Difference between revisions of "Linksys AC Series Router Configuration Tips for OpenWRT"
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===Recommended Hardware Devices=== | ===Recommended Hardware Devices=== | ||
The best recommendation for a USB Flash Drive is the SanDisk Ultra Fit USB 3.1 Flash Drive Series. And the recommendation is NOT because it is the fastest. They brag speeds up to 130 MB/S. Maybe downhill in a tornado, but under normal systems, that speed is a joke for this piece of hardware. So why recommend it? Well as it turns out, the fastest drive, USB, eSATA, or otherwise that has been tested on the AC Series is about 70 MB/S (this has been confirmed for eSATA) and around 45 MB/S for USB 3.0 (using a Patriot SuperSonic Rage Elite USB 3.1 Flash Drive that has been verified multiple times at over 200 MB/S sustained). Based on that and the below reviews it seems the Ethernet Switch may be topping out at about 70 MB/S, which is quite respectable.[[File:Sabrent USB 3.0 Hub.jpg|alt=Sabrent USB 3.0 Hub|thumb|158x158px|Sabrent USB 3.0 Hub|left]]Some reviews have the USB 3.0 speeds and eSATA speeds about the same at around 70 MB/S: https://www.eteknix.com/linksys-wrt3200acm-router-review/10/ | The best recommendation for a USB Flash Drive is the SanDisk Ultra Fit USB 3.1 Flash Drive Series. And the recommendation is NOT because it is the fastest. They brag speeds up to 130 MB/S. Maybe downhill in a tornado, but under normal systems, that speed is a joke for this piece of hardware. So why recommend it? Well as it turns out, the fastest drive, USB, eSATA, or otherwise that has been tested on the AC Series is about 70 MB/S (this has been confirmed for eSATA) and around 45 MB/S for USB 3.0 (using a Patriot SuperSonic Rage Elite USB 3.1 Flash Drive that has been verified multiple times at over 200 MB/S sustained). Based on that and the below reviews it seems the Ethernet Switch may be topping out at about 70 MB/S, which is quite respectable.[[File:Sabrent USB 3.0 Hub.jpg|alt=Sabrent USB 3.0 Hub (HB-R3MB)|thumb|158x158px|Sabrent USB 3.0 Hub|left]]Some reviews have the USB 3.0 speeds and eSATA speeds about the same at around 70 MB/S: https://www.eteknix.com/linksys-wrt3200acm-router-review/10/ | ||
Others have the USB 3.0 speeds measured considerably slower at about 20 MB/S: https://www.kitguru.net/peripherals/james-morris/linksys-wrt3200acm-ac3200-wireless-router-review/4/ | Others have the USB 3.0 speeds measured considerably slower at about 20 MB/S: https://www.kitguru.net/peripherals/james-morris/linksys-wrt3200acm-ac3200-wireless-router-review/4/ | ||
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Anyway, the above mentioned SanDisk device tops out at about 70 MB/S on every system that the above mentioned Patriot device tops out at over 200 MB/S. Notice that 70 MB/S speed mentioned twice? Once for the SanDisk device and once for the AC Series. The next item to consider is price. The SanDisk is not the cheapest, but it is fairly low. When price and performance are both considered, it turns out the SanDisk device beats everyone. And since the AC series router and SanDisk USB Flash Drive both top out at around 70 MB/S, that makes it the perfect match. | Anyway, the above mentioned SanDisk device tops out at about 70 MB/S on every system that the above mentioned Patriot device tops out at over 200 MB/S. Notice that 70 MB/S speed mentioned twice? Once for the SanDisk device and once for the AC Series. The next item to consider is price. The SanDisk is not the cheapest, but it is fairly low. When price and performance are both considered, it turns out the SanDisk device beats everyone. And since the AC series router and SanDisk USB Flash Drive both top out at around 70 MB/S, that makes it the perfect match. | ||
If one is considering using the USB Flash Drive for other purposes, go with the Patriot USB Flash Drive. If using the USB flash drive as a dedicated device for an AC series routers then go with the SanDisk USB flash drive. Plus it's also much smaller and has a lower profile than the patriot device. Both drives claim speeds about double what they can deliver. The final joke is that the Patriot device is USB 3.0 and the SanDisk is a USB 3.1 device.[[File:USB 3.0 Extension.jpg|alt=USB 3.0 Extension|thumb|120x120px|USB 3.0 Extension|left]]Another nice item, which isn't necessary, but makes nice neat way to connect several USB flash drives to a router is a Sabrent USB 3.0 Hub (model HB-RBM3). From [https://www.walmart.com/ip/Sabrent-Premium-3-Port-Aluminum-Mini-USB-3-0-90-180-Degree-Rotatable-HB-R3MB/114811464 Wal-Mart], only about $12. There are other similar device, but this one is much higher quality. Sadly, even with its ability to rotate, it won't plug into the router without blocking several of the Ethernet ports (including the WAN port) or the power connector. Thanks to the overhang on the rear of the AC Series router, it can't be rotated up. | If one is considering using the USB Flash Drive for other purposes, go with the Patriot USB Flash Drive. If using the USB flash drive as a dedicated device for an AC series routers then go with the SanDisk USB flash drive. Plus it's also much smaller and has a lower profile than the patriot device. Both drives claim speeds about double what they can deliver. The final joke is that the Patriot device is USB 3.0 and the SanDisk is a USB 3.1 device.[[File:USB 3.0 Extension.jpg|alt=USB 3.0 Extension|thumb|120x120px|USB 3.0 Extension|left]]Another nice item, which isn't necessary, but makes nice neat way to connect several USB flash drives to a router is a Sabrent USB 3.0 Hub (model HB-RBM3). From [https://www.walmart.com/ip/Sabrent-Premium-3-Port-Aluminum-Mini-USB-3-0-90-180-Degree-Rotatable-HB-R3MB/114811464 Wal-Mart], only about $12. There are other similar device, but this one is much higher quality. Sadly, even with its ability to rotate, it won't plug into the router without blocking several of the Ethernet ports (including the WAN port) or the power connector. Thanks to the overhang on the rear of the AC Series router, it can't be rotated up. This is not the fault of the Sabrent USB 3.0 Hub, but the design of the Linksys Router that causes the issue. It is also worth pointing out that in tests, there was ''no'' drop in transfer speeds between a single USB Flash Drive plugged directly into the router's USB 3.0 port and the same drive plugged into the router via the Sabrent USB 3.0 hub. | ||
[[File:USB to mSATA.jpg|alt=USB to mSATA|left|thumb|120x120px|USB to mSATA Enclosure]] | [[File:USB to mSATA.jpg|alt=USB to mSATA|left|thumb|120x120px|USB to mSATA Enclosure]] | ||
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But also keep in mind the settings changes in the /etc/init.d/dhcpd startup script only affect the DHCPD service. The /etc/resolv.conf File still derives its settings from the /etc/config/dhcp File when the DHCPD service is restarted or the router is rebooted (same for DNSMASQ). IE, the /etc/config/dhcp File should not be completely dismissed as useless. | But also keep in mind the settings changes in the /etc/init.d/dhcpd startup script only affect the DHCPD service. The /etc/resolv.conf File still derives its settings from the /etc/config/dhcp File when the DHCPD service is restarted or the router is rebooted (same for DNSMASQ). IE, the /etc/config/dhcp File should not be completely dismissed as useless. | ||
==== Restricting the DHCPD Service to only Answer / Listen on Desired Interfaces ==== | ====Restricting the DHCPD Service to only Answer / Listen on Desired Interfaces==== | ||
To restrict the DHCPD service to a specific interface, edit the /etc/init.d/dhcpd file, scroll way down to the start_service section, and look for the following line; | To restrict the DHCPD service to a specific interface, edit the /etc/init.d/dhcpd file, scroll way down to the start_service section, and look for the following line; | ||
* procd_set_param command $PROG -q -f -cf $config_file -lf $lease_file $dhcp_ifs | *procd_set_param command $PROG -q -f -cf $config_file -lf $lease_file $dhcp_ifs | ||
Change it in similar manner to the below examples; | Change it in similar manner to the below examples; | ||
* procd_set_param command $PROG WhatEverAdapterName WhatEverOtherAdapterName -q -f -cf $config_file -lf $lease_file $dhcp_ifs | * procd_set_param command $PROG WhatEverAdapterName WhatEverOtherAdapterName -q -f -cf $config_file -lf $lease_file $dhcp_ifs | ||
* procd_set_param command $PROG eth0.1 br-LAN1_1 -q -f -cf $config_file -lf $lease_file $dhcp_ifs | * procd_set_param command $PROG eth0.1 br-LAN1_1 -q -f -cf $config_file -lf $lease_file $dhcp_ifs | ||
Many sites suggest that creating a blank / empty zone for the subnet (on a multi-homed device) will make it so DHCPD doesn't answer for those interfaces. But testing has prooven otherwise. The below settings in /etc/dhcpd/dhcpd.conf will '''''00000000000000000000000000''''' prevent the DHCPD service from answering on the interface associated with the W.X.Y.Z IP Address;<syntaxhighlight lang="text"> | Many sites suggest that creating a blank / empty zone for the subnet (on a multi-homed device) will make it so DHCPD doesn't answer for those interfaces. But testing has prooven otherwise. The below settings in /etc/dhcpd/dhcpd.conf will '''''00000000000000000000000000''''' prevent the DHCPD service from answering on the interface associated with the W.X.Y.Z IP Address;<syntaxhighlight lang="text"> | ||