Arp Table by SNMP Job

Introduction

This job discovers the ARP table of a router using the SNMP protocol. This discovery reveals IP addresses by querying the protocol that translates IP addresses into the Ethernet addresses used by local area networks, as well as the host and network that it belongs to.

Adapter Information

Search for	Example	Results
A single word	`cat`	Topics that contain the word "cat". You will also find its grammatical variations, such as "cats".
A phrase. You can specify that the search results contain a specific phrase.	`"cat food"` (quotation marks)	Topics that contain the literal phrase "cat food" and all its grammatical variations. Without the quotation marks, the query is equivalent to specifying an OR operator, which finds topics with one of the individual words instead of the phrase.

Search for	Operator	Example
Two or more words in the same topic	`AND` `and` `+` (plus symbol) `&` (ampersand)	`cat AND dog` `"cat food"+milk` `"cat food"&"dog food"`
Either word in a topic	`OR` `or` `\|` (pipe)	`cat OR dog` `cat \| dog`
Topics that do not contain a specific word or phrase	`NOT` `not` `!` (exclamation point)	`NOT cat` `! dog`
Topics that contain one string and do not contain another	`^` (caret)	`cat ^ mouse`
A combination of search types	`( )` parentheses	`cat + (dog \| mouse)` `cat \| dog + (! mouse)`

Node Name	Condition
router	None
snmp	None
IpAddress	NOT IP Probe Name Is null

This job uses the Router ARP by SNMP adapter.

Triggered CI Data

Name	Value
credentialsId	${SOURCE.credentials_id}
host_id	${HOST.root_id}
ip_address	${SOURCE.application_ip}
netAddress	${SOURCE.application_ip}
port	${SOURCE.snmp_port}
retry	${SOURCE.snmp_retry}
snmpSupportMultiOid	${SOURCE.snmp_supportmultioid}
timeOut	${SOURCE.snmp_timeout}

Required Permissions

Permission	Operation	Usage Description	Objects and Parameters
SNMP	get	Discovers ipAddrEntry	iso.org.dod.internet.mgmt.mib-2.ip.ipAddrTable.ipAddrEntry: 1.3.6.1.2.1.4.20.1
SNMP	get	Discovers ARP table	iso.org.dod.internet.mgmt.mib-2.ip.ipNetToMediaTable.ipNetToMediaEntry.ipNetToMediaPhysAddress: 1.3.6.1.2.1.4.22.1.2
SNMP	get	Discovers ARP physical address	iso.org.dod.internet.mgmt.mib-2.at.atTable.atEntry.atPhysAddress: 1.3.6.1.2.1.3.1.1.2

Adapter Parameters

Name	Default Value	Description
backupSnmpMethod	walk	Backs up the SNMP method (walk, bulk, getnext).
discoverUnknownIPs	true	Discovers IP addresses that are out of the scope range.
moonWalkBulkSize	100	The moon walk bulk size.
moonWalkSleep	100	The moon walk sleep time (in milliseconds).
snmpBulkSize	50	The size of the bulk in a bulk mode.
snmpMethod	bulk	The SNMP method (walk, bulk, getnext).