Manual topology mapping

This is basically what you need for the configsource for CDP, but I can see why they didn’t do it. The problem is IP address reusage. This toposource outputs the mac address of the queried device as the “from” node and outputs the IP addresses of its neighbors as the “to” nodes. The problem is that the IP address needs to be an ERI on the neighbor in LM. So, an ERI source would have to go along with this to make the IP addresses into ERIs on the device. At that point you run the risk of ERI collision/merging issues if IP addresses are reused somewhere else in the network. I suppose topo.namespace would be the way to mitigate this. Basically each customer (for MSPs) would have to have a namespace, then each IP network would have to have a sub-namespace (combination of the customer namespace and the network’s namespace). 

import com.santaba.agent.groovyapi.snmp.Snmp
import groovy.json.*

Oid = "1.3.6.1.4.1.9.9.23.1.2.1.1"
wildvalueTerms = 2
def host = hostProps.get('system.hostname')
def props = hostProps.toProperties()
int timeout = 10000 // 10 sec timeout.
def eris = hostProps.get('predef.externalResourceID')
eri = eris.tokenize(",")[0]
eri = eri.split("::")[-1]

def snmpMapToTable(snmpmap, int wildvalueTerms = 1) {
    rows = [:]
    snmpmap.each {k,v ->
        splits = k.tokenize(".")
        col = splits.dropRight(wildvalueTerms).join(".")
        wildvalue = splits.takeRight(wildvalueTerms).join(".")
        if (!(rows.containsKey(wildvalue))) { rows[wildvalue] = [:] }
        rows[wildvalue][col] = v
    }
    return rows
}

try {walkResult = Snmp.walkAsMap(host, Oid, props, timeout)}
catch (Exception e) {println(e);return 1}

try {entryRaw = snmpMapToTable(walkResult, wildvalueTerms)}
catch (Exception e) {println(e);return 2}

output = ["edges": entryRaw.collect{k,v-> ["type": "Network", "from": eri, "to": v["4"].tokenize(":").collect{address -> Integer.parseInt(address, 16)}.join(".")]}]
println(new JsonBuilder(output).toPrettyString())

return 0

@Michael Rodrigues , is there a groovier way of grabbing just one ERI without the namespace prepended? Would have tagged the PM over topology, but I have no idea who that is.

@A11ey , it might be helpful for the community to know which PM is over which parts of the product so they can tag the right PM when asking particular posts that need PM attention.