Cisco 3750E-24TD - Catalyst Switch - Stackable Uživatelský manuál stáhnout pdf (Strana 5)

Data Sheet

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Port Aggregation Protocol (PAgP) automates the creation of Cisco Fast EtherChannel

groups or Gigabit

EtherChannel groups to link to another switch, router, or server.

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Link Aggregation Control Protocol (LACP) allows the creation of Ethernet channeling with devices that

conform to IEEE 802.3ad. This feature is similar to Cisco EtherChannel technology and PAgP.

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Automatic media-dependent interface crossover (MDIX) automatically adjusts transmit and receive pairs if an

incorrect cable type (crossover or straight-through) is installed.

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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:

●

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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IP unicast routing protocols (Static, Routing Information Protocol Version 1 [RIPv1], RIPv2, RIPng, EIGRP

stub, and OSPF) 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. IPv6 routing (OSPFv3, EIGRPv6) is supported in hardware for maximum

performance. The IP Services feature set is required.

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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 and Source Specific Multicast (SSM). The IP

Services feature set is required.

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