Cisco WS-SUP720= - Supervisor Engine 720, Catalyst 6500 series, Supervisor Engine 720 Configuration Manual
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Configuring a Supervisor Engine 720
This chapter describes how to configure a Supervisor Engine 720 in a Catalyst 6500 series switch. This
chapter contains these sections:
• Using the Bootflash or Bootdisk on a Supervisor Engine 720, page 4-2
• Using the Slots on a Supervisor Engine 720, page 4-2
• Configuring Supervisor Engine 720 Ports, page 4-2
• Configuring and Monitoring the Switch Fabric Functionality, page 4-2
Note • For complete syntax and usage information for the commands used in this chapter, refer to the Cisco
IOS Master Command List, Release 12.2SX at this URL:
http://www.cisco.com/en/US/docs/ios/mcl/122sxmcl/12_2sx_mcl_book.html
• With a 3-slot chassis, install the Supervisor Engine 720 in either slot 1 or 2.
• With a 6-slot or a 9-slot chassis, install the Supervisor Engine 720 in either slot 5 or 6.
• With a 13-slot chassis, install the Supervisor Engine 720 in either slot 7 or 8.
Tip For additional information about Cisco Catalyst 6500 Series Switches (including configuration examples
and troubleshooting information), see the documents listed on this page:
http://www.cisco.com/en/US/products/hw/switches/ps708/tsd_products_support_series_home.html
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Chapter 4 Configuring a Supervisor Engine 720
Using the Bootflash or Bootdisk on a Supervisor Engine 720
Using the Bootflash or Bootdisk on a Supervisor Engine 720
All 12.2SX releases support the Supervisor Engine 720 64-MB bootflash device (sup-bootflash:).
Release 12.2(18)SXE5 and rebuilds and Release 12.2(18)SXF and rebuilds support WS-CF-UPG=,
which replaces the bootflash device with a CompactFlash adapter and 512 MB CompactFlash card
(sup-bootdisk:). Refer to this publication:
http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/hardware/Config_Notes/78_17277.html
Using the Slots on a Supervisor Engine 720
The Supervisor Engine 720 has two CompactFlash Type II slots. The CompactFlash Type II slots
support CompactFlash Type II Flash PC cards sold by Cisco Systems, Inc. The keywords for the slots on
the active Supervisor Engine 720 are disk0: and disk1:. The keywords for the slots on a redundant
Supervisor Engine 720 are slavedisk0: and slavedisk1:.
Configuring Supervisor Engine 720 Ports
Supervisor Engine 720 port 1 has a small form-factor pluggable (SFP) connector and has no unique
configuration options.
Supervisor Engine 720 port 2 has an RJ-45 connector and an SFP connector (default). To use the RJ-45
connector, you must change the configuration.
To configure port 2 on a Supervisor Engine 720 to use either the RJ-45 connector or the SFP connector,
perform this task:
Command Purpose
Step 1
Step 2
Router(config)# interface gigabitethernet slot/2
Router(config-if)# media-type {rj45 | sfp}
Router(config-if)# no media-type
This example shows how to configure port 2 on a Supervisor Engine 720 in slot 5 to use the RJ-45
connector:
Router(config)# interface gigabitethernet 5/2
Router(config-if)# media-type rj45
Selects the Ethernet port to be configured.
Selects the connector to use.
Reverts to the default configuration (SFP).
Configuring and Monitoring the Switch Fabric Functionality
These sections describe how to configure the switching mode and monitor the switch fabric functionality
that is included on a Supervisor Engine 720:
• Understanding How the Switch Fabric Functionality Works, page 4-3
• Configuring the Switch Fabric Functionality, page 4-4
• Monitoring the Switch Fabric Functionality, page 4-4
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Configuring and Monitoring the Switch Fabric Functionality
Understanding How the Switch Fabric Functionality Works
These sections describe how the switch fabric functionality works:
• Switch Fabric Functionality Overview, page 4-3
• Forwarding Decisions for Layer 3-Switched Traffic, page 4-3
• Switching Modes, page 4-3
Switch Fabric Functionality Overview
The switch fabric functionality is built into the Supervisor Engine 720 and creates a dedicated
connection between fabric-enabled modules and provides uninterrupted transmission of frames between
these modules. In addition to the direct connection between fabric-enabled modules provided by the
switch fabric funtionality, fabric-enabled modules also have a direct connection to the 32-Gbps
forwarding bus.
Forwarding Decisions for Layer 3-Switched Traffic
Switching Modes
Either a PFC3 or a Distributed Feature Card 3 (DFC3) makes the forwarding decision for Layer
3-switched traffic as follows:
• A PFC3 makes all forwarding decisions for each packet that enters the switch through a module
without a DFC3.
• A DFC3 makes all forwarding decisions for each packet that enters the switch on a DFC3-enabled
module in these situations:
–
If the egress port is on the same module as the ingress port, the DFC3 forwards the packet
locally (the packet never leaves the module).
–
If the egress port is on a different fabric-enabled module, the DFC3 sends the packet to the
egress module, which sends it out the egress port.
–
If the egress port is on a different nonfabric-enabled module, the DFC3 sends the packet to the
Supervisor Engine 720. The Supervisor Engine 720 fabric interface transfers the packet to the
32-Gbps switching bus where it is received by the egress module and is sent out the egress port.
With a Supervisor Engine 720, traffic is forwarded to and from modules in one of the following modes:
• Compact mode—The switch uses this mode for all traffic when only fabric-enabled modules are
installed. In this mode, a compact version of the DBus header is forwarded over the switch fabric
channel, which provides the best possible performance.
• Truncated mode—The switch uses this mode for traffic between fabric-enabled modules when there
are both fabric-enabled and nonfabric-enabled modules installed. In this mode, the switch sends a
truncated version of the traffic (the first 64 bytes of the frame) over the switch fabric channel.
• Bus mode (also called flow-through mode)—The switch uses this mode for traffic between
nonfabric-enabled modules and for traffic between a nonfabric-enabled module and a fabric-enabled
module. In this mode, all traffic passes between the local bus and the supervisor engine bus.
Table 4-1 shows the switching modes used with fabric-enabled and nonfabric-enabled modules installed.
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