Cisco IOS XE Software Release 3.2.0SG and Cisco IOS Software Release 15.0(2)SG for Cisco Catalyst 4500 Series and Cisco Catalyst 4900 Series Fixed-Configuration Switches
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Updated:Apr 15, 2011
This product bulletin describes the primary hardware and software features supported by Cisco IOS
® XE Software Release 3.2.0SG and Cisco IOS Software Release 15.0(2)SG for the following switches and supervisor engines:
Primary Hardware and Software Service Innovations Delivered in Cisco IOS XE Software Release 3.2.0SG and Cisco IOS Software Release 15.0(2)SG
Cisco IOS XE Software Release 3.2.0SG and Cisco IOS Software Release 15.0(2)SG are the base releases for new extended maintenance trains delivering leading borderless network services in campus access and aggregation deployments. The main innovations include:
• NetFlow-lite to provide NetFlow-like traffic monitoring capability on the top-of-the-rack (ToR) Cisco Catalyst 4948E and 4948E-F Switches for data centers
• Web Cache Communications Protocol Version 2 (WCCPv2) for Cisco Catalyst Supervisor Engine 6-E and 6L-E, and on Cisco Catalyst 4900M, 4948E, and 4948E-F Switches to redirect web traffic to a server that provides web caching
• Cisco TrustSec® features to simplify campus deployment for dot1x
• 32k mroutes support for Cisco Catalyst Supervisor Engine 7-E
• Cisco Discovery Protocol (CDP) enhancements for location support
NetFlow-lite (Figure 1) provides traffic-monitoring capability for Layer 2 and Layer 3 traffic on data center top-of-rack switches 4948E and 4948E-F. The ability to monitor traffic allows these switches to gain visibility into server-to-server traffic as well as server-to-client traffic or vice versa. With this feature, customers will be able to determine the top talkers in the network (top applications, servers, hosts), get an accurate estimate of network-link utilization at the rack level and make informed decisions for capacity planning. NetFlow-lite complies with standards-based NetFlow v9 and IPFIX format, and it can work with existing NetFlow Collectors (Phase 1 requires converter).
Figure 1. NetFlow-lite
WCCPv2 for Cisco Catalyst Supervisor Engine 6-E and 6L-E and Catalyst 4900M and 4948E Series Switches
Web Content Communication Protocol (WCCP) Version 2 Layer 2 redirection enables a Cisco Catalyst 4500 Series Switch to transparently redirect content requests to directly connected content engines using a Layer 2/MAC address rewrite. The WCCPv2 Layer 2 redirection is accelerated in the switching hardware and thus is more efficient than Layer 3 redirection using Generic Routing Encapsulation (GRE). The content engines in a cache cluster transparently store frequently accessed content and then fulfill successive requests for the same content, eliminating repetitive transmissions of identical content from the original content servers. This feature supports the transparent redirection of HTTP and non-HTTP traffic with well-known ports or dynamic services, such as web caching, HTTPS caching, File Transfer Protocol (FTP) caching, proxy caching, media caching, and streaming services. WCCPv2 Layer 2 redirection is typically deployed for transparent caching at the network edge, such as regional or branch sites. Access control list (ACL) redirection list and both incoming and outgoing traffic redirection on an interface is supported; however, WCCPv2 Layer 2 redirection cannot be enabled on the same input interface with Policy-Based Routing (PBR) or Virtual Route Forwarding (VRF)-lite. ACL-based classification for Layer 2 redirection is not supported.
Critical Auth for Voice and Data and Multi-auth and VLAN Assignment
Critical Auth for Voice and Data (Inaccessible Authentication Bypass) feature authorizes and allows access for voice and data clients when RADIUS servers become unavailable. Multi-auth and VLAN assignment allows the RADIUS server to assign VLANs to ports in multi-authentication mode.
IEEE 802.1ag - D8.1 Standard Compliant CFM
Ethernet CFM is an end-to-end, per-service-instance Ethernet layer Operation, Administration, and Maintenance (OAM) protocol. CFM includes proactive connectivity monitoring, fault verification, and fault isolation for large Ethernet metropolitan area networks (MANs) and wide area networks (WANs).
This feature is the implementation of IEEE 802.1ag Standard Compliant CFM in Cisco IOS Software.
Propagation of Location Information over CDP and Duplication Location Reporting Issue
The Propagation of Location Information over CDP feature helps to ensure that location information is transmitted from wired switches over CDP to the attached end devices. CDP allows only one wired switch to report the location information by identifying and indicating the location of neighbor ports not to report the duplicate location information of the same device.
Repackaging of Software Features
Tables 2 provides packaging changes for Cisco IOS XE Software Release 3.2.0SG and Cisco IOS Software Release 15.0(2)SG.
Table 2. Packaging changes for Cisco IOS XE Software Release 3.2.0SG and Cisco IOS Software Release 15.0(2)SG
HSRPv2 for IPv6
Ent. Services only
IP Base & Ent. Services
Ent. Services only
IP Base & Ent. Services
IP Base & Ent Services only
LAN Base, IP Base & Ent Services
Feature Not Supported
Feature Not Supported
Cisco IOS Software Release Strategy for Cisco IOS XE Software Release 3.2.0SG and Cisco IOS Software Release 15.0(2)SG
Cisco IOS Software Release 15 provides a more consistent user experience resulting from the evolution of Cisco's software development model. This new model accelerates the sharing of features and applications, improves IOS software quality and enables Borderless Network Services. There are no special memory requirements to upgrade from Release 12.2 to Release 15 on Cisco Catalysts 4500 & 4900 products and the same software update policy is applicable for Cisco Catalysts 4500E & 4500 products as below:
The Release 15.0(2)SG inherits features from Releases 12.2(54)SG and introduces new software and hardware features as described above. Cisco IOS Software Release 15.0(2)SG is the last major release to support classic Catalyst switches such as Cisco Catalyst 4500 Series Supervisor Engine V-10GE, Cisco Catalyst 4500 Supervisor Engine V, Cisco 4500 Supervisor Engine IV, Cisco Catalyst 4500 Series Supervisor II-Plus-10GE, Cisco Catalyst 4500 Series Supervisor Engine II-Plus-TS, Cisco 4500 Series Supervisor Engine II-Plus and Cisco Catalyst 4948, Cisco Catalyst 4948-10GE and Cisco Catalyst 4928-10GE and Cisco ME 4900 Series Ethernet Switches.
Cisco IOS Software Release 15.0(2)SG and Cisco IOS XE Software Release 3.2.0SG are the base releases for new extended maintenance trains. Figure 2 shows the software release trains for Cisco IOS Software Release 15.0(2)SG.