diff --git a/config/config.go b/config/config.go
index 3e1ff2237..07dc01af3 100644
--- a/config/config.go
+++ b/config/config.go
@@ -165,6 +165,7 @@ type configFlags struct {
 	DropAddrIndex        bool          `long:"dropaddrindex" description:"Deletes the address-based transaction index from the database on start up and then exits."`
 	RelayNonStd          bool          `long:"relaynonstd" description:"Relay non-standard transactions regardless of the default settings for the active network."`
 	RejectNonStd         bool          `long:"rejectnonstd" description:"Reject non-standard transactions regardless of the default settings for the active network."`
+	SubNetwork           uint64        `long:"subnetwork" description:"If subnetwork > 0, than node will request and process only payloads from specified subnetwork. And if subnetwork is 0, than payloads of all subnetworks are processed."`
 }
 
 // Config defines the configuration options for btcd.
@@ -750,6 +751,15 @@ func loadConfig() (*Config, []string, error) {
 		cfg.MiningAddrs = append(cfg.MiningAddrs, addr)
 	}
 
+	// Check that 'generate' and 'subnetwork' flags do not conflict
+	if cfg.Generate && cfg.SubNetwork != 0 {
+		str := "%s: both generate flag and subnetwork filtering are set "
+		err := fmt.Errorf(str, funcName)
+		fmt.Fprintln(os.Stderr, err)
+		fmt.Fprintln(os.Stderr, usageMessage)
+		return nil, nil, err
+	}
+
 	// Ensure there is at least one mining address when the generate flag is
 	// set.
 	if cfg.Generate && len(cfg.MiningAddrs) == 0 {
diff --git a/sample-btcd.conf b/sample-btcd.conf
index 0a6ddab7e..622055eac 100644
--- a/sample-btcd.conf
+++ b/sample-btcd.conf
@@ -343,3 +343,12 @@
 ; be disabled if this option is not specified.  The profile information can be
 ; accessed at http://localhost:<profileport>/debug/pprof once running.
 ; profile=6061
+
+; ------------------------------------------------------------------------------
+; Subnetworks
+; ------------------------------------------------------------------------------
+
+; If subnetwork > 0, than node will request and process only payloads from
+; specified subnetwork. And if subnetwork is 0, than payloads of all subnetworks
+; are processed. It also requires that generate flag will be false.
+; subnetwork=0
\ No newline at end of file