Datasheet

Data Sheet

Cisco Catalyst 4500 Series Supervisor Engine Ii-Plus Redundancy for Business

Resiliency

The Cisco Catalyst 4507R chassis has been designed with optional 1 + 1 redundant supervisor

capability using the Cisco Catalyst 4500 Series Supervisor Engine II-Plus for integrated resiliency.

One of these supervisor engines is designated as the primary (active) and is responsible for

normal system operation; the other (secondary) serves as a standby, monitoring the operation of

the primary supervisor.

Stateful Switchover (SSO) offers continuous packet forwarding during supervisor engine

switchover. Information is fully synchronized between supervisors to allow the standby supervisor

to immediately take over in subsecond time if the primary fails. In Service Software Upgrade

(ISSU) allows customers to upgrade or downgrade complete Cisco IOS

Software images with

minimal to no disruption to the network when using a redundant Catalyst 4500 Series system with

dual supervisors. It enables rapid, nondisruptive software upgrade for new line cards, new power

supplies, new features, or bug fixes. ISSU offers continuous packet forwarding during the

supervisor engine switchover running different Cisco IOS Software versions.

SSO and ISSU dramatically improve the network reliability and availability in a Layer 2 or Layer 3

environment. SSO and ISSU are essential for business-critical applications such as voice over IP

(VoIP) to help ensure that VoIP calls are not dropped.

When the primary supervisor fails, the secondary supervisor assumes control of the chassis. This

algorithm prevents oscillations between primary and secondary supervisors. Alerts are generated

to the network-monitoring software if either fails. A supervisor switchover can be forced by

software, or by the user through the console or with the Simple Network Management Protocol

(SNMP).

Predictable Performance and Scalability

The Cisco Catalyst 4500 Series Supervisor Engine II-Plus delivers a 64-Gbps switching fabric with

a 48-million-packets-per-second (mpps) forwarding rate in hardware for Layer 2–4 traffic.

Switching performance is independent of the number of route entries or advanced Layer 3 and 4

services enabled. The Cisco Catalyst 4500 Series is optimized for multimedia applications with its

advanced multicast support and wire-speed switching in hardware. Protocol Independent Multicast

(PIM) and Source Specific Multicast (SSM) are supported, providing end users with additional

scalability to support multimedia applications.

The Cisco Catalyst 4500 Series Supervisor Engine II-Plus supports Internet Group Management

Protocol (IGMP) snooping in hardware, enhancing the performance of multimedia applications and

reducing network traffic by allowing a switch to dynamically add and remove hosts from a multicast

group.

Intelligent Network Services with QoS and Sophisticated Traffic Management

The Cisco Catalyst 4500 Series Supervisor Engine II-Plus offers superior per-port QoS features to

help ensure that network traffic is optimally classified, prioritized, and scheduled to efficiently

handle multimedia, time-sensitive (voice), and mission-critical applications. This supervisor engine

can classify, police, and mark incoming packets, allowing the administrator to differentiate between

traffic flows and to enforce policies based on granular QoS fields. Sharing, shaping, and strict

priority configurations determine scheduling of egress traffic. This supervisor engine also supports

Dynamic Buffer Limiting (DBL), a congestion-avoidance feature.