R0106-HP MSR Router Series Interface Command Reference(V7)

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Predefined user roles
network-admin
Parameters
dsu-mode: Specifies the FE3 (Fractional E3) DSU mode for a CE3 interface operating in FE3 mode. This
keyword can be followed by 0 or 1.
0: Specifies the Digital Link mode, where the subrate is a multiple of 358 kbps and is in the range of 358
to 34010 kbps (up to 95 rate levels are available).
1: Specifies the Kentrox mode, where the subrate is a multiple of 500 kbps and is in the range of 500 to
24500 kbps. In this mode, the subrate can also be 34010 kbps (making a total of 50 rate levels).
subrate number: Specifies the subrate for the CE3 interface. The number argument is in the range of 1
to 34010 (in kbps).
Usage guidelines
FE3 mode is a non-standard E3 application mode. In this mode, the subrate level setting varies by vendor.
You can use the fe3 command to make the device compatible with devices of other vendors operating in
specific FE3 DSU modes.
This command is applicable only to CE3 boards that support FE3.
This command is available only in E3 mode.
After you set the subrate by using the fe3 subrate command, the CE3 interface searches the subrate
levels corresponding to the DSU mode in which it is operating. The CE3 interface selects the subrate level
that is closest to that set by the fe3 subrate command as its subrate. The device adjusts the hardware to
allow for the subrate.
You can use the display interface serial interface-number:0 command to check the DSU mode setting,
the subrate, the actual rate, and the baud rate of a CE3 interface. The actual rate does not include the
overhead bits. The baud rate is the actual E3 line rate (34368 kbps), with the overhead bits counted in.
Examples
# Configure E3 2/4/0 to operate in FE3 mode. Set the DSU mode to 1 and the subrate to 3000 kbps.
<Sysname> system-view
[Sysname] controller e3 2/4/0
[Sysname-E3 2/4/0] using e3
[Sysname-E3 2/4/0] fe3 dsu-mode 1
[Sysname-E3 2/4/0] fe3 subrate 3000
loopback
Use loopback to set the loopback mode of a CE3 interface.
Use undo loopback to restore the default.
Syntax
loopback { local | payload | remote }
undo loopback
Default
Loopback is disabled on a CE3 interface.