This product bulletin lists the hardware and software features that are supported in Cisco IOS® Software Release 12.2(20)EWA for the Cisco® Catalyst® 4500 Series Supervisor Engine II-Plus, Cisco Catalyst 4503 Supervisor Engine II-Plus-TS, Cisco Catalyst 4500 Supervisor Engine IV, and Cisco Catalyst 4500 Supervisor Engine V.
Cisco IOS Software Release 12.2(20)EWA is not supported on the Cisco Catalyst 4000 Supervisor Engine I or II or on Cisco routing platforms.
CISCO IOS SOFTWARE RELEASE 12.2(20)EWA SUPPORT
New Hardware Features
Cisco Catalyst 4503 Supervisor Engine II-Plus-TS
The Cisco Catalyst 4503 Supervisor Engine II-Plus-TS delivers enterprise-class reliability and security for the medium-sized business. It provides twelve 10/100/1000 ports with Power over Ethernet (PoE) and eight Small Form-Factor Pluggable (SFP) ports for uplinks or server aggregation. It works in the Catalyst 4503 chassis to deliver up to 116 ports of any combination of 10/100 and 10/100/1000 data access as well as 10/100 and 10/100/1000 PoE access.
Cisco Catalyst 4500 Series 6-Port Alternatively Wired 10/100/1000 PoE or SFP Line Card (WS-X4506-GB-T)
The Cisco Catalyst 4500 Series 6-port nonblocking line card provides the flexibility of two connection options per port: 10/100/1000 (IEEE 802.3af and Cisco prestandard PoE) RJ-45 or 1000BASE-X SFP. This line card provides the ability to mix and match interface types without incurring extra costs.
New Software Features
• Stateful Switchover (SSO)
• Non-Stop Forwarding Awareness (NSF-aware)
• 802.1x with Voice VLAN ID (VVID)
• Forced 10/100 Auto Negotiation
Stateful switchover (SSO) offers zero interruption to Layer 2 sessions in a redundant supervisor engine configuration on Cisco Catalyst 4507R and Cisco Catalyst 4510R chassis. Stateful switchover synchronizes changes in switch configuration and Layer 2 protocol/service state information from the active to the hot standby supervisor engine.
When a failure on the active supervisor engine is detected or if a manual graceful switchover is performed, the hot standby supervisor engine automatically takes control and becomes the active supervisor engine. Subsecond switchover is achieved through stateful switchover without causing link flaps.
Stateful switchover dramatically increases system and network availability while maintaining continuous network access and services. Voice-over-IP calls do not drop, video multicast does not freeze, and user access security does not disappear. Stateful switchover is typically deployed in the network access layer to enhance system availability with a single chassis.
Non-Stop Forwarding Awareness
The Non-Stop Forwarding Awareness (NSF-aware) feature helps NSF-capable switches and routers perform nonstop packet forwarding during their switchovers. It enables neighboring NSF-capable devices to maintain the integrity and accuracy of Layer 3 routing protocol databases. Supported routing protocols include Open Shortest Path First (OSPF), Intermediate System-to-Intermediate System (IS-IS), Enhanced Interior Gateway Routing Protocol (EIGRP), and Border Gateway Protocol (BGP). NSF-aware is fully integrated with Cisco IOS Software Release 12.2(20)EWA and is enabled by default. It requires no configuration for EIGRP/OSPF/IS-IS protocols. It is compatible with non-NSF-aware and non-NSF-capable neighbors.
802.1x with Voice VLAN ID
802.1x with Voice VLAN ID (VVID) allows an IP phone without 802.1x supplicant capability to operate through an 802.1x port. When a Cisco IP phone is recognized through Cisco Discovery Protocol, the switch allows phone traffic on the auxiliary VLAN without 802.1x authentication. If a workstation is connected to the Cisco IP phone, standard 802.1x authentication is performed for the workstation. 802.1x VVID enables uniform 802.1x switch port configuration, with or without IP phones.
Forced 10/100 Autonegotiation
The forced 10/100 autonegotiation feature provides an option to limit interface speed autonegotiation to 100 Mbps or less on a 10/100/1000BASE-T port. It offers investment protection for Cisco Catalyst 4500 Series 10/100/1000 and 10/100/1000 PoE modules. The wire speed 1000 Mbps can be enabled or disabled through switch port configuration changes. Customers can deploy 10/100/1000 modules today and selectively enable 1000-Mbps wire speed in the network for design, rollout, or other business reasons.
Cisco IOS Software Release 12.2EW train offers the latest features for the Cisco Catalyst 4500 Series. Customers with Cisco Catalyst 4500 Series switches that need the latest hardware support and software features should migrate to Cisco IOS Software Release 12.2(20)EWA.
Cisco IOS Software Release 12.1(19)E1 and all subsequent 12.1E maintenance releases have only the feature set based on Cisco IOS Software Release 12.1(12c)EW1 for the Cisco Catalyst 4500 Series. Customers with Cisco Catalyst 4500 Series switches who require the stability of a general deployment release could stay with Cisco IOS Software Release 12.1E train.
Cisco IOS Software Release 12.2(18)EW1 and all subsequent 12.2(18)EW maintenance releases have only the feature set based on Cisco IOS Software Release 12.2(18)EW for the Cisco Catalyst 4500 Series. Customers with Cisco Catalyst 4500 Series switches who require the stability of a bug fix maintenance release could stay with the Cisco IOS Software Release 12.2(18)EW maintenance releases.
Tables 1 and 2 provide product numbers and ordering information for Cisco IOS Software Release 12.2(20)EWA and for supporting hardware.