It is not always possible to know there the interesting data is on a router and this whould take up an example of how to gather the trafficflow thru the router, by using snmpwalk and snmpget.<\/p>\n
Preconditions:<\/p>\n
Router at IP: 192.168.0.1, we name it FVS338. We have access to it by using the community: “public”.<\/p>\n
One way if we don’t know the services supported by the router we can list everything and then take what we need. I for example thought this was interesting. By using the MIB’s found on the internet (this was the TCP-MIB, usaly found in linux: \/usr\/share\/snmp\/mibs\/TCP-MIB.txt), I can see that this gives the outTraffic. At the router i have another .3 I have to add, since this have 4 network ports. The port 3 is for my WAN.<\/p>\n OID value is another way to put the actual path in the structure where this SNMP value is.<\/p>\n So my whould be: <\/p>\n Now we have to check that it is possible to use snmpget since this is what MRTG uses. Since we didn’t get any error, and see the value, this should be working. Now add it to the mrtg.cfg file: Don’t forget to add the TCP-MIB in your configuration aswell, an example:<\/p>\n The complete configurations could look like:<\/p>\n It is not always possible to know there the interesting data is on a router and this whould take up an example of how to gather the trafficflow thru the router, by using snmpwalk and snmpget. Preconditions: Router at IP: 192.168.0.1, we name it FVS338. We have access to it by using the community: “public”. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[84,82,85],"class_list":["post-1607","post","type-post","status-publish","format-standard","hentry","category-coding","tag-mib","tag-mrtg","tag-snmp"],"_links":{"self":[{"href":"https:\/\/www.lightsoftai.com\/index.php?rest_route=\/wp\/v2\/posts\/1607","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lightsoftai.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lightsoftai.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lightsoftai.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lightsoftai.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1607"}],"version-history":[{"count":1,"href":"https:\/\/www.lightsoftai.com\/index.php?rest_route=\/wp\/v2\/posts\/1607\/revisions"}],"predecessor-version":[{"id":1608,"href":"https:\/\/www.lightsoftai.com\/index.php?rest_route=\/wp\/v2\/posts\/1607\/revisions\/1608"}],"wp:attachment":[{"href":"https:\/\/www.lightsoftai.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1607"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lightsoftai.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1607"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lightsoftai.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1607"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nsnmpwalk -c public -v 1 192.168.0.1 .1<\/code><\/p>\n
\n
\nIF-MIB::ifOutOctets.1 = Counter32: 96463214
\nIF-MIB::ifOutOctets.2 = Counter32: 0
\nIF-MIB::ifOutOctets.3 = Counter32: 2549561770
\nIF-MIB::ifOutOctets.4 = Counter32: 3927692041
\n<\/code><\/p>\n
\n
\n
\nOID value: 1.3.6.1.2.1.2.2.1.16
\n<\/code>
\n
\nOID description:
\n
\nifOutOctets OBJECT-TYPE
\n SYNTAX Counter
\n ACCESS read-only
\n STATUS mandatory
\n DESCRIPTION
\n \"The total number of octets transmitted out of the
\n interface, including framing characters.\"
\n ::= { ifEntry 16 }
\n<\/code><\/p>\n
\n
\nOID: 1.3.6.1.2.1.2.2.1.16.3 or ifOutOctets.3
\n<\/code><\/p>\n
\n
\nsnmpget -c public -v 1 192.168.0.1 ifOutOctets.3
\nIF-MIB::ifOutOctets.3 = Counter32: 2550004051
\n<\/code><\/p>\n
\n(I also used the inTraffic for the WAN port named: 1.3.6.1.2.1.2.2.1.10 which means that there is 2 values added to the mrtg.<\/p>\n
\nTarget[router.traffic]: 1.3.6.1.2.1.2.2.1.16.3&1.3.6.1.2.1.2.2.1.10.3:public@192.168.0.1
\n<\/code><\/p>\n
\nLoadMIBs: \/usr\/share\/snmp\/mibs\/UCD-SNMP-MIB.txt,\/usr\/share\/snmp\/mibs\/TCP-MIB.txt
\n<\/code><\/p>\n
\nLoadMIBs: \/usr\/share\/snmp\/mibs\/UCD-SNMP-MIB.txt,\/usr\/share\/snmp\/mibs\/TCP-MIB.txt
\nTarget[router.traffic]: 1.3.6.1.2.1.2.2.1.16.3&1.3.6.1.2.1.2.2.1.10.3:public@192.168.0.1
\nTitle[router.traffic]: Traffic Load on Router
\nPageTop[router.traffic]: Traffic Load on Router<\/H1>
\nMaxBytes[router.traffic]: 10250000
\nShortLegend[router.traffic]: Bytes
\nYLegend[router.traffic]: Traffic Load
\nLegend1[router.traffic]: Current Traffic load
\nLegendI[router.traffic]: In
\nLegendO[router.traffic]: Out
\nOptions[router.traffic]: growright
\n#Unscaled[router.traffic]: ymwd
\n#Suppress[router.traffic]: my
\n<\/code><\/p>\n","protected":false},"excerpt":{"rendered":"