diff --git a/README.md b/README.md
index 43fb365..75bdf97 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ Custom configurations should be supplied in a `lixonet.conf` file in the `name=v
 
 #### Prerequisites/Setup:
 
-WARNING: On some systems (i.e. Raspberry Pi) with integrated Ethernet, it seems promiscuous (PROMISC) mode is required on your `eth0` (see #1 next).
+WARNING: On some systems (i.e. Raspberry Pi) with integrated Ethernet, it seems promiscuous (PROMISC) mode is required on your `eth0` (see #1 next).  Otherwise you won't see traffic getting passed to the tinc, wireguard, etc. containers from devices in your network.
 
 1. `eth0` is the **LAN** or **WAN** interface supporting external routing, DNS, etc., and is the **bridged** interface to a router that will statically route the entire desired network subnet (i.e. x.x.0.0/21) through it.  You may also have an `eth1` (and so on, so forth) that you statically configure for your entire, wide subnet (i.e. x.x.0.0/21) if you want to use two physical adapters.  If you do have more than one interface, make sure that `internal_gateway` is set to the router IP address that can route your personal Lixonet subnets, and not your WAN gateway (unless they're the same).
 2. `tun` and `tap` are in `/etc/modules` to load at boot (https://www.cyberciti.biz/faq/linux-how-to-load-a-kernel-module-automatically-at-boot-time/) and the system has been rebooted afterwards.