Cisco WS-C3750G-24TS-E1U Datasheet download pdf (Page 6)

Feature Benefit

 Routing is possible across the stack.

 128 switch virtual interfaces (SVIs) are recommended. Maximum of 1000 are supported (depending on the

number of routes and multicast entries). 468 routed ports are supported per stack.

Integrated Cisco IOS

Software Features for

Bandwidth Optimization

 Per-port broadcast, multicast, and unicast storm control prevents faulty end stations from degrading overall

systems performance.

 IEEE 802.1d Spanning Tree Protocol support for redundant backbone connections and loop-free networks

simplifies network configuration and improves fault tolerance.

 PVST+ allows for Layer 2 load sharing on redundant links to efficiently use the extra capacity inherent in a

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

Networkwide Security

 IEEE 802.1x allows dynamic, port-based security, providing user authentication.

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Cisco WS-C3750G-24TS-E1U Datasheet Page 6

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