diff --git a/protocol-3.md b/protocol-3.md
index 0dc5b63..2f674c5 100644
--- a/protocol-3.md
+++ b/protocol-3.md
@@ -36,19 +36,6 @@ When sending a message, check the cache for the given destination. If there is a
 ### Optional: Broadcast address
 Packets addressed to the broadcast address, an address beginning with the tilde character, `~`, ASCII 126, can optionally be received by all nodes of the same layer 2 network. While a node MAY forward a broadcast packet to other nodes, it SHOULD NOT, unless both sides of the forward are prepared to handle such a packet, to avoid it going around the entire layer 3 network.
 
-### Optional: Multicast
-A multicast packet has a specially formatted address part.  
-The address must be a list of valid addresses, beginning with `~` seperated by the tilde character, `~`, ASCII 126.  
-For example, to send to nodes `a` and `b`, the address in the packet would be `~a~b`.
-
-Each node should send multicasts as layer 2 broadcasts, unless it is known (using the address cache) that all layer 3 destination addresses have to be sent to or forwarded by one layer 2 address.
-
-When a multicast packet is forwarded, the addresses already seen SHOULD be removed from the packet when possible, using the address cache as a guide.
-
-The same address MUST NOT be repeated in a multicast destination, but the duplicate MAY be ignored and just considered one, but also MAY br dropped as an invalid packet. A duplicate address MUST NOT be considered as two packets with the same contents to the same address.
-
-A multicast packet SHOULD also be able to be broken up into multiple packets with the same contents (but they need different packet IDs!) with different addresses.
-
 ### WIP, Optional: Network status packets
 
 Currently undecided on specifics and taking input.
diff --git a/protocol-ext-multicast.md b/protocol-ext-multicast.md
new file mode 100644
index 0000000..e042c5c
--- /dev/null
+++ b/protocol-ext-multicast.md
@@ -0,0 +1,13 @@
+### Optional: Multicast
+A multicast packet has a specially formatted address part.  
+The address must be a list of valid addresses, beginning with `~` seperated by the tilde character, `~`, ASCII 126.  
+For example, to send to nodes `a` and `b`, the address in the packet would be `~a~b`.
+
+Each node should send multicasts as layer 2 broadcasts, unless it is known (using the address cache) that all layer 3 destination addresses have to be sent to or forwarded by one layer 2 address.
+
+When a multicast packet is forwarded, the addresses already seen SHOULD be removed from the packet when possible, using the address cache as a guide.
+
+The same address MUST NOT be repeated in a multicast destination, but the duplicate MAY be ignored and just considered one, but also MAY br dropped as an invalid packet. A duplicate address MUST NOT be considered as two packets with the same contents to the same address.
+
+A multicast packet SHOULD also be able to be broken up into multiple packets with the same contents (but they need different packet IDs!) with different addresses.
+