Datasheet

Cisco Systems, Inc.
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QoS metering/
policing at ingress
• Support for metering/policing of incoming packets restricts incoming traffic flows to a
certain rate.
• The switches support up to six policers per Fast Ethernet port, and 60 policers on a Gigabit
Ethernet port.
• The switches offer granularity of traffic flows at 1 Mbps on Fast Ethernet ports, and 8 Mbps
on Gigabit Ethernet ports.
QoS marking at
ingress
• The switches support marking and remarking packets based on the state of policers/
meters.
• The switches support marking and remarking based on the following mappings: from
DSCP to 802.1p, and from 802.1p to DSCP.
• The switches support 14 well-known and widely used DSCP values.
• The switches support classifying or reclassifying packets based on the default DSCP per
port, and support classification based on DSCP values in the ACL.
• The switches support classifying or reclassifying frames based on the default 802.1p value
per port.
• The switches support 802.1p override at ingress.
QoS scheduling
support at egress
• Four queues per egress port are supported in hardware.
• The WRR queuing algorithm ensures that low-priority queues are not starved.
• Strict Priority Scheduling ensures that time-sensitive applications such as voice always
follow an expedited path through the switch fabric.
Sophisticated traffic
management
• The switch supports up to six policers per Fast Ethernet port and up to 60 policers on a
Gigabit Ethernet port.
• The switch offers granularity of traffic flows at 1 Mbps on Fast Ethernet ports and 8 Mbps
on Gigabit Ethernet ports.
• The switch offers the ability to limit data flows based on MAC source or destination
address, IP source or destination address, TCP/UDP port numbers, or any combination of
these fields.
• The switch offers the ability to manage data flows asynchronously upstream and
downstream from the end station or on the uplink.
Management
Superior
manageability
• An embedded Remote Monitoring (RMON) software agent supports four RMON groups
(history, statistics, alarms, and events) for enhanced traffic management, monitoring, and
analysis.
• The switch supports all nine RMON groups through the use of a Cisco SwitchProbe
®
Analyzer Switched Port Analyzer (SPAN) port, permitting traffic monitoring of a single port,
a group of ports, or the entire switch from a single network analyzer or RMON probe.
• A SPAN port monitors traffic of a single port from a single network analyzer or RMON
probe.
• Remote SPAN (RSPAN) allows network administrators to locally monitor ports in a Layer 2
switch network from any other switch in the same network.
• The Domain Name System (DNS) provides IP address resolution with user-defined device
names.
• Trivial File Transfer Protocol (TFTP) reduces the cost of administering software upgrades by
downloading from a centralized location.
• Network Timing Protocol (NTP) provides an accurate and consistent timestamp to all
switches within the intranet.
Table 1 Product Features and Benefits
Feature Benefit