Monitor Channelized DS3 Interfaces
Checklist for Monitoring Channelized DS3 Interfaces
Purpose
To monitor Channelized DS3 interfaces and begin the process of isolating Channelized DS3 interface problems when they occur.
Action
Table 1 provides the links and commands for monitoring Channelized DS3 interfaces.
Table 1: Checklist for Monitoring Channelized DS3 Interfaces
Tasks | Command or Action |
|---|---|
| Monitor Channelized DS3 Interfaces | |
show interfaces terse t1* | |
show interfaces t1-fpc/pic/port:channel | |
show interfaces t1-fpc/pic/port:channel extensive | |
monitor interfaces t1-fpc/pic/port:channel |
Monitor Channelized DS3 Interfaces
By monitoring Channelized DS3 interfaces, you begin the process of isolating Channelized DS3 interface problems when they occur.
To monitor your Channelized DS3 interfaces, follow these steps:
- Display the Status of Channelized DS3 Interfaces
- Display the Status of a Specific Channelized DS3 Interface
- Display Extensive Status Information for a Specific Channelized DS3 Interface
- Monitor Statistics for a Channelized DS3 Interface
Display the Status of Channelized DS3 Interfaces
Purpose
To display the status of Channelized DS3 interfaces, use the following Junos OS command-line interface (CLI) operational mode command:
Action
Sample Output 1
user@host> show interfaces t1* terse Interface Admin Link Proto Local Remote t1-1/2/0:1 up down t1-1/2/0:2 up down t1-1/2/0:3 up down t1-1/2/0:4 up down t1-1/2/0:5 up up t1-1/2/0:5.0 up up inet 172.16.1.33/30 t1-1/2/0:6 up up t1-1/2/0:6.0 up up inet 172.16.1.37/30 t1-1/2/0:7 up up t1-1/2/0:7.0 up up inet 172.16.1.41/30 t1-1/2/0:8 up down t1-1/2/0:9 up down t1-1/2/0:10 up down t1-1/2/0:11 up up t1-1/2/0:11.0 up up inet 172.16.1.45/30 t1-1/2/0:12 up up t1-1/2/0:12.0 up up inet 172.16.1.49/30 t1-1/2/0:13 up up t1-1/2/0:13.0 up up inet 172.16.1.53/30 t1-1/2/0:14 up up t1-1/2/0:14.0 up up inet 172.16.1.153/30 t1-1/2/0:15 up up t1-1/2/0:15.0 up up inet 172.16.1.177/30 t1-1/2/0:16 up up t1-1/2/0:16.0 up up inet 172.16.1.181/30 t1-1/2/0:17 up up t1-1/2/0:17.0 up up inet 172.16.1.129/30 t1-1/2/0:18 up up t1-1/2/0:18.0 up up inet 172.16.1.133/30 t1-1/2/0:19 up down t1-1/2/0:19.0 up down inet 172.16.1.137/30 t1-1/2/0:20 up down t1-1/2/0:21 up down t1-1/2/0:22 up down t1-1/2/0:23 up down t1-1/2/0:24 up down t1-1/2/0:25 up down t1-1/2/0:26 up down t1-1/2/0:27 up down t1-1/2/0:28 up down
Sample Output 2
user@host> show interfaces t1* terse Interface Admin Link Proto Local Remote t1-0/3/3:0 down down t1-0/3/3:0.0 up down inet 10.10.10.1/30 t1-0/3/3:1 up up t1-0/3/3:1.0 up up inet 10.10.10.5/30 t1-0/3/3:2 up up t1-0/3/3:2.0 up up inet 10.10.10.53/30
Meaning
The sample output shows the status of both the physical and logical interfaces. Sample output 1 shows that 12 of the possible 28 channels have IP addresses and are connected. Of the 12 connected channels, the last channel (t1-1/2/0:19.0) is currently down.
Sample output 2 shows that all links are up except for interface t1-0/3/3:0, which has both the physical and logical links down.
Display the Status of a Specific Channelized DS3 Interface
Purpose
To display the status of a specific Channelized DS3 interface, use the following Junos OS CLI operational mode command:
Action
Sample Output 1
user@host> show interfaces t1-1/2/0:5 Physical interface: t1-1/2/0:5, Enabled, Physical link is Up
Interface index: 181, SNMP ifIndex: 210
Description: T1 to Tombstone – Circuit # 123456789
Link-level type: PPP , MTU: 1504, Clocking: Internal , Speed: T1, Loopback: None, FCS: 16 , Framing: ESF ,
Parent: ct3-1/2/0 Interface index 173
Device flags : Present Running
Interface flags: Point-To-Point SNMP-Traps
Link flags : Keepalives
Keepalive settings: Interval 60 seconds, Up-count 1, Down-count 3
Keepalive: Input: 6898 (00:00:48 ago), Output: 6874 (00:00:07 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 : 2004-05-11 16:01:30 EDT (5d 02:41 ago)
Input rate : 2648 bps (6 pps)
Output rate : 14608 bps (4 pps)
DS1 alarms : None
DS1 defects : None
Logical interface t1-1/2/0:5.0 (Index 86) (SNMP ifIndex 238)
Flags: Point-To-Point SNMP-Traps Encapsulation: PPP
Protocol inet, MTU: 1500
Flags: None
Addresses, Flags: Is-Preferred Is-Primary
Destination: 68.71.141.32/30, Local: 68.71.141.33, Broadcast: 68.71.141.35
Sample Output 2
user@host> show interfaces t1-0/3/3:2 Physical interface: t1-0/3/3:2, Enabled, Physical link is Up
Interface index: 239, SNMP ifIndex: 127
Description:
Link-level type: Cisco-HDLC , MTU: 1504, Clocking: Internal, Speed: T1,
Loopback: None, FCS: 16, Mode: M23, Framing: ESF
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: 124789 (00:00:08 ago), Output: 125379 (00:00:04 ago)
CoS queues : 4 supported
Last flapped : 2004-04-30 09:12:44 UTC (2w0d 10:45 ago)
Input rate : 3984 bps (10 pps)
Output rate : 56328 bps (14 pps)
DS1 alarms : None
DS3 alarms : None
DS1 defects : None
DS3 defects : None
Logical interface t1-0/3/3:2.0 (Index 132) (SNMP ifIndex 236)
Flags: Point-To-Point SNMP-Traps Encapsulation: Cisco-HDLC
Input packets : 33897375
Output packets: 40673351
Protocol inet, MTU: 1500
Flags: No-Redirects, uRPF, uRPF-loose
Addresses, Flags: Primary Is-Preferred Is-Primary
Destination: 10.10.10.52/30, Local: 10.10.10.53,
Broadcast: 10.10.10.55
Sample Output 3
user@host> show interfaces t1-1/2/0:1 Physical interface: t1-1/2/0:1, Enabled, Physical link is Down Interface index: 177, SNMP ifIndex: 205 Description: T1 to Bedrock #1 - RESERVED Link-level type: PPP, MTU: 1504, Clocking: Internal, Speed: T1, Loopback: None, FCS: 16, Framing: ESF, Parent: ct3-1/2/0 Interface index 173 Device flags : Present Running Down Interface flags: Hardware-Down Point-To-Point SNMP-Traps Link flags : Keepalives CoS queues : 4 supported Last flapped : 2004-04-02 09:12:49 EST (6w2d 08:29 ago) Input rate : 0 bps (0 pps) Output rate : 0 bps (0 pps) DS1 alarms : AIS, LOF DS1 defects : AIS, LOF
Sample Output 4
user@host> show interfaces t1-1/2/0:19 Physical interface: t1-1/2/0:19, Enabled, Physical link is Down
Interface index: 148, SNMP ifIndex: 224
Description: T1 to Rock City #6 – Circuit # 987654321
Link-level type: PPP, MTU: 1504, Clocking: Internal, Speed: T1, Loopback: None, FCS: 16, Framing: ESF,
Parent: ct3-1/2/0 Interface index 173
Device flags : Present Running Down
Interface flags: Hardware-Down Point-To-Point SNMP-Traps
Link flags : Keepalives
Keepalive settings: Interval 60 seconds, Up-count 1, Down-count 3
Keepalive: Input: 0 (never), Output: 0 (never)
LCP state: Conf-req-sent
NCP state: inet: Down , inet6: Not-configured, iso: Not-configured, mpls: Not-configured
CHAP state: Not-configured
CoS queues : 4 supported
Last flapped : 2004-05-14 15:56:43 EDT (2d 02:47 ago)
Input rate : 0 bps (0 pps)
Output rate : 0 bps (0 pps)
DS1 alarms : AIS, LOF
DS1 defects : AIS, LOF
Logical interface t1-1/2/0:19.0 (Index 91) (SNMP ifIndex 256)
Flags: Hardware-Down Device-Down Point-To-Point SNMP-Traps Encapsulation: PPP
Protocol inet, MTU: 1500
Flags: Protocol-Down
Addresses, Flags: Dest-route-down Is-Preferred Is-Primary
Destination: 68.71.141.136/30, Local: 68.71.141.137, Broadcast: 68.71.141.139
Meaning
The first line of the output shows the status of the channel. 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.
Sample output 1 shows a channel that is connected and operating correctly. You can verify the following information to check that the interface is functioning correctly:
- Encapsulation used on the physical interface, Link-level type: PPP
- Reference clock source, Clocking: Internal
- Frame checksum sequence, FCS: 16
- Physical layer framing format used on the link, Framing: ESF
Because the link-level type is Point-to-Point Protocol (PPP), the link control protocol (LCP) state is Opened, and the network control protocol (NCP) state has one protocol, NCP::inet:Opened, indicating that the link is healthy. There are no DS1 alarms or defects.
Sample output 2 shows a channel that is connected and operating correctly. However, this channel has Cisco HDLC configured as the link-level type and a logical interface (t1-0/3/3:2.0) configured.
Sample output 3 shows a channel that is not connected, Physical link is Down. Loopback is not configured, Loopback: None, and the input and output counters are zero. In addition, there are alarm indication signal (AIS) and loss of frame (LOF) alarms and defects.
Sample output 4 shows a channel that is assigned but down, Physical link is Down. Information about the physical interfaces shows the device flags are Present Running Down, and one of the interface flags is Hardware-Down. In addition, interface protocol initialization failed to complete successfully on logical interface t1-1/2/0:19.0, Flags: Hardware-Down Device-Down.
Display Extensive Status Information for a Specific Channelized DS3 Interface
Purpose
To display the status of Channelized DS3 interfaces, use the following Junos OS CLI operational mode command:
Action
Sample Output 1
user@host> show interfaces t1-1/2/0:5 extensive Physical interface: t1-1/2/0:5, Enabled, Physical link is Up
Interface index: 181, SNMP ifIndex: 210, Generation: 96
Description: T1 to Tombstone – Circuit # 123456789
Link-level type: PPP, MTU: 1504, Clocking: Internal, Speed: T1, Loopback: None, FCS: 16, Framing: ESF,
Parent: ct3-1/2/0 Interface index 173
Device flags : Present Running
Interface flags: Point-To-Point SNMP-Traps
Link flags : Keepalives
Hold-times : Up 0 ms, Down 0 ms
Keepalive settings: Interval 60 seconds, Up-count 1, Down-count 3
Keepalive statistics:
Input : 6910 (last seen 00:00:21 ago)
Output: 6886 (last sent 00:00:04 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 : 2004-05-11 16:01:30 EDT (5d 02:53 ago)
Statistics last cleared: 2004-05-11 23:43:42 EDT (4d 19:10 ago)
Traffic statistics:
Input bytes : 551301316 4432 bps
Output bytes : 4091306894 2696 bps
Input packets: 5231609 6 pps
Output packets: 4867661 3 pps
Input errors:
Errors: 47, Drops: 0, Framing errors: 0, Runts: 0, Giants: 0, Policed discards: 398, L3 incompletes: 0, L2 channel errors: 0,
L2 mismatch timeouts: 0, HS link CRC errors: 0, SRAM errors: 0
Output errors:
Carrier transitions: 0, Errors: 0, Drops: 0, Aged packets: 0
Queue counters: Queued packets Transmitted packets Dropped packets
0 best-effort 4820512 4804578 24909
1 expedited-fo 0 0 0
2 assured-forw 0 0 0
3 network-cont 63083 63083 0
DS1 alarms : None
DS1 defects : None
T1 media: Seconds Count State
SEF 5 4 OK
BEE 246 127 OK
AIS 0 0 OK
LOF 0 0 OK
LOS 0 0 OK
YELLOW 0 0 OK
BPV 0 0
EXZ 0 0
LCV 246 538
PCV 0 0
CS 0 0
LES 0
ES 0
SES 8
SEFS 12
BES 0
UAS 0
HDLC configuration:
Policing bucket: Disabled
Shaping bucket : Disabled
Giant threshold: 1514, Runt threshold: 0
Timeslots : All active
Line encoding: B8ZS, Byte encoding: Nx64K
Buildout : 0 to 132 feet
Data inversion: Disabled, Idle cycle flag: flags, Start end flag: shared
DS1 BERT configuration:
BERT time period: 10 seconds, Elapsed: 0 seconds
Induced Error rate: 10e-0, Algorithm: 2^15 - 1, O.151, Pseudorandom (9)
Packet Forwarding Engine configuration:
Destination slot: 1, PLP byte: 4 (0x01)
Logical interface t1-1/2/0:5.0 (Index 86) (SNMP ifIndex 238) (Generation 111)
Flags: Point-To-Point SNMP-Traps Encapsulation: PPP
Protocol inet, MTU: 1500, Generation: 117, Route table: 0
Flags: None
Addresses, Flags: Is-Preferred Is-Primary
Destination: 68.71.141.32/30, Local: 68.71.141.33, Broadcast: 68.71.141.35, Generation: 169
Even though there are counts in the t1 media section of the output, notice how the “ State” column has all “ OK”
Sample Output 2
user@host> show interfaces t1-0/3/3:2 extensive Physical interface: t1-0/3/3:2, Enabled, Physical link is Up
Interface index: 239, SNMP ifIndex: 127, Generation: 122
Description:
Link-level type: Cisco-HDLC, MTU: 1504, Clocking: Internal, Speed: T1,
Loopback: None, FCS: 16, Mode: M23, Framing: ESF
Device flags : Present Running
Interface flags: Point-To-Point SNMP-Traps
Link flags : Keepalives
Hold-times : Up 0 ms, Down 0 ms
Keepalive settings: Interval 10 seconds, Up-count 1, Down-count 3
Keepalive statistics:
Input : 124790 (last seen 00:00:03 ago)
Output: 125379 (last sent 00:00:09 ago)
CoS queues : 4 supported
Last flapped : 2004-04-30 09:12:44 UTC (2w0d 10:45 ago)
Statistics last cleared: Never
Traffic statistics:
Input bytes : 2930724407 9560 bps
Output bytes : 9983871242 78464 bps
Input packets: 17011460 14 pps
Output packets: 20390813 19 pps
Input errors:
Errors: 0, Drops: 0, Framing errors: 0, Policed discards: 233516,
L3 incompletes: 1, L2 channel errors: 0, L2 mismatch timeouts: 0,
HS link CRC errors: 0, SRAM errors: 0
Output errors:
Carrier transitions: 1, Errors: 0, Drops: 17341, Aged packets: 0
DS1 alarms : None
DS3 alarms : None
DS1 defects : None
DS3 defects : None
T1 media: Seconds Count State
SEF 0 0 OK
BEE 1 1 OK
AIS 0 0 OK
LOF 0 0 OK
LOS 0 0 OK
YELLOW 7 1 OK
BPV 0 0
EXZ 0 0
LCV 1 1029
PCV 0 0
CS 0 0
LES 0
ES 0
SES 1
SEFS 2
BES 0
UAS 0
DS3 media: Seconds Count State
PLL Lock 0 0 OK
Reframing 0 0 OK
AIS 0 0 OK
LOF 0 0 OK
LOS 0 0 OK
IDLE 0 0 OK
YELLOW 7 1 OK
BPV 1 65535
EXZ 1 65535
LCV 2 131070
PCV 1 1079
LES 1
PES 1
PSES 1
SEFS 0
UAS 0
Interface transmit queues:
B/W WRR Packets Bytes Drops Errors
Queue0 95 95 20265434 9981112904 17341 0
Queue1 5 5 125379 2758338 0 0
HDLC configuration:
Giant threshold: 1514, Runt threshold: 3
Timeslots : 1-24
Line encoding: B8ZS, Byte encoding: Nx64K, Data inversion: Disabled,
Idle cycle flag: flags, Start end flag: shared
DS-3 BERT configuration:
BERT time period: 10 seconds, Elapsed: 0 seconds
Algorithm: 2^3 - 1, Pseudorandom (1), Induced error rate: 10e-0
DS1 BERT configuration:
BERT time period: 10 seconds, Elapsed: 0 seconds
Induced Error rate: 10e-0, Algorithm: 2^15 - 1, O.151, Pseudorandom (9)
Packet Forwarding Engine configuration:
Destination slot: 0, PLP byte: 2 (0x2e)
CoS transmit queue Bandwidth Buffer Priority Limit
% bps % bytes
0 best-effort 95 1459200 95 0 low none
3 network-control 5 76800 5 0 low none
Logical interface t1-0/3/3:2.0 (Index 132) (SNMP ifIndex 236) (Generation 69)
Flags: Point-To-Point SNMP-Traps Encapsulation: Cisco-HDLC
Traffic statistics:
Input bytes : 5789719245
Output bytes : 19909405752
Input packets: 33897585
Output packets: 40673646
Local statistics:
Input bytes : 2930724407
Output bytes : 9983871242
Input packets: 17011460
Output packets: 20390813
Transit statistics:
Input bytes : 2858994838 14784 bps
Output bytes : 9925534510 286584 bps
Input packets: 16886125 25 pps
Output packets: 20282833 38 pps
Protocol inet, MTU: 1500, Generation: 80, Route table: 0
Flags: No-Redirects, uRPF, uRPF-loose
RPF Failures: Packets: 0, Bytes: 0
Addresses, Flags: Primary Is-Preferred Is-Primary
Destination: 10.10.10.52/30, Local: 10.10.10.53,
Broadcast: 10.10.10.55, Generation: 159
Sample Output 3
user@host> show interfaces t1-1/2/0:19 extensive
Physical interface: t1-1/2/0:19, Enabled, Physical link is Down
Interface index: 148, SNMP ifIndex: 224, Generation: 110
Description: T1 to Rock City – Circuit # 987654321
Link-level type: PPP, MTU: 1504, Clocking: Internal, Speed: T1, Loopback: None, FCS: 16, Framing: ESF,
Parent: ct3-1/2/0 Interface index 173
Device flags : Present Running Down
Interface flags: Hardware-Down Point-To-Point SNMP-Traps
Link flags : Keepalives
Hold-times : Up 0 ms, Down 0 ms
Keepalive settings: Interval 60 seconds, Up-count 1, Down-count 3
Keepalive statistics:
Input : 0 (last seen: never)
Output: 0 (last sent: never)
LCP state: Conf-req-sent
NCP state: inet: Down, inet6: Not-configured, iso: Not-configured, mpls: Not-configured
CHAP state: Not-configured
CoS queues : 4 supported
Last flapped : 2004-05-14 15:56:43 EDT (2d 03:01 ago)
Statistics last cleared: 2004-04-09 13:30:02 EDT (5w2d 05:28 ago)
Traffic statistics:
Input bytes : 89198 0 bps
Output bytes : 90532 0 bps
Input packets: 6371 0 pps
Output packets: 6448 0 pps
Input errors:
Errors: 271124, Drops: 0, Framing errors: 0, Runts: 0, Giants: 0, Policed discards: 266254, L3 incompletes: 0,
L2 channel errors: 2, L2 mismatch timeouts: 2, HS link CRC errors: 0, SRAM errors: 0
Output errors:
Carrier transitions: 32, Errors: 0, Drops: 0, Aged packets: 0
Queue counters: Queued packets Transmitted packets Dropped packets
0 best-effort 0 0 0
1 expedited-fo 0 0 0
2 assured-forw 0 0 0
3 network-cont 6448 6448 0
DS1 alarms : AIS, LOF
DS1 defects : AIS, LOF
T1 media: Seconds Count State
SEF 33 31 OK
BEE 53 47 OK
AIS 3201537 15 Defect Active
LOF 3202041 16 Defect Active
LOS 0 0 OK
YELLOW 1023435 0 OK
BPV 0 0
EXZ 0 0
LCV 53 72
PCV 0 0
CS 0 0
LES 3202041
ES 3202041
SES 3202060
SEFS 3202102
BES 0
UAS 3202160
HDLC configuration:
Policing bucket: Disabled
Shaping bucket : Disabled
Giant threshold: 1514, Runt threshold: 0
Timeslots : All active
Line encoding: B8ZS, Byte encoding: Nx64K
Buildout : 0 to 132 feet
Data inversion: Disabled, Idle cycle flag: flags, Start end flag: shared
DS1 BERT configuration:
BERT time period: 10 seconds, Elapsed: 0 seconds
Induced Error rate: 10e-0, Algorithm: 2^15 - 1, O.151, Pseudorandom (9)
Packet Forwarding Engine configuration:
Destination slot: 1, PLP byte: 4 (0x04)
Logical interface t1-1/2/0:19.0 (Index 91) (SNMP ifIndex 256) (Generation 115)
Flags: Hardware-Down Device-Down Point-To-Point SNMP-Traps Encapsulation: PPP
Protocol inet, MTU: 1500, Generation: 121, Route table: 0
Flags: Protocol-Down
Addresses, Flags: Dest-route-down Is-Preferred Is-Primary
Destination: 68.71.141.136/30, Local: 68.71.141.137, Broadcast: 68.71.141.139, Generation: 179
Meaning
The sample output shows very detailed interface information which includes where any errors might be occurring. The first line of the output indicates if the link is up. Sample output 1 and 2 show that both links are up. Sample output 3 shows that the link is down. The main sections of the output to examine are:
- DS1 alarms
- DS1 defects
- T1 media
Both sample output 1 and 2 show no DS1 alarms or defects. Sample output 3 shows AIS and LOF alarms and defects. For more information about AIS and LOF alarms and defects, see List of Common SONET Alarms and Errors.
Even though there are counts in the T1 media section of the output in sample output 1 and 2, the State column indicates that the media are OK. However, sample output 3, in which the link is down, shows that the AIS and LOF defects are active.
Monitor Statistics for a Channelized DS3 Interface
Purpose
To display the status of Channelized DS3 interfaces, use the following Junos OS CLI operational mode command:
Action
Sample Output
user@host> monitor interfaces t1-1/2/0:5 host Seconds: 35 Time: 19:02:34
Delay: 0/0/27
Interface: t1-1/2/0:5, Enabled, Link is Up
Encapsulation: PPP, Keepalives, Speed: T1
Traffic statistics: Current delta
Input bytes: 551635800 (1768 bps) [16596]
Output bytes: 4094623791 (71376 bps) [64020]
Input packets: 5234195 (2 pps) [211]
Output packets: 4872090 (8 pps) [147]
Encapsulation statistics:
Input keepalives: 6918 [1]
Output keepalives: 6893 [0]
LCP state: Opened
Error statistics:
Input errors: 47 [0]
Input drops: 0 [0]
Input framing errors: 0 [0]
Policed discards: 398 [0]
L3 incompletes: 0 [0]
L2 channel errors: 0 [0]
L2 mismatch timeouts: 0 [0]
Carrier transitions: 0 [0]
Output errors: 0 [0]
Output drops: 0 [0]
Aged packets: 0 [0]
Active alarms : None
Active defects: None
T1 statistics:
BPV 0 [0]
EXZ 0 [0]
LCV 538 [0]
PCV 0 [0]
CS 0 [0]
Next='n', Quit='q' or ESC, Freeze='f', Thaw='t', Clear='c', Interface='i'
Sample Output 2
user@host> monitor interface t1-0/3/3:2 host Seconds: 9 Time: 10:36:11 Delay: 3/3/3 Interface: t1-0/3/3:2, Enabled, Link is Up Encapsulation: Cisco-HDLC, Keepalives, Speed: T1 Traffic statistics: Current delta Input bytes: 2931288250 (43936 bps) [427] Output bytes: 9987968300 (93512 bps) [207] Input packets: 17017904 (106 pps) [14] Output packets: 20398890 (109 pps) [26] Encapsulation statistics: Input keepalives: 124817 [0] Output keepalives: 125405 [0] Error statistics: Input errors: 0 [0] Input drops: 0 [0] Input framing errors: 0 [0] Input runts: 0 [0] Input giants: 0 [0] Next='n', Quit='q' or ESC, Freeze='f', Thaw='t', Clear='c', Interface='i'
Sample Output 3
user@host> monitor t1-1/2/0:19 host Seconds: 9 Time: 19:05:23
Delay: 0/0/68
Interface: t1-1/2/0:19, Enabled, Link is Down
Encapsulation: PPP, Keepalives, Speed: T1
Traffic statistics: Current delta
Input bytes: 89198 (0 bps) [0]
Output bytes: 90532 (0 bps) [0]
Input packets: 6371 (0 pps) [0]
Output packets: 6448 (0 pps) [0]
Encapsulation statistics:
Input keepalives: 0 [0]
Output keepalives: 0 [0]
LCP state: Conf-req-sent
Error statistics:
Input errors: 271124 [0]
Input drops: 0 [0]
Input framing errors: 0 [0]
Policed discards: 266254 [0]
L3 incompletes: 0 [0]
L2 channel errors: 2 [0]
L2 mismatch timeouts: 2 [0]
Carrier transitions: 32 [0]
Output errors: 0 [0]
Output drops: 0 [0]
Aged packets: 0 [0]
Active alarms : AIS LOF
Active defects: AIS LOF
T1 statistics:
BPV 0 [0]
EXZ 0 [0]
LCV 72 [0]
PCV 0 [0]
CS 0 [0]
Interface warnings:
o Outstanding DS1 alarm(s)
o INET NCP is not Opened
o LCP state is not Opened
Next='n', Quit='q' or ESC, Freeze='f', Thaw='t', Clear='c', Interface='i'
Meaning
The sample output shows common interface failures, indicates whether loopback is detected, and shows increases in framing errors. Use information from this command to help narrow down possible causes of an interface problem.
The output in the examples is static, however, the counters in real time change as they are updated every second. The counters in sample output 3 show that there is no traffic for the interface that is down, and that it has active alarms, defects, and there are interface warnings.
 | Note: If you are accessing the router from the console connection, make sure you set the CLI terminal type using the set cli terminal command. |
 | Caution: We recommend that you use this command only for diagnostic purposes. Do not leave it on during normal router operations because real-time monitoring of traffic consumes additional CPU and memory resources. |
