Cisco IOS Software for the Cisco Catalyst 4500 Series Supervisor Engines S45IPBK9-12244SG= Manuel D’Utilisation
Codes de produits
S45IPBK9-12244SG=
Product Bulletin
© 2008 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
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New Features
The following new features of Cisco IOS Software Release 12.2(44)SG are applicable to all
supervisor engines and 49xx fixed-configuration systems, unless otherwise stated.
X2 Link Debounce
10GBase links on supervisor engines go down if a link error as short as 3 msec occurs. In noisy
networks, such errors can cause link flaps. Link Debounce avoids these flaps on 10GBase
interfaces by ignoring link errors shorter than a configurable value.
Manageability
IP SLA
IP SLA is embedded in Cisco IOS Software for active monitoring. IP SLA generates and analyzes
the traffic to measure performance between Cisco IOS Software devices or between Cisco IOS
Software devices and network application servers. IP SLA offers a unique set of performance
measurements, typically for voice-over-IP (VoIP) deployment: network delay or latency, packet
loss, network delay variation (jitter), availability, one-way latency, Website download time, as well
as other network statistics. IP SLA can be used to measure network health, verify service level
agreements, assist with network troubleshooting, and plan network infrastructure. IP SLA provides
a scalable and cost-effective solution for IP service level monitoring and eliminates the deployment
of dedicated active monitoring devices by including the "probe" capabilities within Cisco IOS
Software.
Note:
The IP SLA feature is only present in the entservices image.
802.1ab LLDP
LLDP is a link-layer protocol. Unlike the Cisco proprietary Cisco Discovery Protocol, LLDP is a
multivendor standardized protocol based on IEEE 802.1ab standard. LLDP utilizes a defined
Multicast MAC address (01-80-C2-00-00-0E) as destination address. The ethertype is 88-CC.
Information about the endpoints is sent as type length values (TLVs). LLDP packets are sent to the
neighbors periodically. LLDP can operate in transmit only or receive only mode. The receiving of
LLDP packets is implemented by capturing the packet in hardware, using the L2 destination ACL
and forwarding it to the CPU.
802.1ab Partial LLDP-MED
LLDP-MED extends the standard to specifically focus on the needs of VoIP to allow simplified
provisioning, ease of administration, and several valuable new discovery capabilities. The new
LLDP-MED standard enables the following primary values:
●
Auto-discovery of quality of service LAN policies (such as VLAN, Layer 2 priority, and
diffserv settings), leading to "plug and play" VoIP networking
●
Device location discovery, critical to reporting location of the end user in emergency calling
and other location-dependant applications, as well as maintaining integrity of the location
database
●
Extended and automated power management of PoE endpoints, including fine-grained
power budgeting and priority settings
●
Inventory management, allowing network administrators to track their VoIP devices and
determine their characteristics (manufacturer, software and hardware versions, serial/asset
number)