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http://batdosi.blogspot.com/2015/06/packet-capture-on-juniper-devices.html






Code Block
titletraceoptions
Configuration:
set protocols bfd traceoptions file spineXbfd.log
set protocols bfd traceoptions file world-readable
set protocols bfd traceoptions flag all


look at the traceoptions file: 

show log spineXbfd.log
show log spineXbfd.log | last

to see the file or transfer it:
file list /var/log/spineXbfd.log detail

file show /var/log/spineXbfd.log



monitor traffic 

http://batdosi.blogspot.com/2015/06/packet-capture-on-juniper-devices.html

Code Block
titlemonitoring traffic
{master:0}
root@Spine2> show bfd session
                                                  Detect   Transmit
Address                  State     Interface      Time     Interval  Multiplier
10.1.23.2                Up        xe-0/0/0.0     1.050     0.350        3
10.1.24.2                Up        xe-0/0/1.0     1.050     0.350        3

2 sessions, 2 clients
Cumulative transmit rate 5.7 pps, cumulative receive rate 5.7 pps


monitor traffic interface xe-0/0/0.0 matching "port 3784 or port 4784" detail