Airtel Broadband Slow DNS?

[imagegrill]

I have a Beetel 220 BX modem.

DSL Settings:
G.Dmt - enabled
G.Lite - Enabled
T1.4B - enabled
ADSL2 - Enabled
AnnexL - Enabled
ADSL2+ - Enabled
Bit Swap - Enabled

DSL Status
Statue - Showtime
Mode - ADSL2+

[the following are in Downstream/ Upstream order]
Rate Kbps 2772/ 573
SNR Margin (dB) 20.4/19.7
Attenuation (dB) 17.5/ 9.4
Output Power (dBm) -12.3/ 3.9

WAN
Bridge Setting as I am using a wireless router.

Tried Firefox and open DNS put result no better!

Sent wireshark trace to thesilentshadow so let see what that gives

 

[kanishka]

man slow dns doesn't means that u r modem has some problem ......

try my signature ..

https://broadband.forum/bsnl-broadband/39049-dns-servers/

 

[superprash2003]

you mean slow browsing speed? your downloads are fine?

 

[imagegrill]

Download speeds are indeed fine and having tried the open DNS I am satisfied that it is not an Airtel DNS issue.Perhaps a better description would be slow browsing experience. Actually, painfully slow and sometimes none existent browsing experience.Maybe it is down to a modem issue, let see how that works. I need to prove that so I can convince Airtel to get me a new one.....The netbook is going to be tried on another wifi connection just to confirm the netbook is not the problem....

 

[superprash2003]

have you tried changing MTU values?

 

[arjie]

Are you certain it's a problem with the Airtel DNS servers? Here are the Airtel DNS addresses I know of:203.145.184.13203.145.184.40Requesting a lookup from them results in an answer in 28-32 ms. However, on other occasions it can go up to 80 ms.

 

[TheSilentShadow]

Had a look at your wireshark trace and it seems to me that you have an abnormally high number of reset flags set in your tcp packets going out from your modem. A reset flag in a packet asks for an termination of that particular connection and it needs to be re-established. I'm not sure why yet though, but what it means is that your connections to a website may be getting re-established multiple times before it loads successfully, hence the slow load times.Try replacing the modem.Edit: I think that wireshark trace should be sufficient cause to indicate a fault and be enough for a modem replacement.

 

[demigod]

@op i have the exact problem you mentioned :wall: . some time dns lookup fails randomly.when i use OpenDns it works some what better than Airtel DNS i mean speed wise.But the weird problem is when i do Hard/Soft restart it reverts back to default settings. Some times even username and password reverts to default.no solution yet ?a doubt ? i have some 16K~ entries in host file can it be a also problem for slow browsing ..Note: this problem started since old modem died because of lightning and new modem replaced.can it be a problem too ?

 

[iChaitanya]

Airtel West DNS is dead for me. Using OpenDNS.

 

[tech_help]

Airtel DNS sucks right now!
Using opendns

For people who don't know about opendns can read here.
https://www.opendns.com/start/