Cisco 2912mf xl 数据表

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Cisco Systems
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Flexible Stacking with the GigaStack GBIC
Gigabit Ethernet-enabled Catalyst 2900 Series XL
switches and Catalyst 3500 Series XL can be stacked
using the low-cost two-port Cisco GigaStack GBIC,
which offers a range of highly flexible stacking and
performance options. Customers can deploy a 1-Gbps
independent stack backplane in a cascade configuration,
or scale up to 5-Gbps of bandwidth in a star configuration
using the Catalyst 3508G XL Gigabit Ethernet
aggregation switch. Network managers may use one or
both of the available GBIC ports on a Gigabit
Ethernet-enabled Catalyst 2900 Series XL switch to create
high-speed uplinks to the network core, using standard
Gigabit Ethernet or Gigabit EtherChannel technology.
High resiliency can also be implemented by deploying
dual Gigabit Ethernet uplinks, a redundant GigaStack
loopback cable, Cisco Uplink Fast and Cross-stack
Uplink Fast technologies for high-speed uplink and stack
interconnection failover, and PVST+ (Per VLAN
Spanning Tree) for uplink load balancing.
Cisco Switch Clustering
Breakthrough Cisco Switch Clustering technology
enables up to 16 interconnected Catalyst 3500 XL,
2900 XL, and Catalyst 1900 switches, regardless of
geographic proximity, to form a single IP management
domain. Switch Clustering supports a broad range of
standards-based connectivity options and configurations
to deliver levels of performance that are scalable to meet
customer requirements. Switch Clustering connectivity
options for the Catalyst 2900 Series XL include Ethernet,
Fast Ethernet, Fast EtherChannel ports, low-cost
Cisco GigaStack GBIC, Gigabit Ethernet, and Gigabit
EtherChannel ports. Because the technology is not limited
by proprietary stacking modules and stacking cables,
Cisco Switch Clustering expands the traditional stacking
domain beyond a single wiring closet and lets users mix
and match interconnections to meet specific management,
performance, and cost requirements.
A command switch, either a Catalyst 2900 XL or 3500
XL, provides the proxy and redirection services for single
IP address management for each cluster. All cluster
management commands are targeted to the command
switch IP address. For redundancy, a second switch can
be assigned an IP address, and the overall cluster can
then be managed using a single virtual IP address. If the
primary command switch fails, the backup or secondary
command switch seamlessly takes over the management
of the cluster while a user still accesses the cluster via the
virtual IP address.
Cisco Switch Clustering can be accessed via Cisco Cluster
Management Suite (CMS), a Web-based management
interface, which allows network administrators to
configure, monitor, and manage a switch from anywhere
on the network through a standard browser such as
Microsoft Internet Explorer or Netscape Navigator.
Network administrators simply point their Web-browsers
to the IP address of the cluster Command switch and
access all management capabilities. The CMS interface
is launched from the switch itself and delivers simple,
cluster-wide, device-level management, including port
configuration, VLAN setup, network views, and port
monitoring—all from a single graphical interface.
Web-based management is an integral part of the Cisco
Switch Clustering architecture, allowing users to easily
configure and manage stacks and switch clusters, and
administer software upgrades across multiple switches.
Command switch and cluster management redundancy
are ensured via an automatic failover scheme in the rare
event of a command switch failure.
Figure 1
Catalyst 2924M XL 10/100 Autosensing Fast
Ethernet Switch
Figure 2
Catalyst 2912MF XL 100Base-FX Fast Ethernet
Aggregation Switch