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Example: Complex Configuration for a Channelized OC12 IQ Interface

Figure 2: Complex Configuration for a Channelized OC12 IQ Interface

Image g003027.gif

Table 8: Complex Channelization for a Channelized OC12 IQ Interface

Partition

Slices

Interface Type

Interface Level 2

Interface Level 3
1

1–3

OC3

–

–
2

4

Channelized OC1 converted to T3

–

–
3

5

Channelized OC1 converted to channelized T3

28 T1s

–
4

6

Channelized OC1 converted to channelized T3

26 T1s

–
–

–

–

2 CT1s

24 DS0s
–

–

–

–

5 DS0s and 1 channel group of 19 DS0s
5

7

Channelized OC1 converted to T3

–

–
6

8

Channelized OC1

28 T1s

–
7

9

Channelized OC1

26 T1s

–
–

–

–

2 CT1s

24 DS0s
–

–

–

–

5 DS0s and 1 channel group of 19 DS0s
8

10–12

OC3

–

–

Figure 2 and Table 8 show a complex channelization structure that you might encounter if you use the full capabilities of a channelized OC12 IQ interface. Partitions 1 and 8 create an OC3 interface, while Partitions 2 and 5 create T3 interfaces out of channelized OC1 interfaces. Partition 3 (channelized OC1 converted to channelized T3) and Partition 6 (channelized OC1) are channelized interfaces that each subdivide into 28 T1 interfaces. Finally, Partition 4 (channelized OC1 converted to channelized T3) and Partition 7 (channelized OC1) are channelized interfaces that each split into 2 channelized T1 interfaces and 26 T1 interfaces. The first channelized T1 splits into 24 DS0 time slots, whereas the second channelized T1 subdivides into 5 DS0 channels and 1 channel group comprised of 19 DS0 channels.

This example shows two NxDS0 mapping methods. Partition 4 uses M13 mapping for North American T-carrier equipment and Partition 7 uses VT mapping for SONET/SDH 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 {
coc12-4/2/0 {
partition 1 oc-slice 1-3 interface-type so; # Creates OC3 interface so-4/2/0:1.
partition 2 oc-slice 4 interface-type coc1; # Creates interface coc1-4/2/0:2.
partition 3 oc-slice 5 interface-type coc1; # Creates interface coc1-4/2/0:3.
partition 4 oc-slice 6 interface-type coc1; # Creates interface coc1-4/2/0:4.
partition 5 oc-slice 7 interface-type coc1; # Creates interface coc1-4/2/0:5.
partition 6 oc-slice 8 interface-type coc1; # Creates interface coc1-4/2/0:6.
partition 7 oc-slice 9 interface-type coc1; # Creates interface coc1-4/2/0:7.
partition 8 oc-slice 10-12 interface-type so; # Creates an OC3 SONET interface:
}                                                             # so-4/2/0:8.
so-4/2/0:1 {
encapsulation ppp;
unit 0 {
family inet {
address 10.255.0.2/30;
}
}
}
coc1-4/2/0:2 {
no-partition interface-type t3; # This converts the coc1 interface into a
}                                         # T3 interface: t3-4/2/0:2.
t3-4/2/0:2 {
encapsulation ppp;
unit 0 {
family inet {
address 10.255.0.6/30;
}
}
}
coc1-4/2/0:3 {
no-partition interface-type ct3; # This converts the coc1 interface into a
}                                      # channelized T3 interface: ct3-4/2/0:3.
ct3-4/2/0:3 {
partition 1-28 interface-type t1; # This converts the channelized T3 interface
}                               # into 28 T1 channels: t1-4/2/0:3:1 through t1-4/2/0:3:28.
coc1-4/2/0:4 {
no-partition interface-type ct3; # This converts the coc1 interface into a
}                       # channelized T3 interface: ct3-4/2/0:4.
ct3-4/2/0:4 {
partition 1-2 interface-type ct1; # This creates ct1-4/2/0:4:1 and ct1-4/2/0:4:2.
partition 3-28 interface-type t1; # This creates t1-4/2/0:4:3 through
}                                      # t1-4/2/0:4:28.
coc1-4/2/0:5 {
no-partition interface-type t3; # This converts the coc1 interface to a T3:
}                                      # t3-4/2/0:5.
t3-4/2/0:5 {
encapsulation ppp;
unit 0 {
family inet {
address 10.255.1.90/30;
}
}
}
coc1-4/2/0:6 {
partition 1-28 interface-type t1; # This converts the channelized OC1 interface
}                                    # into 28 T1s: t1-4/2/0:6:1 through t1-4/2/0:6:28.
coc1-4/2/0:7 {
partition 1-2 interface-type ct1; # This creates ct1-4/2/0:7:1 and :2.
partition 3-28 interface-type t1; # This creates t1-4/2/0:7:3 through :28.
}
so-4/2/0:8 {
encapsulation ppp;
unit 0 {
family inet {
address 10.255.2.174/30;
}
}
}
t1-4/2/0:3:1 {
encapsulation ppp;
unit 0 {
family inet {
address 10.255.0.10/30;
}
}
}
...
t1-4/2/0:3:28 {
encapsulation ppp;
unit 0 {
family inet {
address 10.255.0.118/30;
}
}
}
ct1-4/2/0:4:1 {
partition 1 timeslots 1 interface-type ds; # This creates 24 DS0 channels:
partition 2 timeslots 2 interface-type ds; # ds-4/2/0:4:1:1 through
partition 3 timeslots 3 interface-type ds; # ds-4/2/0:4:1:24.
partition 4 timeslots 4 interface-type ds;
partition 5 timeslots 5 interface-type ds;
partition 6 timeslots 6 interface-type ds;
partition 7 timeslots 7 interface-type ds;
partition 8 timeslots 8 interface-type ds;
partition 9 timeslots 9 interface-type ds;
partition 10 timeslots 10 interface-type ds;
partition 11 timeslots 11 interface-type ds;
partition 12 timeslots 12 interface-type ds;
partition 13 timeslots 13 interface-type ds;
partition 14 timeslots 14 interface-type ds;
partition 15 timeslots 15 interface-type ds;
partition 16 timeslots 16 interface-type ds;
partition 17 timeslots 17 interface-type ds;
partition 18 timeslots 18 interface-type ds;
partition 19 timeslots 19 interface-type ds;
partition 20 timeslots 20 interface-type ds;
partition 21 timeslots 21 interface-type ds;
partition 22 timeslots 22 interface-type ds;
partition 23 timeslots 23 interface-type ds;
partition 24 timeslots 24 interface-type ds;
}
ds-4/2/0:4:1:1 {
encapsulation ppp;
unit 0 {
family inet {
address 10.255.0.122/30;
}
}
}
...
ds-4/2/0:4:1:24 {
encapsulation ppp;
unit 0 {
family inet {
address 10.255.0.214/30;
}
}
}
ct1-4/2/0:4:2 {
partition 1 timeslots 1-19 interface-type ds; # This creates a channel group.
partition 2 timeslots 20 interface-type ds; # ds-4/2/0:4:2:2 through
partition 3 timeslots 21 interface-type ds; # ds-4/2/0:4:2:6 are single 64-Kbps
partition 4 timeslots 22 interface-type ds; # NxDS0 channels.
partition 5 timeslots 23 interface-type ds;
partition 6 timeslots 24 interface-type ds;
}
ds-4/2/0:4:2:1 { # This is a channel group with 19 DS0s bundled as one.
encapsulation ppp;
unit 0 {
family inet {
address 10.255.0.218/30;
}
}
}
ds-4/2/0:4:2:2 {
encapsulation ppp;
unit 0 {
family inet {
address 10.120.0.222/30;
}
}
}
...
ds-4/2/0:4:2:6 {
encapsulation ppp;
unit 0 {
family inet {
address 10.120.0.238/30;
}
}
}
t1-4/2/0:4:3 {
encapsulation ppp;
unit 0 {
family inet {
address 10.120.0.242/30;
}
}
}
...
t1-4/2/0:4:28 {
encapsulation ppp;
unit 0 {
family inet {
address 10.255.1.86/30;
}
}
}
t1-4/2/0:6:1 {
encapsulation ppp;
unit 0 {
family inet {
address 10.255.1.94/30;
}
}
}
...
t1-4/2/0:6:28 {
encapsulation ppp;
unit 0 {
family inet {
address 10.255.1.202/30;
}
}
}
ct1-4/2/0:7:1 {
partition 1 timeslots 1 interface-type ds; # This creates 24 DS0 channels:
partition 2 timeslots 2 interface-type ds; # ds-4/2/0:7:1:1 through
partition 3 timeslots 3 interface-type ds; # ds-4/2/0:7:1:24.
partition 4 timeslots 4 interface-type ds;
partition 5 timeslots 5 interface-type ds;
partition 6 timeslots 6 interface-type ds;
partition 7 timeslots 7 interface-type ds;
partition 8 timeslots 8 interface-type ds;
partition 9 timeslots 9 interface-type ds;
partition 10 timeslots 10 interface-type ds;
partition 11 timeslots 11 interface-type ds;
partition 12 timeslots 12 interface-type ds;
partition 13 timeslots 13 interface-type ds;
partition 14 timeslots 14 interface-type ds;
partition 15 timeslots 15 interface-type ds;
partition 16 timeslots 16 interface-type ds;
partition 17 timeslots 17 interface-type ds;
partition 18 timeslots 18 interface-type ds;
partition 19 timeslots 19 interface-type ds;
partition 20 timeslots 20 interface-type ds;
partition 21 timeslots 21 interface-type ds;
partition 22 timeslots 22 interface-type ds;
partition 23 timeslots 23 interface-type ds;
partition 24 timeslots 24 interface-type ds;
}
ds-4/2/0:7:1:1 {
encapsulation ppp;
unit 0 {
family inet {
address 10.255.1.206/30;
}
}
}
...
ds-4/2/0:7:1:24 {
encapsulation ppp;
unit 0 {
family inet {
address 10.255.2.42/30;
}
}
}
ct1-4/2/0:7:2 {
partition 1 timeslots 1-19 interface-type ds; # This is a channel group.
partition 2 timeslots 20 interface-type ds; # ds-4/2/0:7:2:2 through
partition 3 timeslots 21 interface-type ds; # ds-4/2/0:7:2:6 are single 64-Kbps
partition 4 timeslots 22 interface-type ds; # NxDS0 channels.
partition 5 timeslots 23 interface-type ds;
partition 6 timeslots 24 interface-type ds;
}
ds-4/2/0:7:2:1 { # This is a channel group with 19 DS0s bundled as one.
encapsulation ppp;
unit 0 {
family inet {
address 10.255.2.46/30;
}
}
}
ds-4/2/0:7:2:2 {
encapsulation ppp;
unit 0 {
family inet {
address 10.255.2.50/30;
}
}
}
...
ds-4/2/0:7:2:6 {
encapsulation ppp;
unit 0 {
family inet {
address 10.255.2.66/30;
}
}
}
t1-4/2/0:7:3 {
encapsulation ppp;
unit 0 {
family inet {
address 10.255.2.70/30;
}
}
}
...
t1-4/2/0:7:28 {
encapsulation ppp;
unit 0 {
family inet {
address 10.255.2.170/30;
}
}
}
}
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