• Википедия: Multi Router Traffic Grapher
• Bog BOS: Мониторинг загрузки каналов MRTG

• Установка и запуск сервера Apache

server# apt install mrtg

server# cfgmaker public@router > /etc/mrtg.cfg

server# cat /etc/mrtg.cfg

...
WorkDir: /var/www/html/mrtg/
...

server# mkdir /var/www/html/mrtg/

server# indexmaker /etc/mrtg.cfg > /var/www/html/mrtg/index.html

root@server:~# cat /etc/cron.d/mrtg
...

server# cat /var/www/html/mrtg/*.log

# Target[router_1]: 3:public@router:::::2   # For Gigabit Interfaces
### Interface 1 >> Descr: 'FastEthernet0/1' | Name: 'Fa0/1' | Ip: '' | Eth: '00-0d-29-e7-7e-01' ###

Target[switch.cpu_load]: 1.3.6.1.4.1.9.2.1.56.0&1.3.6.1.4.1.9.2.1.57.0:public@switch:
MaxBytes[switch.cpu_load]: 100
Title[switch.cpu_load]: switch (switch): CPU
Options[switch.cpu_load]: gauge, nopercent
PageTop[switch.cpu_load]: <H1>Analysis for switch CPU load
 </H1>
 <TABLE>
   <TR><TD>System:</TD><TD>switch in AIS lab., BMSTU</TD></TR>
   <TR><TD>Maintainer:</TD><TD>root@gate.corpX.un</TD></TR>
   <TR><TD>Interface:</TD><TD>CPU</TD></TR>
   <TR><TD>IP:</TD><TD>switch (switch)</TD></TR>
   <TR><TD>Max load:</TD>
       <TD>100%</TD></TR>
  </TABLE>

Target[195.19.32.193_temp]:1.3.6.1.4.1.9.9.13.1.3.1.3.1&.1.3.6.1.4.1.9.9.13.1.3.1.3.2:public@195.19.32.193
SetEnv[195.19.32.193_temp]: MRTG_INT_DESCR="Temperature"
Title[195.19.32.193_temp]: Temperature -- 7206
#Directory[195.19.32.193_temp]:
MaxBytes[195.19.32.193_temp]: 100
Options[195.19.32.193_temp]: nopercent,growright, gauge, absolute
#Unscaled[195.19.32.193_temp]: dwmy
YLegend[195.19.32.193_temp]: Temperature (Gr C)
ShortLegend[195.19.32.193_temp]: Gr
Legend1[195.19.32.193_temp]: Avg Temperature Inlet 
Legend2[195.19.32.193_temp]: Avg Temperature Outlet 
Legend3[195.19.32.193_temp]: Max Temperature Inlet 
Legend4[195.19.32.193_temp]: Max Temperature Outlet 
LegendI[195.19.32.193_temp]: Temperature Inlet 
LegendO[195.19.32.193_temp]: Temperature Outlet 

# cat /etc/mrtg-dhcp-stat.sh

#!/bin/sh

#CMD='rsh router show ip dhcp binding | grep 192.168 | wc -l'
#MAX=9
#CUR=`eval $CMD`

#CMD='/usr/bin/dhcpd-pools -l /var/lib/dhcp/dhcpd.leases -c /etc/dhcp/dhcpd.conf -f c | grep 192.168.X.'
#CMD='/usr/local/bin/dhcpd-pools -l /var/db/dhcpd/dhcpd.leases -c /usr/local/etc/dhcpd.conf -f c | grep 192.168.X.'
#MAX=`eval $CMD | cut -d'"' -f8`
#CUR=`eval $CMD | cut -d'"' -f10`

echo $MAX
echo $CUR
echo 0
echo 0

# cat mrtg.cfg

...
Target[dhcp-stat]: `/etc/mrtg-dhcp-stat.sh`
Title[dhcp-stat]: dhcp stat (ip)
PageTop[dhcp-stat]: <H1>dhcp stat (ip)</H1>
Options[dhcp-stat]: nobanner,gauge,noinfo,nopercent
MaxBytes[dhcp-stat]: 10
Unscaled[dhcp-stat]: dwmy
YLegend[dhcp-stat]: Hosts (ip)
ShortLegend[dhcp-stat]: ip
LegendI[dhcp-stat]: dhcp leased
LegendO[dhcp-stat]: max ip in pool