R2511-HP MSR Router Series Interface Configuration Guide(V5)

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You might need to shut down and then bring up an Ethernet interface or subinterface to activate some
configuration changes, for example, the speed or duplex mode changes.
To shut down an Ethernet interface or subinterface:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter Ethernet interface
or subinterface view, or
port group view.
• Enter Ethernet interface view:
interface interface-type
interface-number
• Enter port group view:
port-group manual
port-group-name
• Enter Ethernet subinterface view:
interface interface-type
interface-number.subnumber
Use one of the commands.
To shut down an Ethernet interface or
subinterface, enter Ethernet interface
or subinterface view. To shut down all
Ethernet interfaces in a port group,
enter port group view.
3. Shut down the Ethernet
interface or subinterface.
shutdown
By default, Ethernet interfaces and
subinterfaces are up.
Configuring flow control on an Ethernet interface
To avoid packet drops on a link, you can enable flow control at both ends of the link. When traffic
congestion occurs at the receiving end, the receiving end sends a flow control (Pause) frame to ask the
sending end to suspend sending packets
With the flow-control command configured, an interface can both send and receive flow control frames:
When congested, the interface sends a flow control frame to its peer. Upon receiving a flow control
frame from the peer, the interface suspends sending packets.
To implement flow control on an Ethernet interface, the peer router must be able to process pause frames.
To enable flow control on an Ethernet interface:
Step Command
1. Enter system view.
system-view
2. Enter Ethernet interface view.
interface interface-type interface-number
3. Enable flow control.
flow-control
Configuring physical state change suppression on an Ethernet
interface
The following matrix shows the feature and router compatibility:
Feature MSR900 MSR93X MSR20-1X MSR20 MSR30 MSR50 MSR1000