Example: Channelized OC3 IQ Interface Configuration
Figure 5 shows a sample channelization structure for a channelized OC3 IQ interface. Top-level partitions 1, 2, and 3 create channelized OC1 interfaces. The first channelized OC1 interface, coc1-0/0/0:1, is converted directly into the T3 interface t3-0/0/0:1. The second channelized OC1 interface, coc1-0/0/0:2, is partitioned into a T1 interface and a channelized T1 interface. The channelized T1 interface, t1-0/0/0:2:2, is then further subdivided into two NxDS0 channel groups: ds-0/0/0:2:2:1 and ds-0/0/0:2:2:2.
The remaining channelized OC1 interface, coc1-0/0/0:3, is converted to a channelized T3 interface, then to a channelized T1 interface, and ultimately to 14 individual NxDS0 channels and a channel group containing 10 NxDS0 channels. Additionally, channelized OC3 IQ interface coc3-0/1/0 uses the no-partition statement at the [edit interface interface-name] hierarchy level to create a clear channel SONET OC3 interface so-0/1/0. This example shows two NxDS0 mapping methods. Partition 2:x:x uses VT mapping for SONET/SDH equipment, while partition 3:x:x uses M13 mapping for North American T-carrier equipment.
This example also assumes corresponding interfaces. For example, for every sublevel T1 interface you configure on Router A, assume you have configured a matching sublevel or physical T1 interface on a neighboring router.
Router A
[edit]
interfaces {
coc3-0/0/0 {
partition 1 oc-slice 1 interface-type coc1; # Creates three channelized OC1
partition 2 oc-slice 2 interface-type coc1; # interfaces: coc1-0/0/0:1 through
partition 3 oc-slice 3 interface-type coc1; # coc1-0/0/0:3.
}
coc1-0/0/0:1 {
no-partition interface-type t3; # This converts the COC1 interface into
} # T3 interface t3-0/0/0:1.
t3-0/0/0:1 {
no-keepalives;
encapsulation cisco-hdlc;
t3-options {
fcs 32;
feac-loop-respond;
}
unit 0 {
family inet {
address 10.21.21.2/30;
}
}
}
coc1-0/0/0:2 {
partition 1 interface-type t1; # Creates the T1 interface t1-0/0/0:2:1.
partition 2 interface-type ct1; # Creates the channelized T1 interface
} # ct1-0/0/0:2:2.
t1-0/0/0:2:1 {
no-keepalives;
encapsulation cisco-hdlc;
t1-options {
fcs 32;
}
unit 0 {
family inet {
address 10.12.12.2/30;
}
}
}
ct1-0/0/0:2:2 {
partition 1 timeslots 1-10 interface-type ds; # This converts the channelized T1
partition 2 timeslots 11-24 interface-type ds; # interface into two channel
} # groups: ds-0/0/0:2:2:1 and ds-0/0/0:2:2:2.
ds-0/0/0:2:2:1 { # This is a channel group with 10 NxDS0s bundled as one.
no-keepalives;
encapsulation cisco-hdlc;
unit 0 {
family inet {
address 10.13.13.2/30;
}
}
}
ds-0/0/0:2:2:2 { # This is a channel group with 14 NxDS0s bundled as one.
encapsulation frame-relay;
unit 0 {
dlci 10;
family inet {
address 10.14.14.2/30;
}
}
}
coc1-0/0/0:3 {
partition 1 interface-type ct3; # Creates the channelized T3 interface
} # ct3-0/0/0:3.
ct1-0/0/0:3:1 {
partition 1 timeslots 1-10 interface-type ds; # Creates a channel group.
partition 2 timeslots 11 interface-type ds; # Creates single NxDS0 channels.
partition 3 timeslots 12 interface-type ds;
partition 4 timeslots 13 interface-type ds;
partition 5 timeslots 14 interface-type ds;
partition 6 timeslots 15 interface-type ds;
partition 7 timeslots 16 interface-type ds;
partition 8 timeslots 17 interface-type ds;
partition 9 timeslots 18 interface-type ds;
partition 10 timeslots 19 interface-type ds;
partition 11 timeslots 20 interface-type ds;
partition 12 timeslots 21 interface-type ds;
partition 13 timeslots 22 interface-type ds;
partition 14 timeslots 23 interface-type ds;
partition 15 timeslots 24 interface-type ds;
}
ds-0/0/0:3:1:1 { # This is a channel group with 10 NxDS0s bundled as one.
no-keepalives;
encapsulation cisco-hdlc;
unit 0 {
family inet {
address 10.31.31.2/30;
}
}
}
ds-0/0/0:3:1:2 { # ds-0/0/0:3:1:2 through :15 are single NxDS0s channels.
encapsulation frame-relay;
unit 0 {
dlci 10;
family inet {
address 10.32.32.2/30;
}
}
}
## Assume ds-0/0/0:3:1:3 through :14 are configured here...
ds-0/0/0:3:1:15 { # ds-0/0/0:3:1:2 through :15 are single NxDS0s channels.
encapsulation frame-relay;
unit 0 {
dlci 10;
family inet {
address 10.45.45.2/30;
}
}
}
coc3-0/1/0 {
no-partition interface-type so; # Creates a clear channel SONET OC3 interface.
}
so-0/1/0 { # This is the clear channel SONET OC3 interface so-0/1/0.
dce;
encapsulation frame-relay;
unit 1 {
dlci 11;
family inet {
address 10.22.22.1/30;
}
}
}
}