Technical Documentation

Example: Converting a Channelized OC12 IQ PIC to a Channelized STM4 IQ Interface

The JUNOS software allows you to convert a Channelized OC12 IQ PIC into a channelized STM4 IQ interface. The conversion process enables the Channelized OC12 IQ PIC to interconnect with European SDH telecommunications equipment at the STM4 and STM1 levels, then channelize the data into North American T3, T1, and NxDS0 interfaces. To place the Channelized OC12 IQ PIC in SDH mode, include the sdh option at the [edit chassis fpc slot-number pic pic-number framing] hierarchy level.

Figure 1: Channelized OC12 IQ Interface in SDH Mode Example

Image g017233.gif

Figure 1 and the following configuration example show how the converted channelized STM4 IQ interface can be turned into a clear channel STM4 (VC4-4c) SDH interface, or further subdivided into STM1 (VC4) interfaces and channelized administrative unit 4 (CAU4) interfaces, T3 and channelized T3 interfaces, T1 and channelized T1 interfaces, and NxDS0 channels.

Router A

[edit]chassis {fpc 0 {pic 0 {framing sdh;# Converts the Channelized OC12 IQ PIC}               # into a channelized STM4 SDH interface.}}interfaces {cstm4-0/0/0 {partition 1 oc-slice 1-3 interface-type so; # Creates an STM1 SDH interface.partition 2 oc-slice 4-6 interface-type cau4; # Partitions 2, 3, and 4 createpartition 3 oc-slice 7-9 interface-type cau4; # three channelized AU4 channels.partition 4 oc-slice 10-12 interface-type cau4;}so-0/0/0:1 { # A clear channel STM1 SDH (VC4) interface.encapsulation frame-relay;unit 0 {dlci 16;family inet {address 10.0.0.1/30;}family inet6 {address abcd::10.0.0.1/126;}}}cau4-0/0/0:2 {partition 1 interface-type t3; # Creates a T3 interface from the}                  # channelized AU4 interface.t3-0/0/0:2:1 {encapsulation frame-relay;unit 0 {dlci 16;family inet {address 10.0.0.5/30;}family inet6 {address abcd::10.0.0.5/126;}}}cau4-0/0/0:3 {partition 1 interface-type ct3; # Creates channelized T3 interfaces from thepartition 2 interface-type ct3; # second channelized AU4.}ct3-0/0/0:3:1 {partition 1 interface-type t1; # Creates a T1 interface from the channelized T3.}t1-0/0/0:3:1:1 {encapsulation frame-relay;unit 0 {dlci 16;family inet {address 10.0.0.9/30;}family inet6 {address abcd::10.0.0.9/126;}}}ct3-0/0/0:3:2 {partition 1 interface-type ct1; # Creates a channelized T1 interface}                  # from the channelized T3.ct1-0/0/0:3:2:1 {partition 1 timeslots 1,3-7,24 interface-type ds; # Creates an NxDS0 channel}                  # group with seven time slots.ds-0/0/0:3:2:1:1 {encapsulation frame-relay;unit 0 {dlci 16;family inet {address 10.0.0.13/30;}family inet6 {address abcd::10.0.0.13/126;}}}cau4-0/0/0:4 {partition 2 interface-type t3; # Creates a T3 interface.partition 1 interface-type ct3; # Creates a channelized T3 interface}                  # from the channelized AU4.ct3-0/0/0:4:1 {partition 1 interface-type t1; # Creates a T1 interface.partition 2 interface-type ct1; # Creates a channelized T1 interface}                   # from the channelized T3.t1-0/0/0:4:1:1 {encapsulation frame-relay;unit 0 {dlci 16;family inet {address 10.0.0.21/30;}family inet6 {address abcd::10.0.0.21/126;}}}ct1-0/0/0:4:1:2 {partition 1 timeslots 6,8-11,7 interface-type ds; # Creates an NxDS0 channel}                 # group with six time slots.ds-0/0/0:4:1:2:1 {encapsulation frame-relay;unit 0 {dlci 16;family inet {address 10.0.0.25/30;}family inet6 {address abcd::10.0.0.25/126;}}}t3-0/0/0:4:2 {encapsulation frame-relay;unit 0 {dlci 16;family inet {address 10.0.0.17/30;}family inet6 {address abcd::10.0.0.17/126;}}}cstm4-0/1/0 {no-partition interface-type so; # Creates a clear channel SDH STM4 interface.}so-0/1/0 { # This is the clear channel SDH STM4 (VC4-4c) interface so-0/1/0.unit 0 {family inet {address 10.22.22.1/30;}}}}

Figure 2 shows a visual representation of the T3/channelized T3-to-STM4 SDH mapping method used by the JUNOS Software for channelized OC12 IQ interfaces configured in SDH mode.

Figure 2: Converted Channelized OC12 IQ Interface SDH Mapping Method

Image g017234.gif

Verifying Your Configuration

To verify correct operation of a Channelized OC12 IQ PIC converted to a channelized STM4 IQ interface, use the following commands:

  • show interfaces
  • show interfaces controller

To view the interface names of the physical channelized STM4 IQ interface and the resulting interfaces configured on the channelized IQ interface, use the show interfaces controller and show interfaces terse commands:


user@host> show interfaces controller cstm4-0/0/0
Controller                                                           Admin Link
cstm4-0/0/0                                                           up    up
     so-0/0/0:1                                                       up    up
     cau4-0/0/0:2                                                     up    up
         t3-0/0/0:2:1                                                 up    up
     cau4-0/0/0:3                                                     up    up
         ct3-0/0/0:3:1                                                up    up
             t1-0/0/0:3:1:1                                           up    up
         ct3-0/0/0:3:2                                                up    up
             ct1-0/0/0:3:2:1                                          up    up
                 ds-0/0/0:3:2:1:1                                     up    up
     cau4-0/0/0:4                                                     up    up
         ct3-0/0/0:4:1                                                up    up
             t1-0/0/0:4:1:1                                           up    up
             ct1-0/0/0:4:1:2                                          up    up
                 ds-0/0/0:4:1:2:1                                     up    up
         t3-0/0/0:4:2                                                 up    up

 


user@host> show interfaces terse *-0/0/0*
Interface               Admin Link Proto    Local                 Remote
cstm4-0/0/0             up    up
so-0/0/0:1              up    up
so-0/0/0:1.0            up    up   inet     10.0.0.1/30
                                   inet6    abcd::a00:1/126
                                            fe80::2a0:a5ff:fe5c:15a6/64
cau4-0/0/0:2            up    up
t3-0/0/0:2:1            up    up
t3-0/0/0:2:1.0          up    up   inet     10.0.0.5/30
                                   inet6    abcd::a00:5/126
                                            fe80::2a0:a5ff:fe5c:15a6/64
cau4-0/0/0:3            up    up
ct3-0/0/0:3:1           up    up
t1-0/0/0:3:1:1          up    up
t1-0/0/0:3:1:1.0        up    up   inet     10.0.0.9/30
                                   inet6    abcd::a00:9/126
                                            fe80::2a0:a5ff:fe5c:15a6/64
ct3-0/0/0:3:2           up    up
ct1-0/0/0:3:2:1         up    up
ds-0/0/0:3:2:1:1        up    up
ds-0/0/0:3:2:1:1.0      up    up   inet     10.0.0.13/30
                                   inet6    abcd::a00:d/126
                                            fe80::2a0:a5ff:fe5c:15a6/64
cau4-0/0/0:4            up    up
ct3-0/0/0:4:1           up    up
t1-0/0/0:4:1:1          up    up
t1-0/0/0:4:1:1.0        up    up   inet     10.0.0.21/30
                                   inet6    abcd::a00:15/126
                                            fe80::2a0:a5ff:fe5c:15a6/64
ct1-0/0/0:4:1:2         up    up
ds-0/0/0:4:1:2:1        up    up
ds-0/0/0:4:1:2:1.0      up    up   inet     10.0.0.25/30
                                   inet6    abcd::a00:19/126
                                            fe80::2a0:a5ff:fe5c:15a6/64
t3-0/0/0:4:2            up    up
t3-0/0/0:4:2.0          up    up   inet     10.0.0.17/30
                                   inet6    abcd::a00:11/126
                                            fe80::2a0:a5ff:fe5c:15a6/64

Published: 2010-04-15