Related Documentation
- M, MX, T Series
- Roadmap for Channelized IQ Interface Configuration Examples
- Roadmap for Configuring Channelized IQ Interfaces
- Additional Information
- Channelized IQ Interfaces Solutions Page
Example: Channelized OC3 IQ Interface Configuration
Figure 1: Channelized OC3 IQ Interface Example

Figure 1 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
Verifying Your Work
To verify correct operation of a channelized OC3 IQ interface, use the following commands:
- show interfaces
- show interfaces controller
- show interfaces interval (for channelized OC3, OC3, T3, channelized T3, T1, and channelized T1 channels)
To view the interface names of the physical channelized OC3 IQ interface and the resulting interfaces configured on the channelized IQ interface, use the show interfaces controller command:
user@host> show interfaces controller
coc3-0/0/0
Controller Admin Link coc3-0/0/0 up up coc1-0/0/0:1 up up t3-0/0/0:1 up up coc1-0/0/0:2 up up t1-0/0/0:2:1 up up ct1-0/0/0:2:2 up up ds-0/0/0:2:2:1 up up ds-0/0/0:2:2:2 up up coc1-0/0/0:3 up up ct3-0/0/0:3 up up ct1-0/0/0:3:1 up up ds-0/0/0:3:1:1 up up ds-0/0/0:3:1:2 up up ds-0/0/0:3:1:3 up up ds-0/0/0:3:1:4 up up ds-0/0/0:3:1:5 up up ds-0/0/0:3:1:6 up up ds-0/0/0:3:1:7 up up ds-0/0/0:3:1:8 up up ds-0/0/0:3:1:9 up up ds-0/0/0:3:1:10 up up ds-0/0/0:3:1:11 up up ds-0/0/0:3:1:12 up up ds-0/0/0:3:1:13 up up ds-0/0/0:3:1:14 up up ds-0/0/0:3:1:15 up up
To verify that your channelized IQ interfaces are working as expected, use the show interfaces command. Use the show interfaces controller command to find the name of the channelized interface you want to view; then include this channelized name (for example, ct3-0/0/0:3) as an option with the show interfaces command.
The next sections provide sample show interfaces output for each of the major interface types configured in this example:
Channelized OC3
user@host> show interfaces coc3-0/0/0
Physical interface: coc3-0/0/0, Enabled, Physical link is Up Interface index: 128, SNMP ifIndex: 1954 Link-level type: Controller, Clocking: Internal, SONET mode, Speed: OC3, Loopback: None, Parent: None Device flags : Present Running Interface flags: Point-To-Point SNMP-Traps 16384 Link flags : None CoS queues : 4 supported Last flapped : 2005-02-15 20:35:24 PST (22:10:54 ago) SONET alarms : None SONET defects : None
Channelized OC1
user@host> show interfaces coc1-0/0/0:1
Physical interface: coc1-0/0/0:1, Enabled, Physical link is Up Interface index: 226, SNMP ifIndex: 1957 Link-level type: Controller, Clocking: Internal, SONET mode, Speed: 51840kbps, Loopback: None, Parent: coc3-0/0/0 Interface index 138 Device flags : Present Running Interface flags: Point-To-Point SNMP-Traps 16384 Link flags : None CoS queues : 4 supported Last flapped : 2004-11-04 10:55:50 PST (05:38:36 ago) SONET alarms : None SONET defects : None
T3
user@host> show interfaces t3-0/0/0:1
Physical interface: t3-0/0/0:1, Enabled, Physical link is Up Interface index: 227, SNMP ifIndex: 43 Link-level type: Cisco-HDLC, MTU: 4474, Clocking: Internal, Speed: T3, Loopback: None, FCS: 16, Mode: C/Bit parity, Parent: coc1-0/0/0:1 Interface index 226 Device flags : Present Running Interface flags: Point-To-Point SNMP-Traps 16384 Link flags : No-Keepalives CoS queues : 4 supported Last flapped : Never Input rate : 0 bps (0 pps) Output rate : 0 bps (0 pps) Active alarms : None Active defects : None DS3 BERT configuration: BERT time period: 10 seconds, Elapsed: 0 seconds Algorithm: 2^15 - 1, O.151, Pseudorandom (9), Induced error rate: 10e-0 Logical interface t3-0/0/0:1.0 (Index 69) (SNMP ifIndex 1960) Flags: Point-To-Point SNMP-Traps Encapsulation: Cisco-HDLC Protocol inet, MTU: 4470 Flags: None Addresses, Flags: Is-Preferred Is-Primary Destination: 10.21.21.0/30, Local: 10.21.21.2, Broadcast: 10.21.21.3
Channelized T3
user@host> show interfaces ct3-0/0/0:3
Physical interface: ct3-0/0/0:3, Enabled, Physical link is Up Interface index: 234, SNMP ifIndex: 2218 Link-level type: Controller, Clocking: Internal, Speed: T3, Loopback: None, Mode: C/Bit parity, Parent: coc1-0/0/0:3 Interface index 233 Device flags : Present Running Interface flags: Point-To-Point SNMP-Traps 16384 Link flags : None CoS queues : 4 supported Last flapped : Never Active alarms : None Active defects : None DS3 BERT configuration: BERT time period: 10 seconds, Elapsed: 0 seconds Algorithm: 2^15 - 1, O.151, Pseudorandom (9), Induced error rate: 10e-0
T1
user@host> show interfaces t1-0/0/0:2:1
Physical interface: t1-0/0/0:2:1, Enabled, Physical link is Up Interface index: 229, SNMP ifIndex: 2091 Link-level type: Cisco-HDLC, MTU: 1504, Clocking: Internal, Speed: T1,
Loopback: None, FCS: 32, Framing: ESF, Parent: coc1-0/0/0:2 Interface index 228 Device flags : Present Running Interface flags: Point-To-Point SNMP-Traps 16384 Link flags : No-Keepalives CoS queues : 4 supported Last flapped : Never Input rate : 0 bps (0 pps) Output rate : 0 bps (0 pps) DS1 alarms : None DS1 defects : None SONET alarms : None SONET defects : None Logical interface t1-0/0/0:2:1.0 (Index 70) (SNMP ifIndex 2092) Flags: Point-To-Point SNMP-Traps Encapsulation: Cisco-HDLC Protocol inet, MTU: 1500 Flags: None Addresses, Flags: Is-Preferred Is-Primary Destination: 10.12.12.0/30, Local: 10.12.12.2, Broadcast: 10.12.12.3
Channelized T1
user@host> show interfaces ct1-0/0/0:2:2
Physical interface: ct1-0/0/0:2:2, Enabled, Physical link is Up Interface index: 230, SNMP ifIndex: 13985 Link-level type: Controller, Clocking: Internal, Speed: T1, Loopback: None, Framing: ESF, Parent: coc1-0/0/0:2 Interface index 228 Device flags : Present Running Interface flags: Point-To-Point SNMP-Traps 16384 Link flags : None CoS queues : 4 supported Last flapped : Never DS1 alarms : None DS1 defects : None SONET alarms : None SONET defects : None
NxDS0
user@host> show interfaces ds-0/0/0:2:2:1
Physical interface: ds-0/0/0:2:2:1, Enabled, Physical link is Up Interface index: 231, SNMP ifIndex: 14016 Link-level type: Cisco-HDLC, MTU: 1504, Clocking: Internal, Speed: 640kbps, Loopback: None, FCS: 16, Parent: ct1-0/0/0:2:2 Interface index 230 Device flags : Present Running Interface flags: Point-To-Point SNMP-Traps 16384 Link flags : No-Keepalives CoS queues : 8 maximum usable queues, 4 in use Egress queues : 8 supported, 4 in use4 supported Last flapped : Never Input rate : 0 bps (0 pps) Output rate : 0 bps (0 pps) DS0 BERT configuration: BERT time period: 10 seconds, Elapsed: 0 seconds Induced Error rate: 10e-0, Algorithm: 2^15 - 1, O.151, Pseudorandom (9) Logical interface ds-0/0/0:2:2:1.0 (Index 71) (SNMP ifIndex 20889) Flags: Point-To-Point SNMP-Traps Encapsulation: Cisco-HDLC Protocol inet, MTU: 1500 Flags: None Addresses, Flags: Is-Preferred Is-Primary Destination: 10.13.13.0/30, Local: 10.13.13.2, Broadcast: 10.13.13.3
Clear Channel SONET OC3
user@host> show interfaces so-0/1/0
Physical interface: so-0/1/0, Enabled, Physical link is Down Interface index: 128, SNMP ifIndex: 15684 Link-level type: Cisco-HDLC, MTU: 4474, Clocking: Internal, SONET mode, Speed: OC3, Loopback: None, FCS: 16, Payload scrambler: Enabled Parent: coc3-0/1/0 Interface index 142 Device flags : Present Running Down Interface flags: Hardware-Down Point-To-Point SNMP-Traps 16384 Link flags : Keepalives CoS queues : 4 supported Last flapped : 2004-11-04 10:53:54 PST (05:51:04 ago) Input rate : 0 bps (0 pps) Output rate : 0 bps (0 pps) SONET alarms : PLM-P SONET defects : PLM-P Logical interface so-0/1/0.0 (Index 67) (SNMP ifIndex 15686) Flags: Device-Down Point-To-Point SNMP-Traps Encapsulation: Cisco-HDLC Protocol inet, MTU: 4470 Flags: None Addresses, Flags: Dest-route-down Is-Preferred Is-Primary Destination: 10.22.22.0/30, Local: 10.22.22.1, Broadcast: 10.22.22.3
Related Documentation
- M, MX, T Series
- Roadmap for Channelized IQ Interface Configuration Examples
- Roadmap for Configuring Channelized IQ Interfaces
- Additional Information
- Channelized IQ Interfaces Solutions Page
Published: 2012-11-28
Related Documentation
- M, MX, T Series
- Roadmap for Channelized IQ Interface Configuration Examples
- Roadmap for Configuring Channelized IQ Interfaces
- Additional Information
- Channelized IQ Interfaces Solutions Page