Cisco 3120 Series Quickspecs - Страница 12

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QuickSpecs

Technical Specifications

VLAN Features

Quality of Service

Features

Management Features

DA - 13023

Cisco Catalyst Blade Switch 3120 for HP

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

EtherChannel® groups or Gigabit EtherChannel® groups to link to the

upstream switch/router, or server blades

Link Aggregation Control Protocol (LACP) allows the creation of Ethernet

channeling with upstream switches that conform to IEEE 802.3ad. This

feature is similar to Cisco EtherChannel technology and PAgP.

Private VLANs restrict traffic between hosts in a common segment by

segregating traffic at Layer 2, turning a broadcast segment into a

nonbroadcast multi-access-like segment.

Private VLAN Edge provides security and isolation between switch ports,

which helps ensure that users cannot snoop on other users' traffic.

Dynamic VLAN assignment is supported through implementation of VLAN

Membership Policy Server client capability to provide flexibility in assigning

ports to VLANs. Dynamic VLAN facilitates the fast assignment of IP addresses.

Wire-rate performance for highly granular QoS functions (for example,

granular rate limiting).

Cross-switch QoS allows QoS to be configured across the entire VBS.

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.

Cisco control-plane and data-plane QoS ACLs on all ports help ensure

proper marking on a per-packet basis.

Four egress queues per port help enable differentiated management of up to

four traffic types.

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.

The 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.

Up to 64 aggregate or individual policers are available.

Cisco IOS Software CLI support provides common user interface and

command set with all Cisco routers and Cisco Catalyst desktop switches.

Worldwide — Version 4 — May 1, 2009

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