Datasheet

Data Sheet
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Unidirectional Link Detection Protocol (UDLD) and Aggressive UDLD allow unidirectional
links caused by incorrect fiber-optic wiring or port faults to be detected and disabled on
fiber-optic interfaces.
High Availability
The Cisco Catalyst 3750-E Series increases availability for stackable switches. Each switch can
operate both as master controller and as forwarding processor. Each switch in the stack can serve
as a master, creating a 1:N availability scheme for network control. In the unlikely event of a single
unit failure, all other units continue to forward traffic and maintain operation.
Other high-availability features include but are not limited to:
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Cross-Stack EtherChannel provides the ability to configure Cisco EtherChannel technology
across different members of the stack for high resiliency.
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Flexlink provides link redundancy with convergence time less than 100 ms.
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IEEE 802.1s/w Rapid Spanning Tree Protocol (RSTP) and Multiple Spanning Tree Protocol
(MSTP) provide rapid spanning-tree convergence independent of spanning-tree timers and
also offers the benefit of Layer 2 load balancing and distributed processing. Stacked units
behave as a single spanning-tree node.
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Per-VLAN Rapid Spanning Tree (PVRST+) allows rapid spanning-tree reconvergence on a
per-VLAN spanning-tree basis, without requiring the implementation of spanning-tree
instances.
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Cisco Hot Standby Router Protocol (HSRP) is supported to create redundant, failsafe
routing topologies.
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Switch-port autorecovery (Errdisable) automatically attempts to reactivate a link that is
disabled because of a network error.
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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Basic IP unicast routing protocols (Static, Routing Information Protocol Version 1 [RIPv1],
and RIPv2) are supported for small-network routing applications.
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Advanced IP unicast routing protocols (OSPF, EIGRP, and BGPv4) are supported for load
balancing and constructing scalable LANs. The IP Services feature set is required.
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IPv6 routing (RIPng, 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), and PIM sparse-dense mode. The
IP Services feature set is required.