Figure 4 illustrates a switch stack configured with
GigaStack GBICs operating in full-duplex mode. In this
configuration, the Catalyst 3508G XL Gigabit Ethernet
switch creates a 5-Gbps independent stack backplane across
the member switches. Fault tolerance is implemented via a
redundantCatalyst3508G XLaggregationswitch. High-speed
uplinks from the Catalyst 3508G XL to the network core
are provided via Gigabit EtherChannel technology.
Figure 4 Full-Duplex GigaStack Star Configuration
Full Compatibility with Cisco Switch Clustering
Management Technology
Users can choose to deploy GigaStack stacking while
benefiting from the powerful multidevice management
technology available in Cisco Switch Clustering technology.
Switch Clustering technology allows customers to manage
a stackofdeviceswithina wiring closet or abroadlydispersed
set of devices across a campus as a single IP entity. Switch
Clustering technology uses standard TCP/IP packets to
distributeandcollectmanagementinformationforallswitches
in the cluster. Switch Clustering supports a broad range of
physical interconnections, including the GigaStack GBIC.
Key Features/Benefits
• Delivers a hardware-based, independent stack bus with
1-Gbps forwarding bandwidth in a half-duplex, cascade
configuration, or up to a 2-Gbps forwarding rate in a
point-to-point, full-duplex configuration
• Allows up to nine switches to be interconnected in a
half-duplex, cascade stack configuration, forming a highly
scalable 1-Gbps independent stack bus
• When deployed in full-duplex in combination with a
Catalyst 3508G XL Gigabit Ethernet aggregation switch,
provides a 5-Gbps independent stack backplane across
stack member switches
• Standard GBIC form factor provides customers
unprecedented flexibility in installation and deployment
• Offers many redundancy and resiliency options to ensure
network availability
• Delivers a hardware-based stacking solution to Catalyst
3500seriesXLswitches and gigabit-enabledCatalyst2900
series XL switches
• Full-/half-duplexautonegotiatingautomatically selectsand
optimizes bandwidth between interconnected switches
Technical Specifications
Performance
• 1 Gbps in half-duplex, cascade configuration; 2 Gbps in
point-to-point, full-duplex configuration
Supported Products
• Catalyst 2912MF XL
• Catalyst 2924M XL
• Catalyst 3508G XL
• Catalyst 3512 XL
• Catalyst 3524 XL
• Catalyst 3548 XL
Standards
• IEEE 802.3z, IEEE 802.3x 1000BASE-X half/full-duplex
specification
Y2K
• Y2K compliant
Connectors and Cabling
• Switch connection: GBIC-compliant connector
• Stacking connection: copper-based Cisco GigaStack
cabling
Catalyst 3500
Series XL
Catalyst 3500
Series XL
Catalyst 3500
Series XL
Catalyst 3500
Series XL
Catalyst 3500
Series XL
GigaStack GBIC
1
2
Point to Point at
2-Gbps Forwarding Rate
Catalyst 3508G XL
Gigabit Ethernet or
Gigabit EtherChannel Uplinks
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