Example: Channelized DS-3 QPP Interface Configuration
The last example shows how to configure a channelized DS-3 QPP interface. Figure 4 shows the breakdown of a DS-3 interface into a variety of channels. The path that leads to NxDS-0 channels is similar to the M13 with C-bit parity method seen previously in the complex OC-12 configuration example (see Example: Complex Configuration for a Channelized OC-12 QPP Interface). This method breaks the channelized DS-3 QPP interface into channelized T1s before additional splits create DS-0 timeslots.
To create T1 channels, include the partition statement at the [edit interfaces ct3-fpc/pic/port] hierarchy level with the interface-type t1 option. To create channelized T1 channels, include the partition statement at the [edit interfaces ct3-fpc/pic/port] hierarchy level with the interface-type ct1 option.
After you have established a channelized T1 channel, you can split it into a maximum of 24 NxDS-0 channels. To configure NxDS-0 channels, include the partition statement at the [edit interfaces ct1-fpc/pic/port:channel] hierarchy level with the timeslots and interface-type ds options to create the desired number of NxDS-0 channels or channel groups.
Although it is not part of the example below, you can also create a clear channel T3 or a fractional T3 interface on a channelized DS-3 QPP interface. To configure a clear channel T3 or fractional T3 interface, include the no-partition statement at the [edit interfaces ct3-fpc/pic/port] hierarchy level. After you commit this part of the configuration, a clear channel T3 interface is established. You can configure standard T3 options on this interface. To fractionalization the T3 interface, include the timeslots statement at the [edit interfaces t3-fpc/pic/port t3-options] hierarchy level.
Router A
[edit]
interfaces {
ct3-0/0/1 { #This is the controller level for the entire channelized DS-3 QPP interface.
partition 1 interface-type t1; #This creates the t1-0/0/1:1 channel.
partition 2 interface-type ct1; #This creates the ct1-0/0/1:2 channel.
partition 3-10 interface-type t1; #This creates channels t1-0/0/1:3 through t1-0/0/1:10.
partition 11-28 interface-type ct1; #This creates channels ct1-0/0/1:11 through ct1-0/0/1:28.
}
t1-0/0/1:1
...
}
ct1-0/0/1:2
partition 1 timeslots 1-10 interface-type ds; #This creates a channel group with 10 NxDS-0s.
partition 2 timeslots 11-20 interface-type ds; #This creates a channel group with 10 NxDS-0s.
partition 3 timeslots 21-24 interface-type ds; #This creates a channel group with 4 NxDS-0s.
}
ds-0/0/1:2:1
unit 0 {
family inet {
address 10.25.1.2/24;
}
}
}
ds-0/0/1:2:2
unit 0 {
family inet {
address 10.25.2.2/24;
}
}
}
ds-0/0/1:2:3
unit 0 {
family inet {
address 10.25.3.2/24;
}
}
}
t1-0/0/1:3
...
}
t1-0/0/1:10
...
}
ct1-0/0/1:11
...
}
ct1-0/0/1:28
...
}
}