Add Besu note (#1574)

* add besu note

* Update link

Signed-off-by: Joan E <153745173+joaniefromtheblock@users.noreply.github.com>

* Update docs/public-networks/get-started/connect/sync-node.md

Co-authored-by: Alexandra Tran Carrillo <12214231+alexandratran@users.noreply.github.com>
Signed-off-by: Joan E <153745173+joaniefromtheblock@users.noreply.github.com>

* Update docs/public-networks/reference/cli/options.md

Co-authored-by: Alexandra Tran Carrillo <12214231+alexandratran@users.noreply.github.com>
Signed-off-by: Joan E <153745173+joaniefromtheblock@users.noreply.github.com>

---------

Signed-off-by: Joan E <153745173+joaniefromtheblock@users.noreply.github.com>
Co-authored-by: Alexandra Tran Carrillo <12214231+alexandratran@users.noreply.github.com>

docs/private-networks/get-started/start-node.md

@@ -104,3 +104,11 @@ Where `<data-path>` is the path to the directory to save the chain data to. Ensu
 You might need to set [`--tx-pool-limit-by-account-percentage`](../../public-networks/reference/cli/options.md#tx-pool-limit-by-account-percentage) to 1. The default value is suitable for Mainnet, but may cause issues on private networks.
 
 :::
+
+:::note Sync nodes for BFT
+
+If you're running a node on a [QBFT](../how-to/configure/consensus/qbft.md) or [IBFT 2.0](../how-to/configure/consensus/ibft.md) network, your node must use [fast sync](../../public-networks/get-started/connect/sync-node#fast-synchronization) or [full sync](../../public-networks/get-started/connect/sync-node#run-an-archive-node). 
+
+Full sync is set by default.
+
+:::

docs/public-networks/get-started/connect/sync-node.md

@@ -47,6 +47,12 @@ You can store the world state using [Forest of Tries](../../concepts/data-storag
 
 You can run a full node using [snap synchronization (snap sync)](#snap-synchronization), [checkpoint synchronization (checkpoint sync)](#checkpoint-synchronization), or [fast synchronization (fast sync)](#fast-synchronization).
 
+:::note Sync nodes for BFT
+
+Snap sync and checkpoint sync are not supported for [QBFT](../../../private-networks/how-to/configure/consensus/qbft.md) or [IBFT 2.0](../../../private-networks/how-to/configure/consensus/ibft.md) networks. 
+
+:::
+
 ### Snap synchronization
 
 :::tip

docs/public-networks/reference/cli/options.md

@@ -4784,6 +4784,12 @@ The synchronization mode. Use `SNAP` for [snap sync](../../get-started/connect/s
 - The default is `FULL` when connecting to a private network by not using the [`--network`](#network) option and specifying the [`--genesis-file`](#genesis-file) option.
 - The default is `SNAP` when using the [`--network`](#network) option with named networks, except for the `dev` development network. `SNAP` is also the default if running Besu on the default network (Ethereum Mainnet) by specifying neither [network](#network) nor [genesis file](#genesis-file).
 
+:::note Sync nodes for BFT
+
+If you're running a node on a [QBFT](../../../private-networks/how-to/configure/consensus/qbft.md) or [IBFT 2.0](../../../private-networks/how-to/configure/consensus/ibft.md) network, your node must use fast sync or full sync.
+
+:::
+
 :::tip
 
 - We recommend using snap sync over fast sync because snap sync can be faster by several days.