Perform link health check

Health checks can be performed on all types of links. The following example shows a health check configuration on top of two IPSec VPN links, “fcs-0-phase-1” and “fcs-1- phase-1”, respectively.

Use hmon hchk to send probes to a specific target to measure:

• The maximum, minimum, or average latency for a given period.
• The maximum, minimum, or average packet loss rate for a given period.
• The latency variation (jitter) for a given period.

Paramerter	Descriptions
protocol {ping | http | dns}	The protocol used for status check.
interval	The monitoring interval in seconds. The valid value range is 1—3600; the default is 5.
probe-cnt	The number of probes sent within the interval. The valid range is 1—10; the default is 1.
probe-tm	The timeout for a probe in seconds. The valid value range is 1—10; the default is 2.
*probe-target	The target to which a probe is sent.
port	The port number used to communicate with the server. The valid value range is 165535; the default is 80.
http-get	The URL used to communicate with the server. The default is /.
*interface	The outbound interface of probe packets.
src-type {none | interface | ip}	Specify the way to set the source address for probes.
src-iface	Set the source address as the address derived from the specified interface.
src-ip	Set the source address as a specific IP.
filter {rtt | loss}	Specify the desired filter.

Example health monitor health check configurations:

config hmon hchk
    edit fcs-0-phase-1-chk
        set protocol ping
        set interval 5
        set probe-cnt 1
        set probe-tm 2
        set probe-target 34.207.95.79
        set interface fcs-0-phase-1
        set src-type interfce
        set src-iface lan
        set filter rtt loss
    next
    edit fcs-1-phase-1-chk
        set protocol ping
        set interval 5
        set probe-cnt 1
        set probe-tm 2
        set probe-target 34.207.95.79
        set interface fcs-1-phase-1
        set src-type interfce
        set src-iface lan
        set filter rtt loss
    next
end

You can get the health check status for the above configurations using the following command:

FX04DA5918004433 # get hmon hchk fcs-0-phase-1
   median rtt:       avg      max      min      now       sd     am/s
fcs-0-phase-1:  141.00ms 151.62ms 127.73ms 132.06ms   7.28ms     19.4
  packet loss:       avg      max      min      now
fcs-0-phase-1:        0%       0%       0%       0%

FX04DA5918004433 # get hmon hchk fcs-1-phase-1
   median rtt:       avg      max      min      now       sd     am/s
fcs-1-phase-1:  121.27ms 133.56ms 108.98ms 115.86ms 8.49ms 14.3
  packet loss:       avg      max      min      now
fcs-1-phase-1:        0%       0%       0%       0%