Cisco WS-C3550-48-EMI Bedienungsanleitung PDF herunterladen (Seite 10)

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Tracking Users • DHCP Interface Tracker (Option 82) provides capabilities to locate a user on a network by

providing switch and port ID to a DHCP server.

• MAC Address Notiﬁcation allows administrators to be notiﬁed of new users added or

removed from the network.

• Support for CiscoWorks User Registration Tool and the User Tracker in CiscoWorks Campus

Manager both provide the ability to track the location of users.

Quality of Service/Control

Advanced Quality

of Service

• 802.1p CoS and Differentiated Services Code Point (DSCP) ﬁeld classiﬁcation via marking

and reclassiﬁcation on a per packet basis using source/destination IP address, source/

destination MAC address, or Layer 4 TCP/UDP port number.

• Automatic QoS (Auto-QoS) greatly simpliﬁes the conﬁguration of QoS in VoIP networks by

issuing interface and global switch commands that allow the detection of Cisco IP phones,

the classiﬁcation of trafﬁc, and egress queue conﬁguration.

• Cisco control plane and data plane quality of service ACLs on all ports to ensure proper

marking on a per packet basis.

• Four egress queues per port supported in hardware to enable differentiated management of

up to four types of trafﬁc.

• WRR scheduling to ensure differential prioritization of packet ﬂows by intelligently servicing

the egress queues.

• WRED on all Gigabit Ethernet ports for avoidance of congestion at the egress queues before

a disruption occurs.

• Strict priority queuing to guarantee that the highest priority packets will always get serviced

ahead of all other trafﬁc.

• No performance penalty for highly granular quality of service functionality.

Granular

Rate-Limiting

• CIR functionality allows bandwidth to be guaranteed in increments as low as 8 Kbps.

• Rate-limiting based on source/destination IP address, source/destination MAC address, or

Layer 4 TCP/UDP information or any combination of these ﬁelds using QoS ACLs (IP ACLs or

MAC ACLs), class maps, and policy maps.

• Per port, per VLAN ingress policing enables the rate-limiting of individual VLANs on trunk

ports.

• Ability to easily manage data ﬂows asynchronouslyupstream anddownstream fromthe end

station or on the uplink via ingress and ingress policing.

• 8 aggregate or individual ingress policers and 8 aggregate egress policers on each 10/100

port.

• 128 aggregate or individual ingress policers and 8 aggregate egress policers on each Gigabit

Ethernet port.

Table 1 Product Features and Beneﬁts (Continued)

Feature Benefit

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 18 19

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