Step 3: Display the Status of a Specific Channel of a Channelized OC-12 IQ Interface
Action
To display the status of a specific channel of an OC-12 IQ interface, use the following JUNOS CLI operational mode command:
user@host>show interfacesinterface-type-fpc/pic/port:channel
user@host>show interfacesinterface-type-fpc/pic/port:channel:channel
user@host>show interfacesinterface-type-fpc/pic/port:channel:channel:channel
Sample Output 1
user@host> show interfaces so-0/0/0:1
Physical interface: so-0/0/0:1, Enabled, Physical link is Up
Interface index: 197, SNMP ifIndex: 131
Link-level type: PPP, MTU: 4474, Clocking: Internal, SONET mode, Speed: OC3,
Loopback: None, FCS: 16, Payload scrambler: Enabled,
Parent: coc12-0/0/0 Interface index 195
Device flags : Present Running
Interface flags: Point-To-Point SNMP-Traps
Link flags : Keepalives
Keepalive settings: Interval 10 seconds, Up-count 1, Down-count 3
Keepalive: Input: 17 (00:00:01 ago), Output: 17 (00:00:08 ago)
LCP state: Opened
NCP state: inet: Opened, inet6: Not-configured, iso: Not-configured, mpls:
Not-configured
CHAP state: Not-configured
CoS queues : 4 supported
Last flapped : 2004-05-26 22:19:18 UTC (00:02:59 ago)
Input rate : 0 bps (0 pps)
Output rate : 0 bps (0 pps)
SONET alarms : None
SONET defects : None
Logical interface so-0/0/0:1.0 (Index 70) (SNMP ifIndex 132)
Flags: Point-To-Point SNMP-Traps Encapsulation: PPP
Protocol inet, MTU: 4470
Flags: None
Addresses, Flags: Is-Preferred Is-Primary
Destination: 20.20.20.0/30, Local: 20.20.20.1, Broadcast: 20.20.20.3
Sample Output 2
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: 199, SNMP ifIndex: 133
Link-level type: PPP, MTU: 1504, Clocking: Internal, Speed: T1,
Loopback: None, FCS: 16, Framing: ESF,
Parent: coc1-0/0/0:2 Interface index 198
Device flags : Present Running
Interface flags: Point-To-Point SNMP-Traps
Link flags : Keepalives
Keepalive settings: Interval 10 seconds, Up-count 1, Down-count 3
Keepalive: Input: 44 (00:00:07 ago), Output: 46 (00:00:01 ago)
LCP state: Opened
NCP state: inet: Opened, inet6: Not-configured, iso: Not-configured, mpls:
Not-configured
CHAP state: Not-configured
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 71) (SNMP ifIndex 134)
Flags: Point-To-Point SNMP-Traps Encapsulation: PPP
Protocol inet, MTU: 1500
Flags: None
Addresses, Flags: Is-Preferred Is-Primary
Destination: 20.20.20.4/30, Local: 20.20.20.5, Broadcast: 20.20.20.7
Sample Output 3
user@host> show interfaces ds-0/0/0:4:1:1
Physical interface: ds-0/0/0:4:1:1, Enabled, Physical link is Up
Interface index: 231, SNMP ifIndex: 168
Link-level type: PPP, MTU: 1504, Clocking: Internal, Speed: 640kbps,
Loopback: None, FCS: 16, Parent: ct1-0/0/0:4:1 Interface index 230
Device flags : Present Running
Interface flags: Point-To-Point SNMP-Traps
Link flags : Keepalives
Keepalive settings: Interval 10 seconds, Up-count 1, Down-count 3
Keepalive: Input: 58 (00:00:06 ago), Output: 59 (00:00:01 ago)
LCP state: Opened
NCP state: inet: Opened, inet6: Not-configured, iso: Not-configured, mpls:
Not-configured
CHAP state: Not-configured
CoS queues : 4 supported
Last flapped : Never
Input rate : 48 bps (0 pps)
Output rate : 48 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-0/0/0:4:1:1.0 (Index 75) (SNMP ifIndex 173)
Flags: Point-To-Point SNMP-Traps Encapsulation: PPP
Protocol inet, MTU: 1500
Flags: None
Addresses, Flags: Is-Preferred Is-Primary
Destination: 20.20.20.12/30, Local: 20.20.20.13, Broadcast: 20.20.20.15
What It Means
The first line of the output shows the status of the link. If this line shows that the physical link is up, the physical link is healthy and can pass packets. If this line shows that the physical link is down, the physical link is unhealthy and cannot pass packets. All four examples of output show the link is up and can pass packets.
Sample output 1 shows an OC-3 SONET interface. Sample output 2 shows a T1 interface that is the result of a partitioned OC-1 interface, and sample output 3 shows a DS-0 interface that is the result of an OC-1 interface partitioned into a T1 interface, which is further partitioned into the DS-0 interface.
Figure 24 shows a visual representation of the different channel levels.
When only one or some individual channels are down, you must troubleshoot the channel by checking the configuration, transmission network, and equipment. If all of the physical layers for the channels are down, you must work with this as a T1, T3, DS-0, or OC-12 SONET link or PIC problem. For more information on monitoring these types of interfaces, see the respective sections in this guide.