Cisco 3750V2 - Catalyst 24 10/100 Arkusz danych - Strona 6
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Drukuj stronęIP source guard prevents a malicious user from spoofing or taking over another user's IP address by creating
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a binding table between the client's IP and MAC addresses, port, and VLAN.
DHCP Interface Tracker (Option 82) augments a host IP address request with the switch port ID.
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Port security secures the access to an access or trunk port based on the MAC address.
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After a specific time period, the aging feature removes the MAC address from the switch to allow another
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device to connect to the same port.
The Trusted Boundary feature provides the capability to trust the QoS priority settings if an IP phone is
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present and to disable the trust settings if the IP phone is removed, thereby preventing a malicious user from
overriding prioritization policies in the network.
Multilevel security on console access prevents unauthorized users from altering the switch configuration.
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The user-selectable address-learning mode simplifies configuration and enhances security.
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Bridge protocol data unit (BPDU) guard shuts down Spanning Tree Protocol PortFast-enabled interfaces
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when BPDUs are received to avoid accidental topology loops.
Spanning-Tree Root Guard (STRG) prevents edge devices not in the network administrator's control from
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becoming Spanning Tree Protocol root nodes.
Internet Group Management Protocol (IGMP) filtering provides multicast authentication by filtering out
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nonsubscribers and limits the number of concurrent multicast streams available per port.
Dynamic VLAN assignment is supported through implementation of VLAN Membership Policy Server (VMPS)
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client functions to provide flexibility in assigning ports to VLANs. Dynamic VLAN helps enable fast assignment
of IP addresses.
Cisco Network Assistant software security wizards ease the deployment of security features for restricting
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user access to a server as well as to a portion of or the entire network.
Two thousand access control entries are supported.
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Availability and Scalability
The Cisco Catalyst 3750 v2 Series is equipped with a robust set of features that allow network scalability and higher
availability through IP routing as well as a complete suite of Spanning Tree Protocol enhancements that help
increase availability in a Layer 2 network.
Enhancements to the standard Spanning Tree Protocol, such as Per-VLAN Spanning Tree Plus (PVST+), Uplink
Fast, and PortFast, increase network uptime. PVST+ allows Layer 2 load sharing on redundant links to efficiently use
the additional capacity inherent in a redundant design. Uplink Fast, PortFast, and BackboneFast all greatly reduce
the standard 30- to 60-second Spanning Tree Protocol convergence time. Loop guard and BPDU guard provide
Spanning Tree Protocol loop avoidance. Superior redundancy features include the following:
Cisco Uplink Fast and BackboneFast technologies help ensure quick failover recovery, enhancing overall
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network stability and reliability.
IEEE 802.1w Rapid Spanning Tree Protocol (RSTP) provides rapid spanning-tree convergence independent
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of spanning-tree timers and the benefit of distributed processing.
PVRST+ allows rapid spanning-tree reconvergence on a per-VLAN spanning-tree basis, without requiring
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implementation of spanning-tree instances.
Cisco Hot Standby Router Protocol (HSRP) is supported to create redundant, fail-safe routing topologies.
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FlexLink enables fast failover for redundant links in a Layer 2 network. FlexLink offers a faster convergence
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than Spanning Tree Protocol and eliminates the need for Spanning Tree Protocol.
© 2009 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
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