Discovery Home Subnet Discovery does not run 'Network Routing Device - Light' pattern against the next hop Routers/L3 Switches of the starting routers, and it should.
This leads to failing to discover the next hop routers/L3 switches in the chain.
Steps to Reproduce
- Navigate to Discovery home > Configure the subnet discovery with 1 MID server that its default gateway router/L3 switch has a next hop that should be discovered.
'Network Routing Device - Light' pattern will run only against the starting router and it will not be triggered against the discovered next hops of the starting router 'MID server default gateway'.
'Network Routing Device - Light' pattern should be triggered by Subnet Discovery - On Target Discovery Success - Post Sensor Script against the identified next hops.
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The routers could be added manually to the Subnet Discovery configuration. You can query a list of the dscy_route_next_hop table for the first router, where dest_ip_network is "0.0.0.0/0" to find the routers.
Related Problem: PRB1344543