Juniper JUNOSE 11.1.X - LINK LAYER CONFIGURATION 4-7-2010 Configuration Manual page 544

JUNOSe 11.1.x Link Layer Configuration Guide
512
Monitoring Cisco HDLC
lower-layer-down Displays interfaces with operational status
LowerLayerDown
not-present Displays interfaces with operational status NotPresent
open Displays interfaces with administrative status Open
up Displays interfaces with operational status Up
full Displays configuration information, status, and statistics
filter Specifies a CLI output filter
Field descriptions
interface status State of the interface:
Up—Traffic can flow on the interface
Down—Traffic cannot flow because of a problem in the interface at the
current protocol layer
LowerLayerDown—Traffic cannot flow because of a problem in an
interface at a lower protocol layer
NotPresent—Traffic cannot flow because hardware is unavailable
Interface administrative status Configured state of the interface:
Open no hdlc shutdown command is operative
Closed hdlc shutdown command is operative
Interface maximum-transmission-unit Configured MTU size
Interface keepalive time Configured keepalive interval value
Interface loop detection Status of loopback detection: enabled, disabled
Interface statistics:
packets in—Number of inbound packets received on the interface
packets out Number of outbound packets transmitted on the interface
octets in Number of inbound octets received on the interface
octets out—Number of outbound octets transmitted on the interface
errors in Number of inbound errors received on the interface
errors out Number of outbound errors transmitted on the interface
discards in Number of inbound packets discarded on the interface
discards out Number of outbound packets discarded on the interface
Example 1
host1#show hdlc interface serial 5/1:5/1
Cisco-HDLC interface serial 5/1:5/1 is LowerLayerDown