Find and Configure the Log File

By default, the syslog local-file is ram. The log file name is "message" which is in the directory "/tmp/log"

admin@XorPlus$cd /tmp/log
admin@XorPlus$ls
lastlog lighttpd messages wtmp

You can use "tail -f /tmp/log/messages" to display the log messages.

You can set the syslog local-file location to disk. The log file name is "messages" which is in the directory of "/var/log"

admin@XorPlus# set system syslog local-file disk 
admin@XorPlus# commit 
Commit OK.
Save done.
admin@XorPlus#
admin@XorPlus$cd /var/log/
admin@XorPlus$ls
apt dmesg fsck last_death lastlog messages news ntpstats wtmp
admin@XorPlus$

You can use "tail -f /var/log/messages" to show the log messages.

Enable Important Debugs

Enable debug interface：

##Global Interface traceoptions.
admin@XorPlus# set interface traceoptions flag
Possible completions:
  <[Enter]>                       Execute this command
  all                             Configure all tracing
  config                          Configure configuration tracing
  ethernet-switching-options      Configure ethernet-switching-options tracing
  neighbor-event                  Configure neighbor event tracing
  packets                         Configure received or sent packets event tracing
  port-security                   Configure port security tracing
  raw-packet                      Configure receive raw packet tracing
  route-event                     Configure route event tracing
  static-ethernet-switching       Configure static-ethernet-switching tracing
  timer                           Configure timer tracing

admin@XorPlus# set interface traceoptions flag config
  <[Enter]>                       Execute this command
  disable                         Disable configuration tracing

admin@XorPlus# set interface traceoptions flag config disable false
admin@XorPlus# commit 
Commit OK.
Save done.
admin@XorPlus# 
admin@XorPlus# set interface traceoptions line-card ?
Possible completions:
  <[Enter]>                       Execute this command
  statistic                       Configure line card statistic module trace
  trace-level                     Configure line card trace level
  trace-type                      Configure line card trace type

admin@XorPlus# set interface traceoptions line-card trace-level all disable false
admin@XorPlus# commit 
Commit OK.

Enable debug of protocals:

admin@Xorplus# set protocols 
Possible completions:
  <[Enter]>                       Execute this command
  arp                             Configure ARP
  bgp                             Configure BGP inter-domain routing
  dhcp                            Dynamic Host Configuration Protocol
  dot1x                           802.1x protocol
  igmp                            Configure the IGMP protocol
  igmp-snooping                   Configure the igmp snooping
  lacp                            Link Aggregation Control Protocol
  lldp                            Link Layer Discovery Protocol 802.1AB
  mlag                            Configure MLAG
  neighbour                       Configure Neighbour Discovery Protocol
  netconf                         Configure NETCONF
  ospf                            Configure the OSPF protocol
  ovsdb                           Enable OVSDB
  pim                             PIM protocol
  sflow                           Configure sflow
  snmp                            Simple network management protocol configuration
  spanning-tree                   Configure Spanning Tree
  static                          Configure static routes
  udld                            Unidirectional Link Detection Protocol
  vrrp                            Configure VRRP
admin@Xorplus# set protocols bgp traceoption updates in
admin@Xorplus# commit
Commit OK
Save Done!

Enable debug of LLDP:

## LLDP global traceoptions.
admin@Xorplus# set protocols lldp traceoptions flag 
Possible completions:
  <[Enter]>                       Execute this command
  all                             Configure all events and packets tracing
  configuration                   Configure configuration tracing
  message-in                      Configure received message tracing
  message-out                     Configure send message tracing
  state-change                    Configure LLDP state change tracing
admin@Xorplus# set protocols lldp traceoptions flag message-in disable false
admin@XorPlus# commit 
Commit OK.

Enable debug of LACP:

## LACP global traceoptions.
admin@Xorplus# set protocols lacp traceoptions flag  
Possible completions:
  <[Enter]>                       Execute this command
  all                             Configure all events and packets tracing
  configuration                   Configure configuration tracing
  fallback                        Configure FALLBACK tracing
  message-in                      Configure received message tracing
  message-out                     Configure send message tracing
  mlag                            Configure MLAG tracing
  state-change                    Configure LACP state change tracing
admin@Xorplus# set protocols lacp traceoptions flag message-in disable false
admin@XorPlus# commit 
Commit OK.



##LACP per interface traceoptions.
admin@Xorplus# set protocols lacp traceoptions interface ge-1/1/1 flag 
Possible completions:
  <[Enter]>                       Execute this command
  all                             Configure all events and packets tracing
  configuration                   Configure configuration tracing
  message-in                      Configure received message tracing
  message-out                     Configure send message tracing
  state-change                    Configure LACP state change tracing
admin@Xorplus# set protocols lacp traceoptions interface ge-1/1/1 flag configuration disable false
admin@XorPlus# commit 
Commit OK.

Enable debug of UDLD:

## UDLD global traceoptions.
admin@Xorplus# set protocols udld traceoptions 
Possible completions:
  <[Enter]>                       Execute this command
  all                             Configure all events and packets tracing
  configuration                   Configure configuration tracing
  event                           Configure event tracing
  packet                          Configure the sending/receiving packets tracing
  raw-packet                      Configure UDLD raw packet tracing
  state-change                    Configure state change tracing
  timer                           Configure UDLD timer tracing
admin@Xorplus# set protocols udld traceoptions event disable false
admin@XorPlus# commit 
Commit OK.

Enable debug of BGP:

admin@XorPlus# set protocols bgp traceoption ?
admin@XorPlus# set protocols bgp traceoption
Possible completions:
  <[Enter]>                       Execute this command
  bestpath                        BGP bestpath
  evpn                            EVPN
  keepalives                      BGP IPv4 neighbor to debug
  neighbor-events                 BGP Neighbor Events
  updates                         BGP updates
  zebra                           BGP zebra messages

admin@XorPlus# set protocols bgp traceoption updates in
admin@XorPlus# commit 
Commit OK.
Save done.
admin@XorPlus#

Enable debug of ospf:

admin@XorPlus# set protocols ospf traceoption ?
Possible completions:
  <[Enter]>                       Execute this command
  ism                             Configure tracing of OSPF interface state machine
  lsa                             Configure tracing of OSPF link state advertisement
  nsm                             Configure tracing of OSPF neighbor state machine
  packet                          Configure tracing of OSPF packets
  zebra                           Configure tracing of zebra information

admin@XorPlus# set protocols ospf traceoption packet all detail
admin@XorPlus# commit

Enable debug of stp:

admin@XorPlus# set protocols spanning-tree traceoptions interface ge-1/1/1 ?
Possible completions:
  <[Enter]>                       Execute this command
  all                             Configure all tracing operations
  bridge-detection-machine        Configure bridge detection state machine tracing
  configuration                   Configure configuration tracing
  events                          Configure events tracing
  message-in                      Configure receive message tracing
  message-out                     Configure send message tracing
  mlag                            Configure mlag tracing
  port-information-machine        Configure port information state machine tracing
  port-migration-machine          Configure port migration state machine tracing
  port-receive-machine            Configure port receive state machine tracing
  port-role-selection-machine     Configure port role selection state machine tracing
  port-role-transition-machine    Configure port role transition state machine tracing
  port-state-transition-machine   Configure port state transition state machine tracing
  port-transmit-machine           Configure port transmit state machine tracing
  state-machine-variables         Configure state machine variables tracing
  timers                          Configure timers tracing
  topology-change-machine         Configure topology change state machine tracing

admin@XorPlus# set protocols spanning-tree traceoptions interface ge-1/1/1 all disable false
admin@XorPlus# commit 
Commit OK.
Save done.
admin@XorPlus#

Enable debug of igmp:

admin@XorPlus# set protocols igmp traceoption ?
Possible completions:
  <[Enter]>                       Execute this command
  events                          IGMP protocol events
  packets                         IGMP protocol packets
  trace                           IGMP internal daemon activity

admin@XorPlus# set protocols igmp traceoption events
admin@XorPlus# commit 
Commit OK.
Save done.
admin@XorPlus#

Find the Core Dump File

When the device crashes, it will create a core file which can be found in a directory called pica/core.

admin@R2:/pica/core$ pwd
/pica/core

Find the last_death file for Troubleshooting

You can view the last_death file after the device crashes. It will record the last log message and is located in /var/log directory.

admin@R2:/pica/core$ cd /var/log/
admin@R2:/var/log$ ls
btmp   faillog  fsck        lastlog   messages  report_diag.log
dmesg  frr      last_death  lighttpd  private   wtmp

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