Configuring Speed And Duplex - Cisco ASR 1000 Series Software Configuration Manual

Configuring the Autonegotiation on an Interface
From a user's perspective, these settings are not really negotiated, but rather are enabled using autonegotiation.
The SFPs for Gigabit Ethernet SPAS support 1000Base-X, and the IEEE 1000Base-X standard for fiber does
not support negotiation of link speed.
To disable autonegotiation, use the following command in interface configuration mode:
Command
Router(config-if)# no negotiation auto

Configuring Speed and Duplex

When autonegotiation is turned off on Fast Ethernet or the RJ-45 interface in the 2-Port Gigabit Ethernet SPA,
you can manually specify the speed and duplex configuration.
When using the SFP-GE-T, you must configure both the speed and duplex modes.
Note
On the Cisco ASR 1002-X Router, the copper SFP port's flow control is on, regardless of the duplex
Note
setting. In contrast, on the Cisco ASR 1002 Router, the copper SFP port's flow control is off when the
duplex setting is Half.
To configure the speed for a Fast Ethernet or Gigabit Ethernet interface, use the speed command in interface
configuration mode. To return to the default setting, use the no form of this command:
Command
Router(config-if)# speed {10 | 100 | 1000}
To configure duplex operation on an interface, use the duplex command in interface configuration mode. Use
the no form of this command to return to the default value.
Command
Router(config-if)# duplex {full | half}
Configuring the Media Type
The 2-Port Gigabit Ethernet SPA supports RJ-45 and fiber ports. Use the media-type configuration command
to select either the RJ-45 or fiber media for a given port.
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide, Cisco IOS
XE Everest 16.5
128
Configuring the Ethernet SPAs
Purpose
Disables autonegotiation on Fast Ethernet or Gigabit
Ethernet SPA interfaces on the Cisco
ASR1000-SIP10. No advertisement of flow control
occurs.
Purpose
Configures the interface to transmit at 10 Mbps, 100
Mbps, or 1000 Mbps. (The 1000 keyword is only
valid for Gigabit Ethernet.)
Purpose
Specifies full- or half-duplex operation.
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