Layer 3 Features - Cisco WS-C3020 Software Configuration Manual

Chapter 1 Overview
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Layer 3 Features

These are the Layer 3 features:
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OL-8915-03
Policing
Traffic-policing policies on the switch port for managing how much of the port bandwidth
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should be allocated to a specific traffic flow
If you configure multiple class maps for a hierarchical policy map, each class map can be
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associated with its own port-level (second-level) policy map. Each second-level policy map can
have a different policer.
Aggregate policing for policing traffic flows in aggregate to restrict specific applications or
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traffic flows to metered, predefined rates
Out-of-Profile
Out-of-profile markdown for packets that exceed bandwidth utilization limits
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Ingress queueing and scheduling
Two configurable ingress queues for user traffic (one queue can be the priority queue)
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Weighted tail drop (WTD) as the congestion-avoidance mechanism for managing the queue
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lengths and providing drop precedences for different traffic classifications
Shaped round robin (SRR) as the scheduling service for specifying the rate at which packets are
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sent to the internal ring (sharing is the only supported mode on ingress queues)
Egress queues and scheduling
Four egress queues per port
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– WTD as the congestion-avoidance mechanism for managing the queue lengths and providing
drop precedences for different traffic classifications
SRR as the scheduling service for specifying the rate at which packets are dequeued to the
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egress interface (shaping or sharing is supported on egress queues). Shaped egress queues are
guaranteed but limited to using a share of port bandwidth. Shared egress queues are also
guaranteed a configured share of bandwidth, but can use more than the guarantee if other queues
become empty and do not use their share of the bandwidth.
HSRP for Layer 3 router redundancy
IP routing protocols for load balancing and for constructing scalable, routed backbones, including
RIP Versions 1 and 2
IP routing between VLANs (inter-VLAN routing) for full Layer 3 routing between two or more
VLANs, allowing each VLAN to maintain its own autonomous data-link domain
Static IP routing for manually building a routing table of network path information
Equal-cost routing for load balancing and redundancy
Internet Control Message Protocol (ICMP) and ICMP Router Discovery Protocol (IRDP) for using
router advertisement and router solicitation messages to discover the addresses of routers on directly
attached subnets
DHCP relay for forwarding UDP broadcasts, including IP address requests, from DHCP clients
IPv6 unicast host management
Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide
Features
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