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Example: Channelized OC3 IQ Interface Configuration

Figure 1: Channelized OC3 IQ Interface Example

Image g015506.gif

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

[edit]interfaces {coc3-0/0/0 {partition 1 oc-slice 1 interface-type coc1; # Creates three channelized OC1partition 2 oc-slice 2 interface-type coc1; # interfaces: coc1-0/0/0:1 throughpartition 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;}}}}

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     : 4 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

Published: 2010-04-15

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