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PRODUCT BULLETIN NO. 2775
CISCO IOS SOFTWARE RELEASE 12.2(25)EWA FOR
CISCO CATALYST 4500 SERIES SUPERVISOR ENGINES
CISCO CATALYST 4500 SERIES SUPERVISOR ENGINES
This product bulletin lists the hardware and software features supported by Cisco IOS Software Release 12.2(25)EWA for
the Cisco Catalyst 4000/4500 Series Supervisor Engine II-Plus, Catalyst 4500 Series Supervisor Engine II-Plus-TS, Catalyst
4000/4500 Supervisor Engine IV, Catalyst 4000/4500 Supervisor Engine V, and Catalyst 4500 Series Supervisor Engine
V-10GE.
Cisco IOS Software Release 12.2(25)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(25)EWA SUPPORT
New Software Features
Per-Port Per-VLAN Quality of Service
Per-port per-VLAN quality of service (QoS) offers differentiated QoSs to individual VLANs on a trunk or access port. It allows service providers to
rate limit individual VLAN-based services on each trunk port to a business or a residence. In an enterprise voice over IP (VoIP) environment, it can
be used to rate limit the voice VLAN on an access port even if a network intruder impersonates an IP phone. Per-port per-VLAN service policy can
be separately applied to either ingress or egress traffic.
Trunk-Port Security
Trunk-port security extends the port security to trunk ports on a per-VLAN basis. It restricts the allowed MAC addresses or the maximum number of
MAC addresses to individual VLANs on a trunk port. Trunk-port security enables service providers to block the access from a station with a
different MAC address than the ones specified for that VLAN on that trunk port. When a trunk-port security violation occurs, the trunk port is either
shut down, or a Simple Network Management Protocol (SNMP) trap is generated. Trunk-port security is also supported on private VLAN trunk
ports.
NetFlow Bridged IP Flow
NetFlow is traditionally used to collect and export routed IP flows. In a Layer 2 access environment, IP traffic is typically switched within a VLAN.
The NetFlow bridged IP flow feature extends Cisco
®
Catalyst
®
4500 NetFlow capability by creating, tracking, and exporting Layer 2 bridged IP
flows in hardware at wire rate. It is activated along with routed IP flows through switch global configuration. For the Catalyst 4500 Series
Supervisor Engine V-10GE, the NetFlow bridged IP flow feature extends User-Based Rate Limiting (UBRL) to bridged IP flows. The Catalyst 4500
Series Supervisor Engine V-10GE can now dynamically learn Layer 2 to 4 IP traffic flows and rate limit each unique routed or bridged IP flow to an
individual rate. For Catalyst 4000/4500 supervisor engines IV and V, the NetFlow services daughter card is required to collect and export all Layer 2
to 4 IP flows.
802.1x Private VLAN Assignment
The 802.1x private VLAN assignment feature extends 802.1x VLAN assignment to the private VLAN environment for Layer 2 isolation. When a
port is configured as a private VLAN host port, 802.1x private VLAN assignment authorizes a user to a specified secondary private VLAN. This
feature can not be enabled concurrently on a port with a voice VLAN.