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speed (MX Series DPC)



Hierarchy Level

Release Information

Statement introduced in Junos OS Release 9.5.


On MX Series routers with Combo Line Rate DPCs and Tri-Rate Copper SFPs you can set auto negotiation of speed. To specify the auto negotiation speed, use the speed (auto | 1Gbps | 100Mbps | 10Mbps) statement under the [edit interface ge-/fpc/pic/port] hierarchy level. The auto option will attempt to automatically match the rate of the connected interface. To set port speed negotiation to a specific rate, set the port speed to 1Gbps, 100Mbps, or 10Mbps.


If the negotiated speed and the interface speed do not match, the link will not be brought up. Half duplex mode is not supported.


You can specify the speed as either auto (autonegotiate), 10Mbps (10 Mbps), 100Mbps (100 Mbps), or 1Gbps (1 Gbps).

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.