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JUNOS 10.1 Network Interfaces Configuration Guide
NOTE: Channelized OC48/STM16 IQE interfaces in M Series, MX Series, and T Series
routers reserve channels 0 through 3 of each OC12 space for STS3C SONET channels.
When you configure E3 or T3 channels in OC12 spaces on the described PICs, the
JUNOS Software allocates them starting from channel 4 because channels 0 through
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 the JUNOS Software then allocate channel 0
through 3 space for further E3 or T3 channels; thereby using up the 0 through 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 through 6 or 7 through 9 with an OC3 SONET channel; the configuration
fails because the channel 0 through 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 through 3.
Example: Configuring T3 Interfaces
Configure a T3 interface using partition 3 and OC slice 3. This configuration creates
interface
For a full configuration example, see the JUNOS Feature Guide.
Configuring T1 Interfaces
To configure T1 interfaces on a Channelized OC48 IQE PIC, perform the following
tasks:
1.
2.
418
Configuring Channelized OC48/STM16 IQE Interfaces in SONET Mode
t3-1/1/0:3
:
[edit interfaces coc48-1/1/0]
partition 3 oc-slice 3 interface-type coc1;
[edit interfaces coc1-1/1/0:3]
no-partition interface-type t3;
Partition the channelized OC48 IQE interface into channelized OC1 interfaces
by including the
partition
[edit interfaces coc48-fpc/pic/port]
type:
[edit interfaces coc48-fpc/pic/port]
partition partition-number oc-slice oc-slice-range interface-type coc1;
If your network equipment uses VT mapping, partition the channelized OC1
interface into T1 interfaces by including the
at the
[edit interfaces coc1-fpc/pic/port]
type:
,
, and
oc-slice
interface-type
hierarchy level, specifying the
partition
hierarchy level, specifying the
statements at the
coc1
interface
and
statements
interface-type
t1
interface
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