Справочник Пользователя для Cisco IOS Software for Cisco Catalyst 4900 Series Switches S49ESK9-12246SG=
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S49ESK9-12246SG=
Product Bulletin
© 2008 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
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Hardware Features
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Cisco Catalyst 4928-10GE Ethernet Switch
This release introduces a new member of the Cisco Catalyst 4900 Series of fixed-
configuration switches. The Cisco Catalyst 4928-10GE was designed from the beginning to
meet the needs of space-constrained distribution/core networks in the enterprise or branch
LAN. The Cisco Catalyst 4928-10GE has 28 Gigabit Ethernet (Small Form-Factor
Pluggable [SFP]) and two 10 Gigabit Ethernet (X2) wire-rate ports. This new switch is 1 RU
and features 1+1 redundant internal AC or DC power supplies and a hot swappable fan
tray. It will run the same image as the Cisco Catalyst 4900 Series Switches.
This offers the same features as the Cisco Catalyst 4948 switches and classic supervisors.
Product number: WS-C4928-10GE
Description: Cisco Catalyst 4928-10GE Switch, optional software image, optional power
supplies, fan tray
Shipping: August 2008
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Cisco Catalyst 4900M Switch
The Cisco Catalyst 4900M Switch is part of the Cisco data center switching portfolio. The
Cisco Catalyst 4900 Series Switches are designed as a top-of-rack access layer switch for
use with rack-optimized servers. It is unique in the top-of-rack space because it is
semifixed. This flexibility provides a cost-effective and modular migration path from Gigabit
Ethernet to 10 Gigabit Ethernet. This release will support the Cisco Catalyst 4900M Switch.
Previously there was a separate release for the Cisco Catalyst 4900M Switch (for example,
Release 12.2(40)XO).
Note:
Before Release 12.2(46)SG, the Cisco Catalyst 4900M platform was only
supported in Release 12.2(40)XO, a short-lived special train that was introduced to support
the new Cisco Catalyst 4900M platform. With Release 12.2(46)SG, it is highly
recommended that customers who are running Release 12.2(40)XO should migrate to
Release 12.2(46)SG for new features and bug fixes. As of Release 12.2(46)SG the Cisco
Catalyst 4900M platform will share a common software release with classic and 6-E
supervisor engines.
Software Features
Consult Table 1 to see platform support for the following features.
FlexLinks and FlexLinks+ with VLAN load balancing and MAC address-table move update
(MMU):
FlexLinks provides Layer 2 redundancy without requiring Spanning Tree Protocol. FlexLinks is
applicable in the following scenarios:
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Top-of-rack data center access switch dual connected to the aggregation
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Metro access switch dual connected to aggregation
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Wiring closet switch dual connected to the distribution
FlexLinks+ allows link-level protection between switches. The protected links are kept at active
state, and traffic is load balanced based on VLAN. In case of a link failure, the VLANs switch over
to the standby link.