# Monitoring Interfaces

To display statistics for channelized SONET and SDH interfaces, use the show controllers sonet command. The following section describes some of the options for the command and shows some sample displays.

From User Exec mode, use the following show commands to monitor and display the T3, T1/E1, and HDLC serial data channel information:

- Display E1 or T1 statistics for E1 or T1 over a VT.
  host1#show controllers sonet 2/0 e1
- Display T3 statistics.
  host1#show controllers sonet 2/1 ds3
- Display statistics for the section, line, path, and tributary layers.
  host1#show controllers sonet 2/1 section
- Display the configuration for channelized SONET and SDH interfaces.
  host1#show controllers sonet 2/0 configuration
- Display statistics for serial interfaces.
  host1#show interfaces serial 2/0:1/1/1/1/1

## Setting a Baseline

You can set statistics baselines for serial interfaces, subinterfaces, and circuits using the baseline interface serial command. You can also set statistics baselines for the section, line, and path layers using the baseline interface sonet command. Use the delta options with the show commands to display statistics with the baseline subtracted.

## Output Filtering

You can use the output filtering feature of the show command to include or exclude lines of output based on a text string you specify. See Command Line Interface in JunosE System Basics Configuration Guide, for details.

baseline interface serial

- Use to set a statistics baseline for serial interfaces.
- The router implements the baseline by reading and storing the statistics at the time the baseline is set and then subtracting this baseline whenever baseline-relative statistics are retrieved.
- Use the delta keyword with the show interfaces serial command to view the baseline statistics.
- Example
  host1#baseline interface serial 2/0:1/1
- There is no no version.
- See baseline interface.

baseline line interface sonet

- Use to set a statistics baseline for the SONET/SDH line layer.
- The router implements the baseline by reading and storing the MIB statistics at the time the baseline is set and then subtracting this baseline whenever baseline-relative statistics are retrieved.
- Use the total [ delta ] keywords with the show controllers sonet line command to view the baseline statistics.
- Example
  host1#baseline line interface sonet 2/0
- There is no no version.
- See baseline line interface sonet.

baseline line path interface sonet

- Use to set a statistics baseline for the SONET/SDH path layer.
- The router implements the baseline by reading and storing the MIB statistics at the time the baseline is set and then subtracting this baseline whenever baseline-relative statistics are retrieved.
- Use the total [ delta ] keywords with the show controllers sonet path command to view the baseline statistics.
- Example
  host1#baseline path interface sonet 2/0:1
- There is no no version.
- See baseline path interface sonet.

baseline line section interface sonet

- Use to set a statistics baseline for the SONET/SDH section layer.
- The router implements the baseline by reading and storing the MIB statistics at the time the baseline is set and then subtracting this baseline whenever baseline-relative statistics are retrieved.
- Use the total [ delta ] keywords with the show controllers sonet section command to view the baseline statistics.
- Example
  host1#baseline section interface sonet 2/0
- There is no no version.
- See baseline section interface sonet.

show controllers sonet configuration

- Use to display the configuration for channelized SONET and SDH interfaces.
- Specify an interface in slot/port format.
- To view information for a controller and all layers above that controller, specify a controller. For example, to view all controllers on interface 3/0, use show controllers sonet 3/0 configuration. To view information for path 1 only, use show controllers sonet 3/0:1 configuration.
- Field descriptions
  - Interface specifier in slot/port format
  - channelized—Number of channels and speed for the interface
  - ifAdminStatus—Configured status of the interface: up or down
  - description—Configured description of the controller
  - snmp trap link-status—State of SNMP link status processing for the section and line layers of the interface: enabled or disabled
  - alarms used for operational status calculation—Types of defects that the router uses to determine the operational status of the interface at the section and line layers
  - defect trigger soaking delay—Time that the router waits to set an alarm when the router records a defect at the section or line layer
  - Operational Status—Physical state of the interface:
    - up—Interface is operational
    - down, failure alarm—Interface is not operational; type of defect that caused failure is specified
    - time since last status change—Time the controller has been in the current physical state
  - Loopback State—Type of loopback configured at this layer in the interface, or none
  - Last Remote Loopback Request Sent
  - BERT test—Number of current test and total number of tests
    - Test interval—Length of the BERT test
    - status—Sync (controller is synchronized with remote device) or NoSync (controller is not synchronized with remote device
    - Sync count—Number of times the pattern detector synchronized with the incoming data pattern
    - Received bit count—Number of bits received
    - Error bit count—Number of bits with errors
  - Mode—Type of interface: SONET or SDH
  - Timing source—Type of clock source configured for the channel:
    - internal module—Internal clock is from the line module itself
    - chassis—Internal clock is from the configured router clock
  - Current section alarms—Number of suspect bit patterns found in several consecutive frames in section layer, or none
  - Current line alarms—Number of suspect bit patterns found in several consecutive frames in line layer
  - Channel configuration—Parameters for specific controllers; the actual parameters depend on the controller.
  - ifAdminStatus—State of the controller in the software configuration: up or down
  - ifOperStatus—Physical state of the controller: up or down
  - Time since last status change—Time the controller has been in the current physical state
  - Alarms—Number of suspect bit patterns found in several consecutive frames
  - snmp trap link-status—State of SNMP link status processing for the controller: enabled or disabled
  - alarms used for operational status calculation—Types of defects that the router uses to determine the operational status of the interface at the path layer
  - defect trigger soaking delay—Time that the router waits to set an alarm when the router records a defect at the path layer
  - c2 byte—Setting of path signal byte: set by upper interface type (automatic setting) or configured value
  - Operational Status—Physical state of this layer: up, down, or lowerLayerDown
    - time since last status change—Time the controller has been in the current physical state
  - Framing—Type of framing configured for the controller:
    - c-bit parity framing (for T3 interfaces)
    - M23 multiplexer framing (for T3 interfaces)
    - crc4—Cyclic redundancy check (for E1 interfaces)
    - no-crc4—No cyclic redundancy check (for E1 interfaces)
    - esf—Extended superframe (for T1 interfaces)
    - sf—Superframe (for T1 interfaces)
  - Line Code—Type of line coding the router assigned to the controller: B8ZS or AMI
  - Clock source—Type of clock source configured for the channel:
    - module—Internal clock is from the line module itself
    - chassis—Internal clock is from the configured router clock
  - J1 transmit trace message—Trace message sent to the remote device
  - J1 expected trace message—Trace message expected from the remote device
  - J1 received trace message—Trace message received from the remote device
- Example 1

      host1#show controllers sonet 3/0 configuration
      oc12 3/0
      non channelized
      ifAdminStatus: up
      description: link1
      snmp trap link-status: enabled
      alarms used for operational status calculation: LOS LOF AIS RDI
      defect trigger soaking delay: 2500 milliseconds
      Operational Status: up
            time since last status change: 00:03:30
      Loopback State: none
      Mode: sonet
      Timing source: internal module
      Receive FIFO Overruns: 0, Reconfigurations: 0
      Current section defects: none
      Current line    defects: none

      Channel configuration:
      channel = 0, path = oc12, hierarchy = 1/1/0/0, current path defects: none
       ifAdminStatus: up
       snmp trap link-status: disabled
       alarms used for operational status calculation: LOP AIS
       defect trigger soaking delay: 2500 milliseconds
       c2 byte override 20
       Operational Status: up
             time since last status change: 00:03:30
       J1 transmit trace message: sonet3/0
       J1 expected trace message: sonet4/0
       J1 received trace message: sonet4/0

- Example 2—If you do not specify the layer in the interface, the router shows the configuration for all layers, whether or not you specify the keyword configuration.

      host1#show controllers sonet 2/1
      oc3 2/1
      channelized (3 channels, oc1 minimum speed)
      ifAdminStatus: up
      description: link1
      snmp trap link-status: enabled
      alarms used for operational status calculation: LOS LOF AIS RDI
      defect trigger soaking delay: 2500 milliseconds
      Operational Status: up
            time since last status change: 00:03:30
      Operational Status: up
            time since last status change: 00:06:49
      Loopback State: none
      Mode: sonet
      Timing source: internal module
      Current section alarms: none
      Current line alarms   : none

      Channel configuration:
      channel = 1, path = oc1, hierarchy = 1/1/1/1, current path alarms: none
       ifAdminStatus: up
       snmp trap link-status: disabled
       alarms used for operational status calculation: LOP AIS
       defect trigger soaking delay: 2500 milliseconds
       c2 byte override 20
      Operational Status: up
             time since last status change: 00:06:49
      Ds3 1, unchannelized
       ifOperStatus =  ifOperUp
       snmp trap link-status = disabled
       Framing is C-BIT, Line Code is B3ZS, Clock Source is Internal - Module

- Example 3—This example displays the configuration for T3 1/1 on slot 2, port 1.

      host1#show controllers sonet 2/1:1/1
      oc3 2/1
      channelized (3 channels, oc1 minimum speed)
      ifAdminStatus: up
      description: link1
      snmp trap link-status: enabled
      alarms used for operational status calculation: LOS LOF AIS RDI
      defect trigger soaking delay: 2500 milliseconds
      Operational Status: up
            time since last status change: 00:03:30
      Loopback State: none
      Mode: sonet
      Timing source: internal module
      Current section alarms: none
      Current line alarms   : none

      Channel configuration:
      channel = 1, path = oc1, hierarchy = 1/1/1/1, current path alarms: none
       ifAdminStatus: up
       snmp trap link-status: disabled
       alarms used for operational status calculation: LOP AIS
       defect trigger soaking delay: 2500 milliseconds
       c2 byte override 20
      Operational Status: up
             time since last status change: 00:05:37
      Ds3 1, unchannelized
       ifOperStatus =  ifOperUp
       snmp trap link-status = disabled
       Framing is C-BIT, Line Code is B3ZS, Clock Source is Internal - Module

- See show controllers sonet.

show controllers sonet ds1|e1

- Use to display E1 or T1 (DS1) statistics for the different layers in channelized SONET and SDH interfaces. Figure 8 shows the layers in the interface.
- For definitions of the MIB statistics, see RFC 2495—Definitions of Managed Objects for the DS1, E1, DS2 and E2 Interface Types (January 1999).
- Specify an interface in slot/port format.
- To view information for a specific controller in a layer, enter the specifier for the controller and the type for the controller. For example, to view the E1 controller 1/1/1 on path 1 on the interface 4/0, enter show controllers sonet 4/0:1/1/1/1 e1.
- To view information for all controllers above a particular layer, enter the specifier for the layer and the type for the controller. For example, to view all E1 controllers on the interface 4/0 path 1, enter show controllers sonet 4/0:1 e1.
- To view E1 or T1 statistics for a layer, specify the controller type, e1 or ds1.
- To view the configuration for a controller or all controllers in a layer, omit the controller type.
- Field descriptions
  - Description—Text description or alias if configured for the interface
  - BERT test—Number of current test and total number of tests
    - Test interval—Length of the BERT test
    - status—Sync (controller is synchronized with remote device) or NoSync (controller is not synchronized with remote device
    - Sync count—Number of times the pattern detector synchronized with the incoming data pattern
    - Received bit count—Number of bits received
    - Error bit count—Number of bits with errors
  - Number of valid intervals—Number of 15-minute intervals since the line module was last powered on or reset
  - Time elapsed in current interval—Reported in 15-minute intervals
  - Errored seconds—Number of errored seconds encountered by a T1 or an E1 in the current interval
  - Severely errored seconds—Number of severely errored seconds encountered by a T1 or an E1 in the current interval
  - Severely errored frame seconds—Number of severely errored framing seconds encountered by a T1 or an E1 in the current interval
  - Unavailable seconds—Number of unavailable seconds encountered by a T1 or an E1 in the current interval
  - Clock slip seconds—Number of clock slips encountered by a T1 or an E1 in the current interval
  - Path code violations—Number of coding violations encountered by a T1 or an E1 in the current interval
  - Line errored seconds—Number of line errored seconds encountered by a T1 or an E1 in the current interval
  - Bursty errored seconds—Number of bursty errored seconds encountered by a T1 or an E1 in the current interval
  - Degraded minutes—Number of minutes that a T1 or an E1 line is degraded
  - Line code violations—Number of line code violations encountered by a T1 or an E1 in the current interval
- Example—This example displays statistics for all the E1 lines on the interface 2/0.

      host1#show controllers sonet 2/0 e1
      E1 1/1/1

      Description: boston111 e1
      BERT test - 2 in 11
      Test Interval 1 minute(s), Running - Status is Sync
      0 minute(s), 33 second(s) left in test interval
      Sync count         = 1
      Received bit count = 41472000
      Error bit count    = 0

       Number of valid interval - 0
       Time elapse in current interval - 0

      Current Interval Counters
      Errored seconds                  = 0
      Severely errored second          = 0
      Severely errored frame seconds   = 0
      Unavailable seconds              = 0
      Clock slip seconds               = 0
      Path code violations             = 0
      Line errored seconds             = 0
      Bursty errored seconds           = 0
      Degraded minutes                 = 0
      Line code violations             = 0

      24 Hour Total Counters
      Errored seconds                  = 0
      Severely errored second          = 0
      Severely errored frame seconds   = 0
      Unavailable seconds              = 0
      Clock slip seconds               = 0
      Path code violations             = 0
      Line errored seconds             = 0
      Bursty errored seconds           = 0
      Degraded minutes                 = 0
      Line code violations             = 0

- See show controllers sonet.

show controllers sonet ds3

- Use to display T3 statistics for the different layers in channelized SONET and SDH interfaces. Figure 8 shows the layers in the interface.
- For definitions of the MIB statistics, see RFC 2496—Definitions of Managed Objects for the DS3/E3 Interface Types (January 1999).
- Specify an interface in slot/port format.
- To view information for a specific controller in a layer, enter the specifier for the controller and the type for the controller. For example, to view T3 controller 1 on path 1 on the interface 4/0, enter show controllers sonet 4/0:1/1 ds3.
- To view information for all controllers above a particular layer, enter the specifier for the layer and the type for the controller. For example, to view all DS3 controllers on the interface 4/0, enter show controllers sonet 4/0 ds3.
- To view T3 statistics for a layer, specify the controller type, ds3.
- To view the configuration for a controller or all controllers in a layer, omit the controller type.
- Field descriptions
  - Description—Text description or alias if configured for the interface
  - BERT test—Number of current test and total number of tests
    - Test interval—Length of the BERT test
    - status—Sync (controller is synchronized with remote device) or NoSync (controller is not synchronized with remote device
    - Sync count—Number of times the pattern detector synchronized with the incoming data pattern
    - Received bit count—Number of bits received
    - Error bit count—Number of bits with errors
  - Number of valid intervals—Number of 15-minute intervals since the line module was last powered on or reset
  - Time elapse in current interval—Time (seconds) passed in current interval
  - Current Interval Counters—Statistics for the current 15-minute interval
  - P-bit errored seconds—Number of errored seconds encountered by a T3
  - P-bit severely errored seconds—Number of severely errored seconds encountered by a T3
  - Severely errored frame seconds—Number of severely errored framing seconds encountered by a T3
  - Unavailable seconds—Number of unavailable seconds encountered by a T3
  - Line code violations—Number of line code violations encountered by a T3
  - P-bit coding violations—Number of coding violations encountered by a T3
  - Line errored seconds—Number of line errored seconds encountered by a T3
  - C-bit coding violations—Number of C-bit coding violations encountered by a T3
  - C-bit errored seconds—Number of C-bit errored seconds encountered by a T3
  - C-bit severely errored seconds—Number of C-bit severely errored seconds encountered by a T3
  - 24 Hour Total counters—Statistics for last 24 hours
- Example 1—This example shows all T3 controllers on the interface 2/1.

      host1#show controllers sonet 2/1 ds3
      Ds3 1
      Description: ottawa211 ds3
       Number of valid interval - 0
       Time elapse in current interval - 696

      Current Interval Counters
      P-bit errored seconds          = 0
      P-bit severely errored seconds = 0
      Severely errored frame seconds = 0
      Unavailable seconds            = 541
      Line code violations           = 0
      P-bit coding violations        = 0
      Line errored seconds           = 0
      C-bit coding violations        = 0
      C-bit errored seconds          = 0
      C-bit severely errored seconds = 0

      24 Hour Total Counters
      P-bit errored seconds          = 0
      P-bit severely errored seconds = 0
      Severely errored frame seconds = 0
      Unavailable seconds            = 0
      Line code violations           = 0
      P-bit coding violations        = 0
      Line errored seconds           = 0
      C-bit coding violations        = 0
      C-bit errored seconds          = 0
      C-bit severely errored seconds = 0

- Example 2—This example shows statistics for the T3 controller 1/1 on interface 2/0.

      host1#show controllers sonet 2/0:1/1 ds3
      Ds3 1
      Description: ottawa2011 ds3
      Number of valid interval - 0
       Time elapse in current interval - 534

      Current Interval Counters
      P-bit errored seconds          = 0
      P-bit severely errored seconds = 0
      Severely errored frame seconds = 0
      Unavailable seconds            = 117
      Line code violations           = 0
      P-bit coding violations        = 0
      Line errored seconds           = 0
      C-bit coding violations        = 0
      C-bit errored seconds          = 0
      C-bit severely errored seconds = 0

      24 Hour Total Counters
      P-bit errored seconds          = 0
      P-bit severely errored seconds = 0
      Severely errored frame seconds = 0
      Unavailable seconds            = 0
      Line code violations           = 0
      P-bit coding violations        = 0
      Line errored seconds           = 0
      C-bit coding violations        = 0
      C-bit errored seconds          = 0
      C-bit severely errored seconds = 0

- See show controllers sonet.

show controllers sonet line | path | section | tributary

- Use to display statistics for the different layers in channelized SONET and SDH interfaces. Figure 8 shows the layers in the interface.
- For definitions of the MIB statistics, see RFC 2558—Definitions of Managed Objects for the SONET/SDH Interface Type (March 1999).
- Specify an interface in slot/port format.
- To view information for a specific controller in a layer, enter the specifier for the controller and the type for the controller. For example, to view tributary 1/1/1 on path 1 of interface 4/0, enter show controllers sonet 4/0:1/1/1/1 tributary.
- To view information for all controllers above a particular layer, enter the specifier for the layer and the type for the controller. For example, to view all tributaries on path 1 of interface 4/0, enter show controllers sonet 4/0:1 tributary.
- To view statistics for a layer, specify the type of layer.
- To view the configuration for a controller or all controllers in a layer, omit the controller type.
- To view all statistics for all sessions, specify the total keyword.
- To view baselined statistics for all intervals, specify the delta total keywords.
- Field descriptions
  - Current Interval Counters—Statistics for the current 15-minute interval
    - Errored seconds—Number of errored seconds encountered by a T1 or an E1 in an interval
    - Severly errored seconds—Number of severely errored seconds encountered in an interval
    - Severly errored framing seconds—Number of severely errored framing seconds encountered in an interval
    - Coding violations—Number of coding violations encountered in an interval
    - Unavailable seconds—Number of unavailable seconds encountered in an interval
  - Last Interval Counters—Statistics for the previous 15-minute interval
  - Current Far End Interval Counters—Statistics for the remote connection associated with the SONET/SDH path in the current 15-minute interval
  - Last Far End Interval Counters—Statistics for the remote connection associated with the SONET/SDH path in the previous 15-minute interval
  - Total interval counters—Shows the statistics for all intervals or baselined statistics
- Example 1—This example shows the MIB statistics for the section layer on interface 2/1.

      host1#show controllers sonet 2/1 section
      Current Section Interval Counters
      Current status                   = No Defect
      Errored seconds                  = 0
      Severly errored seconds          = 0
      Severely errored framing seconds = 0
      Coding violations                = 0

      Last Section Interval Counters
      Errored seconds                  = 0
      Severly errored seconds          = 0
      Severely errored framing seconds = 0
      Coding violations                = 0

- Example 2—This example illustrates the behavior of the baseline section interface sonet command. The examples show the MIB statistics of the section layer before and after the command is issued.

      host1#show controllers sonet 2/0 section total
      Number of valid intervals - 0
       Time elapsed in current interval - 192

      Current Section Interval Counters
      Current status                   = No Defect
      Errored seconds                  = 68
      Severly errored seconds          = 68
      Severely errored framing seconds = 2
      Coding violations                = 4018

      Total Section Counters
      Errored seconds                  = 68
      Severly errored seconds          = 68
      Severely errored framing seconds = 2
      Coding violations                = 4018

      host1#baseline section interface sonet 2/0

      host1#show controllers sonet 2/0 section total delta
      Number of valid intervals - 0
       Time elapsed in current interval - 209
      Current Section Interval Counters
      Current status                   = No Defect
      Errored seconds                  = 68
      Severly errored seconds          = 68
      Severely errored framing seconds = 2
      Coding violations                = 4018

      Total Section Counters
      Errored seconds                  = 0
      Severly errored seconds          = 0
      Severely errored framing seconds = 0
      Coding violations                = 0

- Example 3—This example shows the MIB statistics for the line layer on interface 2/1.

      host1#show controllers sonet 2/1 line
      Current Line Interval Counters
      Current status                   = No Defect
      Errored seconds                  = 0
      Severly errored seconds          = 0
      Coding violations                = 0
      Unavailable seconds              = 190
      Last Line Interval Counters
      Errored seconds                  = 0
      Severly errored seconds          = 0
      Coding violations                = 0
      Unavailable seconds              = 900

      Current Far End Line Interval Counters
      Errored seconds                  = 0
      Severly errored seconds          = 0
      Coding violations                = 0
      Unavailable seconds              = 0

      Far End Last Line Interval Counters
      Errored seconds                  = 0
      Severly errored seconds          = 0
      Coding violations                = 0
      Unavailable seconds              = 0

- Example 4—This example shows the MIB statistics for the path layer on interface 2/1.

      host1#show controllers sonet 2/1 path
      Channel number 1
      Current Path Interval Counters
      Current status                   = No Defect
      Errored seconds                  = 0
      Severly errored seconds          = 0
      Coding violations                = 0
      Unavailable seconds              = 248

      Last Path Interval Counters
      Errored seconds                  = 0
      Severly errored seconds          = 0
      Coding violations                = 0
      Unavailable seconds              = 0
      Current Far End Path Interval Counters
      Errored seconds                  = 0
      Severly errored seconds          = 0
      Coding violations                = 0
      Unavailable seconds              = 248

      Far End Last Path Interval Counters
      Errored seconds                  = 0
      Severly errored seconds          = 0
      Coding violations                = 0
      Unavailable seconds              = 0

- Example 5—This example displays the tributary statistics for all tributaries on interface 4/0, path 1.

      host1#show controllers sonet 4/0:1 tributary
      Tributary 1/1/1
      Current Tributary Interval Counters
      Errored seconds                  = 0
      Severly errored seconds          = 0
      Coding violations                = 0
      Unavailable seconds              = 0
      Last Tributary Interval Counters
      Errored seconds                  = 0
      Severly errored seconds          = 0
      Coding violations                = 0
      Unavailable seconds              = 0
      Current Far End Path Interval Counters
      Errored seconds                  = 0
      Severly errored seconds          = 0
      Coding violations                = 0
      Unavailable seconds              = 0
      Far End Last Tributary Interval Counters
      Errored seconds                  = 0
      Severly errored seconds          = 0
      Coding violations                = 0
      Unavailable seconds              = 0

- Example 6—This example displays the tributary statistics for the tributary 1/1/1 on path 1 on slot 4, port 0.

      host1#show controllers sonet 4/0:1/1/1/1 tributary
      Tributary 1/1/1
      Current Tributary Interval Counters
      Errored seconds                  = 0
      Severly errored seconds          = 0
      Coding violations                = 0
      Unavailable seconds              = 0
      Last Tributary Interval Counters
      Errored seconds                  = 0
      Severly errored seconds          = 0
      Coding violations                = 0
      Unavailable seconds              = 0
      Current Far End Path Interval Counters
      Errored seconds                  = 0
      Severly errored seconds          = 0
      Coding violations                = 0
      Unavailable seconds              = 0
      Far End Last Tributary Interval Counters
      Errored seconds                  = 0
      Severly errored seconds          = 0
      Coding violations                = 0
      Unavailable seconds              = 0

- See show controllers sonet.

show controllers sonet remote

- Use to display MIB statistics for the remote end of a channelized T3 interface configured for MDL or for the remote end of a T1 channel configured for FDL.
- Specify the all option to display detailed information for all 15-minute intervals.
- For definitions of the MIB statistics for a T3 connections, see RFC 2496—Definitions of Managed Objects for the DS3/E3 Interface Types (January 1999).
- For definitions of the MIB statistics for a T1 connections, see RFC 2495—Definitions of Managed Objects for the DS1, E1, DS2 and E2 Interface Types (January 1999).
- Field descriptions for a T3 interface
  - Far End MDL Carrier bit—Status of MDL configuration on remote device connected to T3 interface
    - set—MDL is configured for carrier mode
    - not set—MDL is not configured for carrier mode
  - Far End Equipment Identification Code—eic string sent by remote device for MDL
  - Far End Line Identification Code—lic string sent by remote device for MDL
  - Far End Frame Identification Code—fic string sent by remote device for MDL
  - Far End Unit Identification Code—unit string sent by remote device for MDL
  - Far End Facility Identification Code—pfi string sent by remote device for MDL
  - Far End Generator Number—generator string sent by remote device for MDL
  - Far End Port Number—port string sent by remote device for MDL
  - Number of valid intervals—Number of 15-minute intervals since the line module was last powered on or reset
  - Time elapse in current interval—Number of seconds that have passed in the 15-minute (900-second) interval
  - C-bit errored seconds—Number of C-bit errored seconds encountered by a T3 in the current interval
  - C-bit severely errored seconds—Number of C-bit severely errored seconds encountered by a T3 in the current interval
  - C-bit coding violations—Number of C-bit coding violations encountered by a T3 in the current interval
  - Unavailable seconds—Number of unavailable seconds encountered by a T3 in the current interval
  - Invalid seconds—Number of seconds when statistics were not collected
- Field descriptions for a T1 channel
  - DS1—Identifier of T1 channel
  - Number of valid intervals—Number of 15-minute intervals since the line module was last powered on or reset
  - Time elapse in current interval—Number of seconds that have passed in the 15-minute (900-second) interval
  - Far End FDL Carrier bit—Status of FDL configuration on remote device connected to T1 channel
    - set—FDL is configured for carrier mode
    - not set—FDL is not configured for carrier mode
  - Far End Equipment Identification Code—eic string sent by remote device for FDL
  - Far End Line Identification Code—lic string sent by remote device for FDL
  - Far End Frame Identification Code—fic string sent by remote device for FDL
  - Far End Unit Identification Code—unit string sent by remote device for FDL
  - Far End Facility Identification Code—pfi string sent by remote device for FDL
  - Far End Generator Number—generator string sent by remote device for FDL
  - Far End Port Number—port string sent by remote device for FDL
  - Errored seconds—Number of errored seconds encountered by a T1 in the current interval
  - Severely errored seconds—Number of severely errored seconds encountered by a T1 in the current interval
  - Severely errored frame seconds—Number of severely errored framing seconds encountered by a T1 in the current interval
  - Unavailable seconds—Number of unavailable seconds encountered by a T1 in the current interval
  - Clock slip seconds—Number of clock slips encountered by a T1 in the current interval
  - Path code violations—Number of coding violations encountered by a T1 in the current interval
  - number of coding violations encountered by a T1 in the current interval
  - Line errored seconds—Number of line errored seconds encountered by a T1 in the current interval
  - Bursty errored seconds—Number of bursty errored seconds encountered by a T1 in the current interval
  - Degraded minutes—Number of minutes that a T1 line is degraded
- Example 1—In this example, a T3 interface is specified.

      host1#show controllers sonet 5/0:1/1 remote
      Far End MDL Carrier bit is not set
      Far End Equipment Identification Code is the null string
      Far End Line Identification Code is the null string
      Far End Frame Identification Code is the null string
      Far End Unit Identification Code is the null string
      Far End Facility Identification Code is the null string
      Far End Generator Number is the null string
      Far End Port Number is the null string

      Number of valid interval - 3
      Time elapse in current interval - 756

      Ds3 Current Interval Counters
      C-bit errored seconds          = 0
      C-bit severely errored seconds = 0
      C-bit coding violations        = 0
      Unavailable seconds            = 0
      Invalid seconds                = 0

      Ds3 Last Interval Counters
      C-bit errored seconds          = 0
      C-bit severely errored seconds = 0
      C-bit coding violations        = 0
      Unavailable seconds            = 0
      Invalid seconds                = 0
      Ds3 24 Hour Total Counters
      C-bit errored seconds          = 1
      C-bit severely errored seconds = 1
      C-bit coding violations        = 330
      Unavailable seconds            = 0
      Invalid seconds                = 0

- Example 2—In this example, a T1 channel on a T3 over channelized SONET interface is specified.

      host1#show controllers sonet 5/0:1/1/1 remote
      DS1 10/1:1
      Number of valid interval - 0
      Time elapse in current interval - 0

      Far End FDL Carrier bit is not set
      Far End Equipment Identification Code is the null string
      Far End Line Identification Code is the null string
      Far End Frame Identification Code is the null string
      Far End Unit Identification Code is the null string
      Far End Facility Identification Code is the null string
      Far End Port Number is the null string
      Far End Generator Number is the null string

      DS1 Current Interval Counters
      Errored seconds                = 0
      Severely errored second        = 0
      Severely errored frame seconds = 0
      Unavailable seconds            = 0
      Clock slip seconds             = 0
      Path code violations           = 0
      Line errored seconds           = 0
      Bursty errored seconds         = 0
      Degraded minutes               = 0

      DS1 24 Hour Total Counters
      Errored seconds                = 0
      Severely errored second        = 0
      Severely errored frame seconds = 0
      Unavailable seconds            = 0
      Clock slip seconds             = 0
      Path code violations           = 0
      Line errored seconds           = 0
      Bursty errored seconds         = 0
      Degraded minutes               = 0

- Example 3—In this example, a T1 over channelized SONET interface is specified.

      host1#show controllers sonet 5/0:1/1/1/2/2 remote
      DS1 10/1:1
      Number of valid interval - 0
      Time elapse in current interval - 0

      Far End FDL Carrier bit is not set
      Far End Equipment Identification Code is the null string
      Far End Line Identification Code is the null string
      Far End Frame Identification Code is the null string
      Far End Unit Identification Code is the null string
      Far End Facility Identification Code is the null string
      Far End Port Number is the null string
      Far End Generator Number is the null string

      DS1 Current Interval Counters
      Errored seconds                = 0
      Severely errored second        = 0
      Severely errored frame seconds = 0
      Unavailable seconds            = 0
      Clock slip seconds             = 0
      Path code violations           = 0
      Line errored seconds           = 0
      Bursty errored seconds         = 0
      Degraded minutes               = 0

      DS1 24 Hour Total Counters
      Errored seconds                = 0
      Severely errored second        = 0
      Severely errored frame seconds = 0
      Unavailable seconds            = 0
      Clock slip seconds             = 0
      Path code violations           = 0
      Line errored seconds           = 0
      Bursty errored seconds         = 0
      Degraded minutes               = 0

- See show controllers sonet remote.

show interfaces serial

- Use to display information about the serial interfaces you specify.
- Field descriptions
  - Serial Interface—Location of the interface
  - Description—Text description or alias if configured for the interface
  - ifOperStatus—Physical state of the interface
    - ifOperDown—Interface is not functioning
    - ifOperLowerLayerDown—Lower layer in the interface stack is not functioning
    - ifOperNotPresent—Module has been removed from the chassis
    - ifOperTesting—Interface is being tested
    - ifOperUp—Interface is functioning
  - snmp trap link-status—Enabled or disabled
  - Encapsulation—Layer 2 encapsulation display; options: ppp, frame-relay ietf, mlppp, mlframe-relay ietf, hdlc
  - Crc type checking—Size of the CRC
  - Hdlc mru—Current size of the MRU
  - Hdlc mtu—Current size of the MTU
  - Hdlc interface speed—Current line speed of the interface
  - Hdlc idle-character—Current idle character
  - Invert data disabled—Status of the data inversion feature
  - Ds0 mode—Nx56 or Nx64
  - 5 minute input rate—Data rates based on the traffic received in the last five minutes
  - 5 minute output rate—Data rates based on the traffic sent in the last five minutes
  - Interface Statistics
    - Packets received—Number of packets received on the interface
    - Bytes received—Number of bytes received on the interface
    - Errored packets received—Number of packets with errors received on the interface
    - Packets sent—Number of packets sent on the interface
    - Bytes sent—Number of bytes sent on the interface
    - Errored packets sent—Number of packets with errors sent from the interface
- Example

      host1#show interfaces serial 2/0:1/1/1/1/1
      Serial Interface at 2/0:1/1/1/1/1
      Description: toronto20 hdlc channel
      ifOperStatus = ifOperUp
      snmp trap link-status = disabled
      Encapsulation hdlc
      Crc type checking - CRC16
      Hdlc mru = 1600
      Hdlc mtu = 1600
      Hdlc interface speed = 1536000
      Hdlc idle-character marks
      Invert data disabled, Ds0 time slot map = 0xffffff
      Ds0 mode = Nx64

      5 minute input rate 0 bits/sec, 0 packets/sec
      5 minute output rate 0 bits/sec, 0 packets/sec
      Interface statistics
      Packets received              100
      Bytes received                1300
      Errored packets received      1
      Packets sent                  100
      Bytes send                    1436
      Errored packets sent          0

- See show interfaces.

## Monitoring APS/MSP

For information about monitoring APS/MSP, see Monitoring APS/MSP in Configuring Unchannelized OCx/STMx Interfaces .