Mtu (Isdn Bri Interface) - HP MSR series Command Reference Manual

Default command level
2: System level
Parameters
b1: Places the B1 channel in external loopback.
b2: Places the B2 channel in external loopback.
both: Places both B1 and B2 channels in external loopback.
Usage guidelines
The modules with loopback-supported ISDN interfaces include 4BS (MIM), and 1BS\1BU\2BS\2BU
(SIC). In addition, loopback is also supported by the fixed ISDN interfaces on your router, if there is any.
Examples
# Place the B1 and B2 channels on interface BRI 1/0 in external loopback.
<Sysname> system-view
[Sysname] interface bri 1/0
[Sysname-Bri1/0] loopback both

mtu (ISDN BRI interface)

Use mtu to set the MTU of a BRI interface.
Use undo mtu to restore the default.
Syntax
mtu size
undo mtu
Default
The MTU of a BRI interface is 1500 bytes.
Views
ISDN BRI interface view
Default command level
2: System level
Parameters
size: Maximum transmission unit (MTU) of the current interface, in the range of 128 to 1500 bytes.
Usage guidelines
For your MTU setting to take effect, shut down and then bring up the interface with the shutdown and
undo shutdown commands.
Examples
# Set the MTU of the BRI interface BRI 1/0 to 1200 bytes.
<Sysname> system-view
[Sysname] interface bri 1/0
[Sysname-Bri1/0] mtu 1200
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