MicroCell TroubleShooting Questions and TP-Link TL-ER6120 Dual WAN VPN Router not compatible?
OttoPylot, an Ace Master troubleshooter (and not an ATT employee) has kindly put together a list of things to check when your MicroCell does not / will not work.
This is copied from a somewhat extensive troubleshooting session that I dived into the end of and thought it would be easier to start a brand new post with his list and then my answers. (Otherwise, if you are looking for answers like this, it would be at the bottom of a long discussion)
As with all electronics, there are quirkiness issues that can create immense frustration, so take a deep breath and be thankful there are people like OttoPylot and Avedis53 who are willing to take their time to try and help troubleshoot these things.
Here is the question list (put together from their experiences with helping out others)
Edited by OttoPylot on Sep 25, 2014 at 6:26:46 PM
MicroCell TroubleShooting Questions:
- Do you have an active postpaid AT&T mobile account?
- Do you have a combined modem/router or a separate modem and router?
- What are the model numbers?
- Have you met the minimum requirements for router configuration as outlined in the Tech Guide?
- What are your download and upload speeds?
- What kind of internet service do you have (ADSL, cable, WiFi)?
- Are you using the basic connection (modem -> router -> MicroCell) or the alternate connection (modem -> MicroCell -> router)?
- What other equipment (computers, WiFi TV’s, Xboxes, Playstations, etc.) do you have connected to your network?
- What does the light pattern look like on the MicroCell (power, ethernet, GPS, and 3G)? Are they all a solid green or is any of them blinking green or red, and if so, which one?
- Does the ac adapter feel warmer than the top of the MicroCell where the vents are?
- Are all of the cables firmly in place?
- Have you checked your line speed (http://www.speedtest.net/)? If so, please post results.
- Have you checked to see if you line is adequate for VoIP (http://www.voipqualitytest.com/)? If so, please post your results.
- Have you checked the Tech Guide?
And here are my answers, and although I'm no guru, my gut is telling me this TP-Link TL-ER6120 is likely over-managing the DMZ zone and can't be easily made to work with a MicroCell.
I'm looking at other dual WAN routers such as a Peplink Balance 20 Dual-WAN in hopes it may work.
Do you have an active postpaid AT&T mobile account?
Yes, 3 in the house, plus friends who stay over have had on / off access via MicroCell
Do you have a combined modem/router or a separate modem and router?
DSL Modem and separate firewall/router.
I've tried Internet->DSL Modem->Router->MicroCell, and it currently is either flaky or does not work.
Direct? (DSL modem -> MicroCell) connects every time, super fast, in typically under 10 minutes. Everything works on the MicroCell when placed in direct mode. Trouble is, all my LAN wiring (10+ cables) are at the far end of the house and since it's brick, I need the MicroCell in the middle of the house so everyone gets great reception. I did try the MicroCell centrally in the attic, it could not get a GPS lock, even after 48 hours of trying.
What are the model numbers?
DSL Modem, Siemens SpeedStream 4100
Old firewall/router: Linksys BEFSX41 Firmware Version: 1.52.15 Deactivated because it is flakey. Keeps locking up on the rest of the SOHO LAN and was flakey but occasionally worked with MicroCell when I placed the MicroCell in a static IP mode and put that static IP into the DMZ.
New firewall/router: TP-Link TL-ER6120 Dual Wan Router SafeStream latest version, 1.6 just purchased in the last week to resolve flakey Linksys Firewall/Router
Have you met the minimum requirements for router configuration as outlined in the Tech Guide?
-DHCP is on (also tried both limiting IPs to one and reserved / static IP in DMZ)
-Port Blocking is either turned off or allowing ports 4500 and 500 (Tried forwarding and tried putting separate limited or static IP into DMZ)
-MTU size is set to 1492
-MAC address filtering is either turned off or allowing the MAC address of the AT&T 3G MicroCell (With the MicroCell in the DMZ, MAC filtering is normally not an option)
-IPSec Pass-Through is Enabled (With the MicroCell in the DMZ, IPSec Pass-Through should be on, but who knows in these more complicated routers)
-Block Fragmented Packets is Disabled (Cannot uncheck this option in the TL-ER6120, it is grayed out, but this theoretically should not occur with the MicroCell IP set in the DMZ)
-If using multiple routers, the 3G MicoCell must be connected to the first router connected to the broadband modem
-If the 3G MicroCell is connected to a router that is connected to a modem and both the router and the modem have NAT (Network Address Translation) enabled, disable NAT either in the router or the modem.
NOTE: All ports listed need to be configured for inbound and outbound connections.
(Tried port forwarding bidirectional via LAN settings and even tried when the MicroCell was in the DMZ.)
-123/UDP: NTP timing (NTP traffic)
-443/TCP: Https over TLS/SSL for provisioning and management traffic
-4500/UDP: IPSec NAT Traversal (for all signaling, data, voice traffic)
-500/UDP: IPSec Phase 1 prior to NAT detection (after NAT detection, 4500/UDP is used)
-4500/UDP: After NAT detection, 4500/UDP is used
What are your download and upload speeds? As advertised? 6016 Kbps (downstream) 768 Kbps (upstream)
What kind of internet service do you have (ADSL, cable, WiFi)? ADSL
Are you using the basic connection (modem -> router -> MicroCell) or the alternate connection (modem -> MicroCell -> router)?
Could not get the "basic" connection to work at all with the TP-Link router--it was flaky with the Linksys, but the Linksys was flaky just as a firewall. Going direct, modem -> MicroCell works consistently and perfectly.
What other equipment (computers, WiFi TV’s, Xboxes, Playstations, etc.) do you have connected to your network?
The following are connected to the firewall/router when not testing MicroCell directly:
Airport Extreme 802.11n 4th generation connected via Cat5 to firewall/router, set in bridge mode
Airport Express 802.11n 1st generation connected to Airport Extreme via Cat5, also in bridge mode
NetGear Gigabit unmanaged switch connected via Cat5 to the following devices:
- Apple TV 1st generation connected via Cat5
- 2 macs on Cat5
- Brother all-in-one printer on Cat5
- 2 Windows XP boxes connected on Cat5, but are mostly off
- 3 additional Cat5 cables for working with various other laptops / computers but are not used when testing network
- 3 mac laptops connected on WiFi, off and on depending on who is here
- 3 iPhones connected off and on to WiFi
- 1 Android, rarely connected to WiFi
- Various mobile phones / laptops of friends connected to WiFi when they are here
What does the light pattern look like on the MicroCell (power, ethernet, GPS, and 3G)?
With modem -> router -> MicroCell? Green power, ethernet, GPS, and slow blinking green 3G light
With DSL Modem->MicroCell? All solid green and all iPhones work. (Friends non-iPhones have worked also)
Are they all a solid green or is any of them blinking green or red, and if so, which one?
With DSL Modem->MicroCell, all solid green and all phones work
Does the ac adapter feel warmer than the top of the MicroCell where the vents are? No
Are all of the cables firmly in place? Yes
Have you checked your line speed (http://www.speedtest.net/)? Yes
If so, please post results. Average download runs 1.5 - 5 Mb/s and upload is a more consistent .58-.60 Mb/s
Have you checked to see if you line is adequate for VoIP (http://www.voipqualitytest.com/)? If so, please post your results.
Tried. I've got all computer systems set so tight, nothing would run the java script the website is looking for, but using just DSL modem -> MicroCell, the MicroCell VOIP works consistently. More importantly, text from phones other than iPhones works also.
TP-Link has reporting capability. When I put the MicroCell into the DMZ, I see consistent upload packets but zero download packets.
Hence, the reason for my previous questions regarding known working routers and settings.
I believe that with a reasonable router which does the proper "no manage" thing in the DMZ zone, the MicroCell will work perfectly in "basic" mode because it worked previously.
The challenge is finding the right dual WAN SOHO firewall/router and getting the firewall/router settings correct.