ماژول سیسکو Cisco Catalyst 4500 Series Supervisor Engine IV
|لایه کاربردی||Layer2 / Layer 3|
|قابل مدیریت کردن||✔|
The Cisco Catalyst 4500 Series Supervisor Engine IV integrates nonblocking Layers 2–4 switching with integrated resiliency, further enhancing control of converged networks. Converged data, voice, and video networks with high availability enable business resiliency for enterprise and Metro Ethernet customers deploying Internet-based business applications. Network control extends from the backbone to the edge with intelligent services such as granular quality of service (QoS), Internet security, and network management. Scalability of these intelligent network services is made possible with dedicated specialized resources known as ternary content addressable memory (TCAM). Ample TCAM resources (192,000 entries) enable “high feature capacity,” which provides wire-speed routing and switching performance with concurrent provisioning of services such as QoS and security, helping ensure scalability for today’s network requirements with ample room for future growth.
Supervisor Engine IV Redundancy for Business Resiliency
The Cisco Catalyst 4507R chassis using the supervisor engine IV has been designed with an optional 1+1 redundant supervisor capability for integrated resiliency. One supervisor engine IV is designated as the primary (active) supervisor and is responsible for normal system operation; the other (secondary) can serve as a standby, monitoring the operation of the primary supervisor.
Nonstop Forwarding with Stateful Switchover (NSF/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 you to upgrade or downgrade complete Cisco IOS Software images with minimal to no disruption to the network when using a redundant Cisco Catalyst 4500 system with dual supervisors. It allows for a 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.
NSF/SSO and ISSU dramatically improve the network reliability and availability in a Layer 2 or Layer 3 environment. NSF/SSO and ISSU are essential for business-critical applications such as voice over IP (VoIP). With these features, VoIP calls are not dropped.
The supervisor engine IV redundancy scheme is similar to that of the supervisor engine V and V-10GE models. Alerts are generated to the network monitoring software if either supervisor fails, and hot-swapping of supervisors is supported without disrupting system operation. Either the software or you can force switchover of supervisor engines with Simple Network Management Protocol (SNMP). The resiliency features of the Cisco Catalyst 4500 Series help prevent network outages that could result in lost business and revenue. Table 3 gives high-availability and uplink options for the supervisor engines.