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

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Step Command Remarks
3. Set the interface description.
description text
Optional.
By default, the description of a
POS interface is interface name
Interface, for example, Pos2/0
Interface.
4. Set the clock mode.
clock { master | slave }
Optional.
The default is slave.
5. Set the CRC length.
crc { 16 | 32 }
Optional.
The default is 32 bits.
6. Set the loopback mode.
loopback { local | remote }
Optional.
Loopback is disabled by default.
7. Configure the overhead bytes.
• flag c2 flag-value
• flag { j0 | j1 } { sdh | sonet }
flag-value
Optional.
By default:
• The C2 overhead byte is
hexadecimal 16.
• SDH framing applies. In SDH
framing, both J0 and J1
overhead bytes are null. In
SONET framing, the J0
overhead byte is 0x01 and J1
overhead byte is null.
8. Set the framing format.
frame-format { sdh | sonet }
Optional.
The default is SDH.
9. Configure scrambling.
scramble
Optional.
Scrambling is enabled by default.
10. Set the link type.
link-protocol { fr [ ietf | mfr
interface-number | nonstandard ]
| hdlc | ppp }
Optional.
The default is PPP.
11. Set the interface MTU.
mtu size
Optional.
By default, the MTU is in the range
of 128 to 1650 bytes.
12. Set the intended bandwidth
for the POS interface.
bandwidth bandwidth-value Optional.
13. Restore the default settings for
the POS interface.
default Optional.
14. Shut down and bring up the
POS interface.
shutdown
undo shutdown
Optional.
By default, a POS interface is up.
For the settings to take effect, you
must perform this step.
If no cable is connected to the
interface, shut down the interface
to prevent interface exceptions.