Juniper JUNOS 10.1 - CONFIGURATION GUIDE 1-2010 Configuration Manual page 506

JUNOS 10.1 Network Interfaces Configuration Guide
This configuration creates interface
Then, include the
coc1-fpc/pic/port:channel]
This configuration creates interface
The partition number is the sublevel interface partition index and is correlated with
the channel number. For channelized OC1 interfaces, the partition number can be
from 1 through 12.
NOTE: For channelized OC12 interfaces, channel numbering begins with 0 (:0). For
channelized OC12/STM4 IQ and IQE interfaces, channel numbering begins with 1
(:1).
The OC-slice range is the range of SONET/SDH slices. For SONET/SDH interfaces,
the OC-slice range specifies the bandwidth size required for the interface type you
are configuring. For channelized OC1 interfaces, the OC slice can be from
1 through 12. You can configure only one OC slice per channelized OC1 interface.
The interface type is the channelized interface type or clear channel you are creating.
For channelized OC12 interfaces,
NOTE: Channelized OC12/STM4 IQ and IQE interfaces in M Series, MX Series, and
T Series routers reserve channels 0-3 of each OC12 space for STS3C SONET channels.
When you configure E3 or T3 channels in OC12 spaces on the described PICs, JUNOS
Software allocates them starting from channel 4 because channels 0-3 are reserved
for four STS3c SONET channels. Channel numbers are allocated sequentially in the
following order: 4, 5, 6, 7, 8, 9, 11, 0, 1, 2, 3.
Only after channels 4 through 11 of the OC12 space are exhausted (all 4 through 11
configured) for E3 or T3 channels will JUNOS Software then allocate channel 0-3
space for further E3 or T3 channels; thereby using up the 0-3 space previously
reserved for four STS3c SONET channels.
If a subsequent reconfiguration of this OC12 space occurs, where you try to replace
channels 4-6 or 7-9 with an OC3 SONET channel; it fails because the channel 0-3
space is already occupied by the last E3 or T3 channels configured. This causes a
failure in channel allocation and the Device Control Daemon (DCD) keeps retrying
forever to configure the channel allocation on the interface. The only resolution is
to reconfigure the last configured E3/T3 channels with OC3 channels, to free channels
0-3.
436
Configuring Channelized OC12/STM4 IQ and IQE Interfaces (SONET Mode)
no-partition interface-type
hierarchy level, specifying the
[edit interfaces coc1-fpc/pic/port:channel]
no-partition interface-type t3;
coc1-fpc/pic/port:channel
statement at the
t3
.
t3-fpc/pic/port:channel
can be so or coc1 .
type
.
[edit interfaces
interface type: