Cisco 6000 series User Manual

For more information on HSRP, see the Implementing HSRP module of IP Addresses and Services
Configuration Guide.
Duplex Mode on Fast Ethernet Interfaces
Fast Ethernet ports support the duplex transmission type. Full-duplex mode enables the simultaneous data
transmission between a sending station and a receiving station, while half-duplex mode enables data
transmission in only one direction at a time.
When configuring duplex mode on a Fast Ethernet interface, keep the following in mind:
• If auto-negotiation is enabled on the interface, the default is duplex negotiated.
• If auto-negotiation is disabled on the interface, the default is full-duplex.
You can configure duplex mode on Fast Ethernet interfaces only. Gigabit Ethernet and 10-Gigabit Ethernet
interfaces always run in full-duplex mode.
Note
Fast Ethernet Interface Speed
You can configure the interface speed on Fast Ethernet interfaces. Keep the following in mind when configuring
the speed for a Fast Ethernet interface:
• If auto-negotiation is enabled on an interface, the default is speed negotiated.
• If auto-negotiation is disabled on an interface, the default speed is the maximum speed allowed on the
interface.
Both ends of a link must have the same interface speed. A manually configured interface speed overrides any
auto-negotiated speed, which can prevent a link from coming up if the configured interface speed at one end
of a link is different from the interface speed on the other end.
Note
Link Autonegotiation on Ethernet Interfaces
Link autonegotiation ensures that devices that share a link segment are automatically configured with the
highest performance mode of interoperation. Use the negotiation auto command in interface configuration
mode to enable link autonegotiation on an Ethernet interface. On line card Ethernet interfaces, link
autonegotiation is disabled by default.
The negotiation auto command is available on Gigabit Ethernet and Fast Ethernet interfaces only.
Note
This table describes the performance of the system for different combinations of the duplex and speed modes.
The specified duplex command configured with the specified speed command produces the resulting system
action, provided that you have configured autonegotiation on the interface.
Interface and Hardware Component Configuration Guide for Cisco NCS 6000 Series Routers, IOS XR Release 6.4.x
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Configuring Ethernet Interfaces
Duplex Mode on Fast Ethernet Interfaces

Cisco 6000 series Specifications

General

Category	Network Router
Model	Cisco 6000 series
Routing Protocols	BGP, OSPF, EIGRP, IS-IS, RIP
Interfaces	Gigabit Ethernet, 10 Gigabit Ethernet
Ports	Varies by model
Power Supply	Redundant power supply options
Dimensions	Varies by model
Weight	Varies by model
Redundancy	Power supplies, fans, route processors
Operating System	Cisco IOS