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Management Ethernet Interface on M-series and T-series Routing Platforms

By default, the M-series and T-series routing platforms management Ethernet interface, fxp0, autonegotiates whether to operate at 10 megabits per second (Mbps) or 100 Mbps. All other interfaces automatically choose the correct speed based on the PIC type and whether the PIC is configured to operate in multiplexed mode (using the no-concatenate statement in the [edit chassis] configuration hierarchy, as described in the JUNOS System Basics Configuration Guide).

To configure the management Ethernet interface to operate at 10 Mbps or 100 Mbps, include the speed statement at the [edit interfaces fxp0] hierarchy level:

[edit interfaces fxp0]
speed (10m | 100m);

For information about configuring the link mode, see Configuring the Link Characteristics.

Note: The fxp0 interface does not support CoS.


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