R2511-HP MSR Router Series Interface Command Reference(V5)

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Use undo mdl generate to disable the CT3 interface from sending MDL messages.
Use undo mdl data to restore the default.
Syntax
mdl { data { eic string | fic string | gen-no string | lic string | pfi string | port-no string | unit string } |
detect | generate { idle-signal | path | test-signal } }
undo mdl [ data [ eic | fic | gen-no | lic | pfi | port-no | unit ] | detect | generate [ idle-signal | path
| test-signal ] ]
Views
CT3 interface view
Default command level
2: System level
Parameters
detect: Enables/disables periodical maintenance data link (MDL) message detection.
data: Specifies the information included in MDL messages. Among all types of information, EIC, LIC, FIC,
and unit are defined for all types of MDL messages; PFI is only for path MDL messages; port number is
only for idle signal messages; and generator number is only for test signal messages.
eic string: Specifies the equipment identification code, a string of 1 to 10 characters. The system default
is line.
lic string: Specifies the location identification code, a string of 1 to 11 characters. The system default is
line.
fic string: Specifies the frame identification code, a string of 1 to 10 characters. The system default is line.
unit string: Specifies the unit, a string of 1 to 6 characters. The system default is line.
pfi string: Specifies the path facility identification, a string of 1 to 38 characters. The system default is
line.
port-no string: Specifies the port number in idle signal message, a string of 1 to 38 characters. The
system default is line.
gen-no string: Specifies the generator number, a string of 1 to 38 characters. The system default is line.
generate: Sends specified information with MDL messages, which can be path, idle signal, or test signal,
or all of them regularly.
Usage guidelines
MDL is a channel formed by using the three C-bits in the fifth subframe in C-bit framing. According to
ANSI T1.107a, it is used to transmit three types of maintenance messages, path, idle signal, and test
signal, and its data frame format is LAPD.
At the startup of your router, MDL message detection and sending are disabled on CT3 interfaces, and
the default MDL message information applies.
Examples
# Enable MDL detection on CT3 interface T3 2/0.
<Sysname> system-view
[Sysname] controller t3 2/0
[Sysname-T3 2/0] mdl detect