I had the same problem with my 87, LAG LAG LAG (after 4 Hours or a day or so) so...........
With Asus or merlin firmware change these settings in Asus or Merlins
-turn off or disable any Guest networks
-Turn off any USB or media service
Now for the settings that work best for PS4
- in the "LAN" section.
--IPTV Tab--
-"Use DHCP routes" select "RFC3442 & Microsoft"
-ENABLE "Enable multicast routing (IGMP Proxy)"
-ENABLE "Enable efficient multicast forwarding (IGMP Snooping)"
--Switch Control Tab--
-Enable Jumbo Frame select "Enable"
-NAT Acceleration select "Disable" (you can experiment on this, you may have to enable)
-Spanning-Tree Protocol select "Disable" (you can experiment on this, you may have to enable)
- In the "WAN" section.
--Internet Connection Tab--
-Enable NAT to "Yes"
-Enable UPnP to "Yes"
-UPNP: Allowed internal port range to "1" to "65535"
-UPNP: Allowed external port range to "1" to "65535"
--NAT Passthrough Tab--
-"Enable" every option
- In the "Firewall" section.
--General Tab--
-NAT Loopback to "Asus" (if using Merlins firmware)
Now the biggest change is finding your perfect DNS servers and add them to your PS4 network settings, so do a google in Russia for :Best PS4 DNS servers"
post back with results, you may want to schedule a daily reboot of the router, in your case as nothing will work for over 1-2 days on the Asus 87
Here is merlins firmware start with the latest Beta so go to the rt-ac87 folder then go to Beta folder and download the latest one.
OR go to the
asus site and download the latest that is Beta Version9.0.0.4.380.2695