging as an option (Qon).
The BCM56315A0KFEBG 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 BCM56315A0KFEBG supports both port-based and tagged (802.1q and 802.3ac) Virtual LAN (VLAN). The BCM5632 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. The BCM56315A0KFEBG supports Ethernet frames with lengths from 64 bytes to 9KB. Runt or long frames are dropped at the input port. The minimum
Feature
Supports 12 Gigabit ports in wirespeed operation
• Gigabit ports support TBI (1000BASE-X) or GMII (1000BASE-T) interfaces
• L2 search table supports 32K MAC addresses
• Jumbo Frame support (9 Kbyte)
• Supports full 4K VLAN addresses 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 standard 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 an 841-pin or a 785-pin BGA
