High-Performance IP Routing
Cisco Express Forwarding hardware routing architecture delivers extremely high-performance IP
routing in the Cisco Catalyst 3750-E Series Switches.
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IP unicast routing protocols (Static, Routing Information Protocol Version 1 [RIPv1], and
RIPv2, RIPng, EIGRP stub) are supported for small-network routing applications.
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Advanced IP unicast routing protocols (OSPF, EIGRP, BGPv4 and IS-ISv4) are supported
for load balancing and constructing scalable LANs. The IP Services feature set is required.
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IPv6 routing (RIPing, OSPFv3) is supported in hardware for maximum performance.
Advanced IP Services feature set is required for IPv6 routing.
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Equal-cost routing facilitates Layer 3 load balancing and redundancy across the stack.
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Policy-based routing (PBR) allows superior control by facilitating flow redirection regardless
of the routing protocol configured. The IP Services feature set is required.
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HSRP provides dynamic load balancing and failover for routed links, up to 32 HSRP links
supported per unit or stack.
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Protocol Independent Multicast (PIM) for IP multicast routing is supported, including PIM
sparse mode (PIM-SM), PIM dense mode (PIM-DM), PIM sparse-dense mode. The IP
Services feature set is required.
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Distance Vector Multicast Routing Protocol (DVMRP) tunneling interconnects 2 multicast-
enabled networks across nonmulticast networks. The IP Services feature set is required.
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Fallback bridging forwards non-IP traffic between two or more VLANs. The IP Services
feature set is required.
Superior Quality of Service
The Cisco Catalyst 3750-E Series offers Gigabit Ethernet speed with intelligent services that keep
everything flowing smoothly, even at 10 times the normal network speed. Industry-leading
mechanisms for marking, classification, and scheduling deliver superior performance for data,
voice, and video traffic, all at wire speed.
Following are some of the QoS features supported in the Cisco Catalyst 3750-E Series Switches:
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Cross-stack QoS allows QoS to be configured across the entire stack.
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802.1p class of service (CoS) and differentiated services code point (DSCP) field
classification is provided, using marking and reclassification on a per-packet basis by source
and destination IP address, MAC address, or Layer 4 TCP/UDP port number.
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Cisco control-plane and data-plane QoS ACLs on all ports help ensure proper marking on a
per-packet basis.
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Four egress queues per port help enable differentiated management of up to four traffic
types across the stack.
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Shaped Round Robin (SRR) scheduling helps ensure differential prioritization of packet
flows by intelligently servicing the ingress queues and egress queues.
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Weighted Tail Drop (WTD) provides congestion avoidance at the ingress and egress
queues before a disruption occurs.
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Strict priority queuing helps ensure that the highest-priority packets are serviced ahead of all
other traffic.
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