Datasheet

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Feature Benefit
redundant design.
• IEEE 802.1s Multiple Spanning Tree Protocol allows a spanning-tree instance per VLAN, for Layer 2 load
sharing on redundant links.
• Equal-cost routing facilitates Layer 3 load balancing and redundancy across the stack. EMI is required.
• Local Proxy Address Resolution Protocol (ARP) works in conjunction with Private VLAN Edge to
minimize broadcasts and maximize available bandwidth.
• VLAN1 minimization allows VLAN1 to be disabled on any individual VLAN trunk link.
• VLAN Trunking Protocol (VTP) pruning limits bandwidth consumption on VTP trunks by flooding
broadcast traffic only on trunk links required to reach the destination devices.
• Internet Group Management Protocol (IGMP) snooping provides fast client joins and leaves of multicast
streams and limits bandwidth-intensive video traffic to only the requestors.
• Multicast VLAN Registration (MVR) continuously sends multicast streams in a multicast VLAN while
isolating the streams from subscriber VLANs for bandwidth and security reasons.
• Up to 12 EtherChannel groups are supported per stack.
Scalable Stacking
• Cisco StackWise stacking creates a 32-Gbps switch interconnection. Stacking does not require user ports.
Up to 9 units can be stacked together for a maximum of 468 10/100 ports, 468 10/100/1000 ports, 108
optical aggregation ports, nine 10 Gigabit Ethernet ports, or any mix thereof.
QoS AND CONTROL
Advanced QoS
• Cross-stack QoS allows QoS to be configured across the entire stack.
• 802.1p class of service (CoS) and differentiated services code point (DSCP) field classification are provided,
using marking and reclassification on a per-packet basis by source and destination IP address, source and
destination MAC address, or Layer 4 Transmission Control Protocol/User Datagram Protocol (TCP/UDP)
port number.
• Cisco control-plane and data-plane QoS ACLs on all ports help ensure proper marking on a per-packet basis.
• 4 egress queues per port help enable differentiated management of up to 4 traffic types across the stack.
• Shaped Round Robin (SRR) scheduling helps ensure differential prioritization of packet flows by
intelligently servicing the ingress queues and egress queues.
• Weighted Tail Drop (WTD) provides congestion avoidance at the ingress and egress queues before a
disruption occurs.
• Strict priority queuing helps ensure that the highest-priority packets are serviced ahead of all other traffic.
• There is no performance penalty for highly granular QoS capability.
Granular Rate Limiting
• Cisco committed information rate (CIR) function provides bandwidth in increments as low as 8 Kbps.
• Rate limiting is provided based on source and destination IP address, source and destination MAC address,
Layer 4 TCP/UDP information, or any combination of these fields, using QoS ACLs (IP ACLs or MAC
ACLs), class maps, and policy maps.
• Asynchronous data flows upstream and downstream from the end station or on the uplink are easily managed
using ingress policing and egress shaping.
• Up to 64 aggregate or individual policers are available per Fast Ethernet or Gigabit Ethernet port.
NETWORK SECURITY