diff --git a/cardano-node/src/Cardano/Node/Configuration/POM.hs b/cardano-node/src/Cardano/Node/Configuration/POM.hs
index 1028f03c9ab..35a5e6ef37a 100644
--- a/cardano-node/src/Cardano/Node/Configuration/POM.hs
+++ b/cardano-node/src/Cardano/Node/Configuration/POM.hs
@@ -145,6 +145,7 @@ instance FromJSON PartialNodeConfiguration where
           CardanoProtocol ->
             Last . Just  <$> (NodeProtocolConfigurationCardano <$> parseByronProtocol v
                                                                <*> parseShelleyProtocol v
+                                                               <*> parseAlonzoProtocol v
                                                                <*> parseHardForkProtocol v)
       pure PartialNodeConfiguration {
              pncProtocolConfig = pncProtocolConfig'
@@ -220,6 +221,24 @@ instance FromJSON PartialNodeConfiguration where
              , npcShelleyGenesisFileHash
              }
 
+      parseAlonzoProtocol v = do
+        primary   <- v .:? "AlonzoGenesisFile"
+        secondary <- v .:? "GenesisFile"
+        npcAlonzoGenesisFile <-
+          case (primary, secondary) of
+            (Just g, Nothing)  -> return g
+            (Nothing, Just g)  -> return g
+            (Nothing, Nothing) -> fail $ "Missing required field, either "
+                                      ++ "AlonzoGenesisFile or GenesisFile"
+            (Just _, Just _)   -> fail $ "Specify either AlonzoGenesisFile"
+                                      ++ "or GenesisFile, but not both"
+        npcAlonzoGenesisFileHash <- v .:? "AlonzoGenesisHash"
+
+        pure NodeAlonzoProtocolConfiguration {
+               npcAlonzoGenesisFile
+             , npcAlonzoGenesisFileHash
+             }
+
       parseHardForkProtocol v = do
         npcTestShelleyHardForkAtEpoch   <- v .:? "TestShelleyHardForkAtEpoch"
         npcTestShelleyHardForkAtVersion <- v .:? "TestShelleyHardForkAtVersion"
diff --git a/cardano-node/src/Cardano/Node/Protocol.hs b/cardano-node/src/Cardano/Node/Protocol.hs
index f5454c9627b..8600be86c31 100644
--- a/cardano-node/src/Cardano/Node/Protocol.hs
+++ b/cardano-node/src/Cardano/Node/Protocol.hs
@@ -39,11 +39,13 @@ mkConsensusProtocol NodeConfiguration{ncProtocolConfig, ncProtocolFiles} =
 
       NodeProtocolConfigurationCardano byronConfig
                                        shelleyConfig
+                                       alonzoConfig
                                        hardForkConfig ->
         firstExceptT CardanoProtocolInstantiationError $
           mkSomeConsensusProtocolCardano
             byronConfig
             shelleyConfig
+            alonzoConfig
             hardForkConfig
             (Just ncProtocolFiles)
 
diff --git a/cardano-node/src/Cardano/Node/Protocol/Cardano.hs b/cardano-node/src/Cardano/Node/Protocol/Cardano.hs
index 66dc44f2a44..5fd300bcdb9 100644
--- a/cardano-node/src/Cardano/Node/Protocol/Cardano.hs
+++ b/cardano-node/src/Cardano/Node/Protocol/Cardano.hs
@@ -60,6 +60,7 @@ import           Cardano.Node.Protocol.Types
 mkSomeConsensusProtocolCardano
   :: NodeByronProtocolConfiguration
   -> NodeShelleyProtocolConfiguration
+  -> NodeAlonzoProtocolConfiguration
   -> NodeHardForkProtocolConfiguration
   -> Maybe ProtocolFilepaths
   -> ExceptT CardanoProtocolInstantiationError IO SomeConsensusProtocol
@@ -78,6 +79,7 @@ mkSomeConsensusProtocolCardano NodeByronProtocolConfiguration {
                              npcShelleyGenesisFile,
                              npcShelleyGenesisFileHash
                            }
+                           _AlonzoProtocolConfig
                            NodeHardForkProtocolConfiguration {
                              npcTestShelleyHardForkAtEpoch,
                              npcTestShelleyHardForkAtVersion,
diff --git a/cardano-node/src/Cardano/Node/Types.hs b/cardano-node/src/Cardano/Node/Types.hs
index e2d3d52fd46..b9d7ecd3b06 100644
--- a/cardano-node/src/Cardano/Node/Types.hs
+++ b/cardano-node/src/Cardano/Node/Types.hs
@@ -43,6 +43,7 @@ module Cardano.Node.Types
   , NodeHardForkProtocolConfiguration(..)
   , NodeProtocolConfiguration(..)
   , NodeShelleyProtocolConfiguration(..)
+  , NodeAlonzoProtocolConfiguration(..)
   , VRFPrivateKeyFilePermissionError(..)
   , protocolName
   , renderVRFPrivateKeyFilePermissionError
@@ -261,9 +262,17 @@ data NodeProtocolConfiguration =
      | NodeProtocolConfigurationShelley NodeShelleyProtocolConfiguration
      | NodeProtocolConfigurationCardano NodeByronProtocolConfiguration
                                         NodeShelleyProtocolConfiguration
+                                        NodeAlonzoProtocolConfiguration
                                         NodeHardForkProtocolConfiguration
   deriving (Eq, Show)
 
+data NodeAlonzoProtocolConfiguration =
+       NodeAlonzoProtocolConfiguration
+         { npcAlonzoGenesisFile     :: !GenesisFile
+         , npcAlonzoGenesisFileHash :: !(Maybe GenesisHash)
+         } deriving (Eq, Show)
+
+
 data NodeShelleyProtocolConfiguration =
      NodeShelleyProtocolConfiguration {
        npcShelleyGenesisFile     :: !GenesisFile
@@ -348,17 +357,24 @@ data NodeHardForkProtocolConfiguration =
      , npcTestMaryHardForkAtEpoch :: Maybe EpochNo
 
        -- | For testing purposes we support specifying that the hard fork
-       -- happens at an exact epoch number (ie the first epoch of the new era).
+       -- happens at a given major protocol version.
        --
        -- Obviously if this is used, all the nodes in the test cluster must be
        -- configured the same, or they will disagree.
        --
+       --
      , npcTestMaryHardForkAtVersion :: Maybe Word
 
+       -- | For testing purposes we support specifying that the hard fork
+       -- happens at an exact epoch number (ie the first epoch of the new era).
+       --
+       -- Obviously if this is used, all the nodes in the test cluster must be
+       -- configured the same, or they will disagree.
+       --
      , npcTestAlonzoHardForkAtEpoch :: Maybe EpochNo
 
        -- | For testing purposes we support specifying that the hard fork
-       -- happens at an exact epoch number (ie the first epoch of the new era).
+       -- happens at a given major protocol version.
        --
        -- Obviously if this is used, all the nodes in the test cluster must be
        -- configured the same, or they will disagree.
@@ -384,9 +400,10 @@ instance AdjustFilePaths NodeProtocolConfiguration where
   adjustFilePaths f (NodeProtocolConfigurationShelley pc) =
     NodeProtocolConfigurationShelley (adjustFilePaths f pc)
 
-  adjustFilePaths f (NodeProtocolConfigurationCardano pcb pcs pch) =
+  adjustFilePaths f (NodeProtocolConfigurationCardano pcb pcs pca pch) =
     NodeProtocolConfigurationCardano (adjustFilePaths f pcb)
                                      (adjustFilePaths f pcs)
+                                     (adjustFilePaths f pca)
                                      pch
 
 instance AdjustFilePaths NodeByronProtocolConfiguration where
@@ -401,6 +418,14 @@ instance AdjustFilePaths NodeShelleyProtocolConfiguration where
                       } =
     x { npcShelleyGenesisFile = adjustFilePaths f npcShelleyGenesisFile }
 
+
+instance AdjustFilePaths NodeAlonzoProtocolConfiguration where
+  adjustFilePaths f x@NodeAlonzoProtocolConfiguration {
+                        npcAlonzoGenesisFile
+                      } =
+    x { npcAlonzoGenesisFile = adjustFilePaths f npcAlonzoGenesisFile }
+
+
 instance AdjustFilePaths SocketPath where
   adjustFilePaths f (SocketPath p) = SocketPath (f p)