Copyright © 1998 Cisco Systems, Inc. All Rights Reserved.
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Cisco IOS IP Routing Support • RIP
• EIGRP
• NLSP (future)
• Fast convergence around failures with EIGRP
• Stable, time-tested and proven industry-standard
routing protocol feature set
Integrated Routing and Bridging (IRB) • Both routing and bridging on ports or sets of ports • Supports nonroutable protocols and facilitates some
address transition plans.
HSRP • Cisco value add protocol for router redundancy • Network redundancy and loadsharing with smooth
integration into existing Cisco networks; failover
transparent to end users.
Rich QoS
Nonblocking, Shared-Memory Switching Fabric with
Low Latency and Rich Mechanisms for Queuing and
Scheduling
• Dynamic allocation of shared memory maximizes
performance and flexibility with a high degree of
effective buffer utilization
• Supports all IP QoS and IEEE 802.1Q traffic classes
and allows for reservations on demand while
minimizing packet loss.
Integrated into CiscoAssure Policy Networking
Architecture
• Integral part of end-to-end QoS architecture • Provides simple means to define policies that
prioritize users or applications in the network.
Per-Flow Queuing • Granular traffic queuing capability • Differentiate and protect mission-critical applications
from other traffic.
Weighted Round Robin (WRR) • Differentiated queue scheduling discipline • Fair, differentiated delay probability for traffic
classes, including multiple IP Precedence levels,
ToS, or RSVP service classes.
Per-Queue Drop Thresholds • Supports early discarding of packets when
user-defined buffer threshold(s) are exceeded
• Multiple thresholds offer differentiated loss
probability for multiple IP Precedence level or ToS
service classes.
Traffic Policing and Rate Limiting • Token bucket algorithm for frame switching (future) • Ensures that traffic reservations are guaranteed by
protecting against misbehaving or noncompliant
traffic.
Resource and Policy Admission Control • RSVP reservations and other emerging reservation
routing protocols require sophisticated resource and
policy admission control algorithms
• Ensures that guarantees made to existing flows or
policies set by CiscoAssure can be honored when
setting up new reservations.
Cisco IOS Intelligent Network Services
Mobility • DHCP
• BOOTP relay
• Local-area mobility
• Offers numerous options to support dynamic IP
addressing in environments with frequently moving
desktops, as well as transition to DHCP deployment
strategies
Routing Security • MD5 route authentication • Prevents unauthorized routers from interrupting
trusted router operations
VLANs • Cisco ISL
• 802.1Q via a future software upgrade
• Allows multiple subnets to be overlaid logically
between the backbone and wiring closets
• Allows smooth integration with installed Catalyst
LAN switches
Load Sharing Across Redundant Links • Support for Fast EtherChannel and Gigabit
EtherChannel
• Support for parallel links using unique Layer 3
load-balancing algorithm
• Increases effective link bandwidth and network
uptime
Manageability Mechanisms
Table 7 Catalyst 8500 Features and Benefits Summary (Continued)
Feature Comment/Description Benefit
(9 pages)
(144 pages)
(28 pages)
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