Configuring Junos OS to Enable SONET/SDH Framing for ATM MICs
In Junos OS Release 12.1 and later, the ATM MIC enables support for ATM pseudowire on MX Series routers. ATM MICs are rate-selectable at the following rates: 2-port OC12 or 8-port OC3. The MICs are supported on MPC interfaces. Hot-pluggable SFPs are used as optical transponders. The MICs allow the user to configure both the mode and the speed. The ATM MIC (2-port OC12 and the 8-port OC3) with SFP installed support SONET or SDH framing on a per-port or per-PIC basis. To enable the entire MIC to function in either SONET or SDH mode, you can configure framing at the MIC level. To enable the framing on a port-by-port basis, you can configure framing at the port level.
 | Note: This topic uses the term PIC for ATM MICs and the term FPC for MPC where the reference is to a CLI or Junos OS entity. |
By default, ATM MICs use SONET
framing. For a discussion of the differences between the two standards,
see the Junos
OS SONET/SDH Interfaces Configuration Guide 
.
To configure the MIC to use SDH framing on a per-PIC basis:
- At the [edit chassis] hierarchy level in configuration
mode, specify the PIC and the framing mode to be configured.[edit chassis]user@host# set fpc fpc-slot pic pic-number framing sdh;
For example:
[edit chassis]user@host# set fpc 2 pic 0 framing sdh; - Verify the configuration.
[edit chassis] user@host# show fpc 2 { pic 0 { framing sdh; } }
To configure the MIC to use SDH framing on a per-port basis:
- At the [edit chassis] hierarchy level in configuration
mode, specify the PIC, port number, and the framing mode to be configured.[edit chassis]user@host# set fpc fpc-slot pic pic-number port port-number framing sdh;
For example:
[edit chassis]user@host# set fpc 2 pic 0 port 0 framing sdh; - Verify the configuration.
[edit chassis] user@host# show fpc 2 { pic 0 { port 0 { framing sdh; } } }
