diff --git a/scripts/local_testnet/ganache_test_node.sh b/scripts/local_testnet/ganache_test_node.sh
index c6bf47031a..43a0e0e5dc 100755
--- a/scripts/local_testnet/ganache_test_node.sh
+++ b/scripts/local_testnet/ganache_test_node.sh
@@ -9,5 +9,5 @@ ganache-cli \
 	--mnemonic "$ETH1_NETWORK_MNEMONIC" \
 	--port 8545 \
 	--blockTime 3 \
-	--networkId 4242 \
-	--chainId 4242
+	--networkId "$NETWORK_ID" \
+	--chainId "$NETWORK_ID"
diff --git a/scripts/local_testnet/setup.sh b/scripts/local_testnet/setup.sh
index 42fe217ac8..ad0e053752 100755
--- a/scripts/local_testnet/setup.sh
+++ b/scripts/local_testnet/setup.sh
@@ -30,7 +30,7 @@ lcli \
 	--min-genesis-time $GENESIS_TIME \
 	--genesis-delay $GENESIS_DELAY \
 	--genesis-fork-version $GENESIS_FORK_VERSION \
-	--eth1-id $BOOTNODE_PORT \
+	--eth1-id $NETWORK_ID \
 	--eth1-follow-distance 1 \
 	--seconds-per-eth1-block 1 \
 	--force
@@ -54,4 +54,4 @@ lcli \
 	--testnet-dir $TESTNET_DIR \
 	$GENESIS_VALIDATOR_COUNT
 
-echo Created genesis state in $TESTNET_DIR
\ No newline at end of file
+echo Created genesis state in $TESTNET_DIR
diff --git a/scripts/local_testnet/vars.env b/scripts/local_testnet/vars.env
index 7320210533..356ddc9d98 100644
--- a/scripts/local_testnet/vars.env
+++ b/scripts/local_testnet/vars.env
@@ -19,4 +19,9 @@ GENESIS_VALIDATOR_COUNT=80
 NODE_COUNT=4
 
 GENESIS_DELAY=180
+
+# Port for P2P communication with bootnode
 BOOTNODE_PORT=4242
+
+# Network ID and Chain ID of local eth1 test network
+NETWORK_ID=4242