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
`set protocol {ping \| http \| dns}`	The protocol used for status check.
`set port`	The port number used to communicate with the server. Valid range is 1 - 65535. The default is 80.
`set http-get`	The URL used to communicate with the server. The default is /.
*interface <interface_name>	The name of the interface.
interval	The monitoring interval in seconds. The valid 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 range is 1–10. The default is 2.
*probe_target	The target to which a probe is sent.
src_iface	The source address derived from the specified interface.
filter {rtt \| loss}	Filter by `rtt`—Round Trip Time. `loss`—Packet loss.

Example health monitor health check configurations:

config hmon hchk
edit fcs-0-phase-1-chk
    set protocol ping
        set interval 10
        set probe_cnt 5
        set probe_tm 2
        set probe_target 34.207.95.79
        set interface fcs-0-phase-1
        set src_iface lan
        set filter loss rtt
    next
edit fcs-1-phase-1-chk
    set protocol ping
        set interval 10
        set probe_cnt 5
        set probe_tm 2
        set probe_target 34.207.95.79
        set interface fcs-1-phase-1
        set src_iface lan
        set filter loss rtt
    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%

Perform link health check

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

set protocol {ping | http | dns}

The protocol used for status check.

set port

The port number used to communicate with the server. Valid range is 1 - 65535. The default is 80.

set http-get

The URL used to communicate with the server. The default is /.

*interface <interface_name>

The name of the interface.

interval

The monitoring interval in seconds. The valid 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 range is 1–10. The default is 2.

*probe_target

The target to which a probe is sent.

src_iface

The source address derived from the specified interface.

filter {rtt | loss}

Filter by

rtt—Round Trip Time.
loss—Packet loss.

Example health monitor health check configurations:

config hmon hchk edit fcs-0-phase-1-chk set protocol ping set interval 10 set probe_cnt 5 set probe_tm 2 set probe_target 34.207.95.79 set interface fcs-0-phase-1 set src_iface lan set filter loss rtt next edit fcs-1-phase-1-chk set protocol ping set interval 10 set probe_cnt 5 set probe_tm 2 set probe_target 34.207.95.79 set interface fcs-1-phase-1 set src_iface lan set filter loss rtt 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%

Admin Guide

Perform link health check

Perform link health check

Example health monitor health check configurations:

Perform link health check

Example health monitor health check configurations: