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Cisco NX-OS static null routes

Find all static null routes on Cisco NX-OS devices​

This query illustrates that text matching patterns may include components such as ipv4Subnet that match specific types of entities, not just strings.

Using patternMatches​

foreach device in network.devices
where device.platform.vendor == Vendor.CISCO &&
      device.platform.os == OS.NXOS
let staticRoutes =
     (foreach match
        in patternMatches(device.files.config, `ip route {prefix:ipv4Subnet} Null0`)
      select match.data.prefix)
select { device: device.name,
         prefixes: staticRoutes,
         violation: length(staticRoutes) > 0
       }

Using patternMatch​

foreach device in network.devices
where device.platform.vendor == Vendor.CISCO &&
      device.platform.os == OS.NXOS
let staticRoutes =
      (foreach line in device.files.config
       let match = patternMatch(line.text, `ip route {prefix:ipv4Subnet} Null0`)
       where isPresent(match)
       select match.prefix)
select { device: device.name,
         prefixes: staticRoutes,
         violation: length(staticRoutes) > 0
       }