Juniper PHYSICAL LAYER - CONFIGURATION GUIDE V11.1.X Configuration Manual page 65

ifOperDown Interface is not functioning
ifOperLowerDown Lower layer in the interface stack is not functioning
snmp trap link-status Enabled or disabled
Encapsulation Layer 2 encapsulation display; options include: 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 time slot map Channelized T1 or E1 channel group
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 0/1:2 brief
Serial Interface at 0/1:2
Description: ottawa012 hdlc channel
ifOperStatus = ifOperUp
snmp trap link-status = disabled
Encapsulation hdlc
Crc type checking - CRC16
Hdlc mru = 1600
Hdlc mtu = 1600
Hdlc interface speed = 768000
Hdlc idle-character marks
Chapter 1: Configuring Channelized T3 Interfaces
Monitoring Interfaces
43