Unlocking BT 2Wire 2700HGV Business Hub (wireless router)

 

Contents > Troubleshooting:

 

 

 


Problem using PPPoE

 

John had been using a Single SSID hub loaded with SBC firmware for a few months on his broadband connection (outside of the UK).   His ISP called for the following settings.

Connection Type

PPPoE

VCI/VPI

0/35

ATM Encapsulation

Routed LLC

PPP Authentication

ISP supplied username (with no @realm)

When the hub developed a fault (not able to detect ADSL signal), he acquired a newer BT v6 hub.   Unfortunately, he has been unable to configure the hub to connect to his ISP.

The issue is the BT v6 hub won't permit the combination of Routed LLC (Routed VC-Mux) to be used when PPPoE is chosen, when trying to save the ADSL settings through the home > Settings > Broadband > Link Configuration page.

I've noticed the same symptoms on my BT v5.29.117.6 and SBC v5.29.117.3 firmware hubs when attempting to edit the Broadband Link > Advanced Settings page.

John did add that if he used the Setup Wizard from the main hub home page, on his faulty hub with SBC firmware, the wizard did permit Routed LLC and PPPoE to be saved as a combination.





 

Web pages timing out. DNS problem

(Added 30 Sep 11): 

I saw this thread posted on BT business broadband forum.

The DNS service running on the hub appears to stop responding for whatever reason, and users witness 'Page not found' errors with their web browser.

The thread suggests it is due to the DNS service stopping and restarting.

The above thread also references this thread, where one user was able to resolve the problem by reconfiguring their 2700 to use alternative faster DNS servers. It refers to the GRC DNS benchmarking tool for DNS.



I have not yet witnessed this issue where the DNS service appears to stop and restart, but I have witnessed a similar issue where DNS requests appear to time out leading to 'Page not found' errors in Internet Explorer. I can some times reproduce the symptoms on a 2700HGV (tested on BT v6.1.1.48 firmware) if I use one wireless laptop to download 2 files directly from websites and maxing out my internet connection. If I then use a second wireless laptop to try and navigate to a different website, Internet Explorer often times out. Executing a Ping command also results in DNS failure. If I reconfigure the 2nd wireless laptop to use a static IP address and configure it to use my ISP's DNS servers, I have no difficulty navigating or pinging websites.




ERR_DMA and ADSL Disconnections

(Added 19 Nov 12): 



Recently, I started encountering an intermittent issue where my 2700HGV would lose ADSL line sync with the exchange when I tried to load a new web page using my laptop (RaLink 802.11n wifi). This only seemed to occur when the hub was already being 'stressed' with sopcast p2p video traffic to an ethernet attached media player. On the 6mb ADSL connection, the average downstream rate for the p2p traffic was about 1mbps, upstream rate around 300kbps, but as with other p2p traffic like bittorrent, the hub probably has to manage several hundred sessions. Surfing the web was pretty sluggish using the laptop.

Googling '2wire ERR_DMA' reported in the 'DSL Diagnostics – Training History' quickly revealed several threads describing what may be causing the issue. The wireless implementation on the hub may be to blame.

One of many threads describing ERR_DMA error

As a test, I've now disabled the wireless on the 2700HGV (v6.3.9.63-plus.tm) router, and connected it to a spare 2701HGV-C (v6.3.9.41-plus.tm) configured as a wireless access point (ie. Changed this hub's IP address to 192.168.1.248 and disabled DHCP server in the 'Private Network' menu).

I use 802.11g Wireless mode, with WPA2-PSK.

I've also adjusted the Firewall Attack Detection settings as described here.



(Added 2 Mar 13):

More than 3 months has passed and I can confirm disabling the wireless has resolved the above issue.











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