Cisco WS-X6908-10G-2TXL card is an ideal solution for your business network or Data center. Bay Networks stock Cisco Catalyst 6900 Series 8-port 10 Gigabit Ethernet Fiber Module. The first 10 Gigabit Ethernet module that supports Cisco TrustSec and layer 2 encryption in hardware to enable IEEE 802.1ae (MACSec) encryption for Role-Based Access Control (RBACL) functionality. The module has two 40 Gbps connections to the 2 Tbps switch fabric of the supervisor engine 2 T and therefore is able to deliver 10 Gigabit performance on all 8 ports for larger than 128 bytes size packets with no oversubscription. The Cisco Catalyst 6900 Series 8-port 10 Gigabit Ethernet Fiber module supports Virtual Switch Link (VSL) on all 8 ports. The Cisco Catalyst 6900 Series 8-port 10 Gigabit Ethernet Fiber Module supports pluggable X2 optics, providing operational distances of up to 80 km over single-mode fiber and 300 m over multimode fiber allowing for deployment in various types of networking environments. The Cisco Catalyst 6900 Series 8-Port 10 Gigabit Ethernet Fiber module is designed for deployment in the distribution and core of the campus and data center for traffic aggregation in a network requiring security, manageability, virtualization, application performance, and video. With its large 256 MB packet buffers per port, no oversubscription, and distributed forwarding with high scalability. Cisco Catalyst 6900 Series 8-Port 10 Gigabit Ethernet Fiber Module Primary Features Feature Cisco Catalyst 6900 Series 8-Port 10GbE Fiber Module Ports 8 Optics X2 Switch fabric connection 80 Gbps full duplex Oversubscription 1:1 Forwarding engine ●  WS-X6908-10G-2T: comes equipped with DFC4 for distributed forwarding, supporting 256K forwarding entries, increased ACL entries to 64K, increased Netflow entries to 512K, and increased IPv4 forwarding speed to 60 Mpps ●  WS-X6908-10G-2TXL: equipped with DFC4XL for distributed forwarding, supporting 1 million+ forwarding entries, increased ACL entries to 256K, increased Netflow entries to 1 million+ and increased IPv4 forwarding speed to 60 Mpps ●  Increased performance of up to 60Mpps for L2, IPv4 and MPLS forwarding and up to 30Mpps for IPv6 forwarding ●  Increased multicast routes to 256K ●  Support for 16K Bridge Domains, allowing the standard 4K VLANs to be reused across these bridge domains, effectively increasing the number of VLANs available in the system ●  Increased MAC Address Table to 128K ●  IPV4 IGMPv3 snooping in hardware ●  IPv6 MLDv2 snooping in hardware ●  PIM registers in hardware ●  IPV4 & IPv6 in IPv6 tunneling ●  IPv6 in IPv4 tunneling (ISATAP, 6to4, GRE) ●  QoS support for uniform, short pipe and pipe mode tunnel ●  Terminate the tunnel in the same loopback Security ●  TrustSec and IEEE 802.1ae Layer 2 Encryption in HW to enable MACSec Queues ●  Receive: 8q4t ●  Transmit: 1p7q4t Queuing mechanisms ●  Class of Service (CoS) based queue mapping ●  Differentiated Service Code Point (DSCP) based queue mapping Scheduler ●  Deficit Weighted Round Robin (DWRR) ●  Weighted Random Early Detection (WRED) ●  Smoothed Round Robin (SRR) at egress Port buffers ●  256MB per port Hardware-based multicast replication ●  Ingress and egress ●  Approximately 20 Gbps per replication engine ●  4 replication engines per module delivering total throughput of 80 Gbps Jumbo frame support for bridged and routed packets Up to 9216 bytes Maximum port density per chassis 64 ports (6509-E chassis) 88 ports (6513-E chassis) Maximum port density per VSS 128 ports (6509-E chassis) 176 ports (6513-E chassis) Can be used to form virtual switch link Yes (all ports) Supervisor engines supported Supervisor Engine 2T and 2TXL Chassis supported ●  Any Cisco Catalyst 6500 E-Series chassis, including 6503-E, 6504-E, 6506-E, 6509-E, 6509-V-E, 6513-E (NEBS compliant: operating temperature up to 55°C) ●  Not supported in non-E Series chassis. Slot requirements ●  Can occupy any slot in any Cisco Catalyst 6503-E, 6504-E, 6506-E, 6509-E, or 6509-V-E chassis ●  Can occupy slots 1-6 and 9-13 in a Cisco Catalyst 6513-E chassis Onboard memory 2 GB default (no higher upgrade)