OK got a couple updates:
First, putting the cable modem in bridge mode bricked everything somehow. It killed it's wifi as it said it would in the manual, but I also couldn't get it to pass through to the ERX (or if it was I couldn't see it).
Second, for the moment I have the cable running between upsatirs and downstairs connected to the upstairs ERX eth1 and directly to the ASUS wireless router's internet in jack on the main floor. When I do this and set it up to be on the 192.168.10.0/24 subnet it successfully pulls an IP from the ERX but no internet (tested it while both in bridge mode and without it). Here is my config so far, I tried setting it up as you suggested all manually...I must have missed something crucial:
firewall {
all-ping enable
broadcast-ping disable
ipv6-receive-redirects disable
ipv6-src-route disable
ip-src-route disable
log-martians enable
name WAN_IN {
default-action drop
description "WAN to internal"
rule 10 {
action accept
description "Allow established/related"
state {
established enable
related enable
}
}
rule 20 {
action drop
description "Drop invalid state"
state {
invalid enable
}
}
}
name WAN_LOCAL {
default-action drop
description "WAN to router"
rule 10 {
action accept
description "Allow established/related"
state {
established enable
related enable
}
}
rule 20 {
action drop
description "Drop invalid state"
state {
invalid enable
}
}
}
receive-redirects disable
send-redirects enable
source-validation disable
syn-cookies enable
}
interfaces {
ethernet eth0 {
address dhcp
description Internet
duplex auto
firewall {
in {
name WAN_IN
}
local {
name WAN_LOCAL
}
}
speed auto
}
ethernet eth1 {
description Local
duplex auto
speed auto
}
ethernet eth2 {
description Local
duplex auto
speed auto
}
ethernet eth3 {
description Local
duplex auto
speed auto
}
ethernet eth4 {
description Local
duplex auto
speed auto
}
loopback lo {
}
switch switch0 {
address 192.168.1.1/24
address 192.168.10.1/24
address 192.168.20.1/24
description Local
dhcp-options {
default-route update
default-route-distance 210
name-server update
}
mtu 1500
switch-port {
interface eth1 {
vlan {
vid 10
vid 20
}
}
interface eth2 {
vlan {
pvid 10
}
}
interface eth3 {
vlan {
vid 10
vid 20
}
}
interface eth4 {
}
vlan-aware enable
}
}
}
service {
dhcp-server {
disabled false
hostfile-update disable
shared-network-name LAN {
authoritative enable
subnet 192.168.1.0/24 {
default-router 192.168.1.1
dns-server 192.168.1.1
lease 86400
start 192.168.1.38 {
stop 192.168.1.243
}
}
}
use-dnsmasq disable
}
dns {
forwarding {
cache-size 150
listen-on switch0
}
}
gui {
http-port 80
https-port 443
older-ciphers enable
}
nat {
rule 5010 {
description "masquerade for WAN"
outbound-interface eth0
type masquerade
}
}
ssh {
port 22
protocol-version v2
}
}
system {
host-name ubnt
login {
user ubnt {
authentication {
encrypted-password ******
}
level admin
}
}
ntp {
server 0.ubnt.pool.ntp.org {
}
server 1.ubnt.pool.ntp.org {
}
server 2.ubnt.pool.ntp.org {
}
server 3.ubnt.pool.ntp.org {
}
}
syslog {
global {
facility all {
level notice
}
facility protocols {
level debug
}
}
}
time-zone UTC
}
/* Warning: Do not remove the following line. */
/* === vyatta-config-version: "config-management@1:conntrack@1:cron@1:dhcp-relay@1:dhcp-server@4:firewall@5:ipsec@5:nat@3:qos@1:quagga@2:system@4:ubnt-pptp@1:ubnt-util@1:vrrp@1:webgui@1:webproxy@1:zone-policy@1" === */
/* Release version: v1.9.0.4901118.160804.1131 */