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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

1 2 ... 12 13 14 15 16 17 18 19 20 21 22

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