diff --git a/ouroboros-consensus/ouroboros-consensus-test-infra/src/Test/ThreadNet/Network.hs b/ouroboros-consensus/ouroboros-consensus-test-infra/src/Test/ThreadNet/Network.hs
index c5f2f7f2b58..350f132e80c 100644
--- a/ouroboros-consensus/ouroboros-consensus-test-infra/src/Test/ThreadNet/Network.hs
+++ b/ouroboros-consensus/ouroboros-consensus-test-infra/src/Test/ThreadNet/Network.hs
@@ -56,6 +56,7 @@ import           Data.Void (Void)
 import           GHC.Stack
 
 import qualified Ouroboros.Network.AnchoredFragment as AF
+import           Ouroboros.Network.BlockFetch (BlockFetchConfiguration (..))
 import           Ouroboros.Network.Channel
 import           Ouroboros.Network.Codec (AnyMessage (..), CodecFailure,
                      mapFailureCodec)
@@ -903,6 +904,11 @@ runThreadNetwork systemTime ThreadNetworkArgs
                   blockFetchPipeliningMax     = 10,
                   txSubmissionMaxUnacked      = 1000 -- TODO ?
                 }
+            , blockFetchConfiguration = BlockFetchConfiguration {
+                  bfcMaxConcurrencyBulkSync = 1
+                , bfcMaxConcurrencyDeadline = 2
+                , bfcMaxRequestsInflight    = 10
+                }
             }
 
       nodeKernel <- initNodeKernel nodeArgs
diff --git a/ouroboros-consensus/src/Ouroboros/Consensus/Node.hs b/ouroboros-consensus/src/Ouroboros/Consensus/Node.hs
index d1393757c09..3038c18bee1 100644
--- a/ouroboros-consensus/src/Ouroboros/Consensus/Node.hs
+++ b/ouroboros-consensus/src/Ouroboros/Consensus/Node.hs
@@ -31,6 +31,7 @@ module Ouroboros.Consensus.Node
   , openChainDB
   , mkChainDbArgs
   , mkNodeArgs
+  , nodeArgsEnforceInvariants
   ) where
 
 import           Codec.Serialise (DeserialiseFailure)
@@ -41,6 +42,7 @@ import           Data.Map.Strict (Map)
 import qualified Data.Map.Strict as Map
 import           System.Random (randomRIO)
 
+import           Ouroboros.Network.BlockFetch (BlockFetchConfiguration (..))
 import           Ouroboros.Network.Diffusion
 import           Ouroboros.Network.Magic
 import           Ouroboros.Network.NodeToClient (DictVersion (..),
@@ -205,7 +207,7 @@ run runargs@RunNodeArgs{..} =
                       (pure $ BackoffDelay 60) -- see 'BackoffDelay'
                       (ledgerState <$>
                          ChainDB.getCurrentLedger chainDB)
-      nodeArgs   <- rnCustomiseNodeArgs <$>
+      nodeArgs   <- nodeArgsEnforceInvariants . rnCustomiseNodeArgs <$>
                       mkNodeArgs
                         registry
                         cfg
@@ -442,4 +444,35 @@ mkNodeArgs registry cfg mIsLeader tracers btime chainDB = do
       , maxTxCapacityOverride   = NoMaxTxCapacityOverride
       , mempoolCapacityOverride = NoMempoolCapacityBytesOverride
       , miniProtocolParameters  = defaultMiniProtocolParameters
+      , blockFetchConfiguration = defaultBlockFetchConfiguration
       }
+  where
+    defaultBlockFetchConfiguration :: BlockFetchConfiguration
+    defaultBlockFetchConfiguration = BlockFetchConfiguration
+      { bfcMaxConcurrencyBulkSync = 1
+      , bfcMaxConcurrencyDeadline = 2
+      , bfcMaxRequestsInflight    = blockFetchPipeliningMax defaultMiniProtocolParameters
+      }
+
+-- | We allow the user running the node to customise the 'NodeArgs' through
+-- 'rnCustomiseNodeArgs', but there are some limits to some values. This
+-- function makes sure we don't exceed those limits and that the values are
+-- consistent.
+nodeArgsEnforceInvariants
+  :: NodeArgs m RemoteConnectionId LocalConnectionId blk
+  -> NodeArgs m RemoteConnectionId LocalConnectionId blk
+nodeArgsEnforceInvariants nodeArgs@NodeArgs{..} = nodeArgs
+    { miniProtocolParameters = miniProtocolParameters
+        -- If 'blockFetchPipeliningMax' exceeds the configured default, it
+        -- would be a protocol violation.
+        { blockFetchPipeliningMax =
+            min (blockFetchPipeliningMax miniProtocolParameters)
+                (blockFetchPipeliningMax defaultMiniProtocolParameters)
+        }
+    , blockFetchConfiguration = blockFetchConfiguration
+        -- 'bfcMaxRequestsInflight' must be <= 'blockFetchPipeliningMax'
+        { bfcMaxRequestsInflight =
+            min (bfcMaxRequestsInflight blockFetchConfiguration)
+                (blockFetchPipeliningMax miniProtocolParameters)
+        }
+    }
diff --git a/ouroboros-consensus/src/Ouroboros/Consensus/NodeKernel.hs b/ouroboros-consensus/src/Ouroboros/Consensus/NodeKernel.hs
index 02a82c68222..154438de7f8 100644
--- a/ouroboros-consensus/src/Ouroboros/Consensus/NodeKernel.hs
+++ b/ouroboros-consensus/src/Ouroboros/Consensus/NodeKernel.hs
@@ -129,6 +129,7 @@ data NodeArgs m remotePeer localPeer blk = NodeArgs {
     , maxTxCapacityOverride   :: MaxTxCapacityOverride
     , mempoolCapacityOverride :: MempoolCapacityBytesOverride
     , miniProtocolParameters  :: MiniProtocolParameters
+    , blockFetchConfiguration :: BlockFetchConfiguration
     }
 
 initNodeKernel
@@ -142,7 +143,7 @@ initNodeKernel
     -> m (NodeKernel m remotePeer localPeer blk)
 initNodeKernel args@NodeArgs { registry, cfg, tracers, maxTxCapacityOverride
                              , blockProduction, chainDB, initChainDB
-                             , miniProtocolParameters } = do
+                             , blockFetchConfiguration } = do
 
     initChainDB cfg (InitChainDB.fromFull chainDB)
 
@@ -173,14 +174,6 @@ initNodeKernel args@NodeArgs { registry, cfg, tracers, maxTxCapacityOverride
       , getTracers             = tracers
       }
 
-  where
-    blockFetchConfiguration :: BlockFetchConfiguration
-    blockFetchConfiguration = BlockFetchConfiguration
-      { bfcMaxConcurrencyBulkSync = 1 -- Set to 1 for now, see #1526
-      , bfcMaxConcurrencyDeadline = 1
-      , bfcMaxRequestsInflight    = blockFetchPipeliningMax miniProtocolParameters
-      }
-
 {-------------------------------------------------------------------------------
   Internal node components
 -------------------------------------------------------------------------------}