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Topic # 104692 20-Jun-2012 09:58 Send private message

I'm still trying to get a half bridge setup working correctly and having some issues.

First background: An all in one TP-Link modem\router works fine. I have a master filter installed.

After my previous RTA1320 started behaving oddly, I found another one on trademe. It was sold as new\unused and indeed it looks in pristine condition so I don't think there's anything wrong with it. TBH I took the old one apart and couldn't see anything wrong with it (no bulging capacitors, etc) But the new is exhibiting the exact same issues as the previous one when setup in half-bridge with a gargoyle router. Essentially:

1)  I cannot load certain websites at all (vodafone.co.nz, amazon.com) while others will load

2) If I do a speedtest and select vodafone as the server, the ping seems good, but then it fails to initiate the data download completely.

3) If I select one of the other servers for the speedtest it seems to work ok


And this all happens if I plug directly into the modem, taking the gargoyle router out of the picture.

I seem to remember somewhere reading that certain modem\DSLAM(??) combinations cause issues, is this a possibility?

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  Reply # 643640 20-Jun-2012 10:02 Send private message

First guess would be your MTU is wrong




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  Reply # 643660 20-Jun-2012 10:24 Send private message

Hmm, ok I will check what it's set to on the modem\router that works.

I think it defaults to 1500 on the RTA1320. Are there any others I should try? I can't see any definitive instructions on the vodafone site.

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  Reply # 643667 20-Jun-2012 10:36 Send private message

Are you on the latest firmware?  I recall having an issue with a Dynalink modem where I could never get to certain websites such as adobe.com when in half bridge mode.  It turned out the issue was that adobe.com (and some other websites) have IP addresses in the 192.x.x.x range.  The firmware must have been assuming this entire range was local which is not the case.



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  Reply # 643670 20-Jun-2012 10:39 Send private message

I'm on the original (3.30j?) firmware. Where would I get the latest firmware. Searching for it I see references to 3.64u and 3.64y but also reports that Dynalink don't release it; can anybody email me a copy? :)



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  Reply # 643671 20-Jun-2012 10:40 Send private message

Nvm I found some downloads here:

http://www.cormain.com.au/tech/download.php

Any recommendations for which one?

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  Reply # 643673 20-Jun-2012 10:41 Send private message

dannyres: Are you on the latest firmware?  I recall having an issue with a Dynalink modem where I could never get to certain websites such as adobe.com when in half bridge mode.  It turned out the issue was that adobe.com (and some other websites) have IP addresses in the 192.x.x.x range.  The firmware must have been assuming this entire range was local which is not the case.


A public website can't have a 192.x.x.x IP address, the entire /16 range is reserved for private use only.


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  Reply # 643674 20-Jun-2012 10:42 Send private message

sidefx: Hmm, ok I will check what it's set to on the modem\router that works.

I think it defaults to 1500 on the RTA1320. Are there any others I should try? I can't see any definitive instructions on the vodafone site.


Your DSL MTU will be lower than this. I don't know what Vodafone use but if you're on EUBA you could try 1492.

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  Reply # 643675 20-Jun-2012 10:43 Send private message

sbiddle:
dannyres: Are you on the latest firmware?  I recall having an issue with a Dynalink modem where I could never get to certain websites such as adobe.com when in half bridge mode.  It turned out the issue was that adobe.com (and some other websites) have IP addresses in the 192.x.x.x range.  The firmware must have been assuming this entire range was local which is not the case.


A public website can't have a 192.x.x.x IP address, the entire /16 range is reserved for private use only.


Try pinging adobe.com - I get:

Pinging adobe.com [192.150.16.117] with 32 bytes of data:
Reply from 192.150.16.117: bytes=32 time=184ms TTL=240

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  Reply # 643677 20-Jun-2012 10:45 Send private message

sidefx: Nvm I found some downloads here:

http://www.cormain.com.au/tech/download.php

Any recommendations for which one?


Depending if you have the RTA1320v1 or RTA1320v2 use the (NZ) firmware listed on one of these links:

http://support.netcommwireless.com/product/fixed-line/rta1320
http://support.netcommwireless.com/product/xdsl/rta1320-rev2

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  Reply # 643678 20-Jun-2012 10:46 Send private message

sbiddle:
dannyres: Are you on the latest firmware?  I recall having an issue with a Dynalink modem where I could never get to certain websites such as adobe.com when in half bridge mode.  It turned out the issue was that adobe.com (and some other websites) have IP addresses in the 192.x.x.x range.  The firmware must have been assuming this entire range was local which is not the case.


A public website can't have a 192.x.x.x IP address, the entire /16 range is reserved for private use only.



Nope, only 192.168.0.0/16 is private, the rest of the 192 range is public.

http://en.wikipedia.org/wiki/Private_network




I work for Telecom Spark, but as always my views are my own.

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  Reply # 643679 20-Jun-2012 10:47 Send private message

sbiddle:

A public website can't have a 192.x.x.x IP address, the entire /16 range is reserved for private use only.



Off the top of my head (yeah, probably wrong!) I thought it was 192.168.0.0 / 16 that was reserved for private not 192.0.0.0 /8 so there could be public addresses starting with 192.

EDIT: I see @plambrechtsen beat me to it.

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  Reply # 643681 20-Jun-2012 10:53 Send private message

Oops I wasn't thinking when I posted that, got the /16 bit right though!  Smile

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  Reply # 643683 20-Jun-2012 10:54 Send private message

sbiddle: Oops I wasn't thinking when I posted that, got the /16 bit right though!  Smile


'Spose I'll let you go on that one Laughing




I work for Telecom Spark, but as always my views are my own.



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  Reply # 644015 20-Jun-2012 20:44 Send private message

Sadly neither of these ideas has worked. I've tried MTU at 1492 and the updated firmware. Also had a look at the settings on the modem that works; I haven't changed the MTU on that, and it says it defaults to 1480.

Now.. the bizarre bit is that the RTA1320 was configured to use IP address 192.168.1.1... I've now unplugged the RTA1320 and reconnected to the other modem but I can still ping 192.168.1.1...?

tracert to 192.168.1.1 gives:


Tracing route to 192.168.1.1 over a maximum of 30 hops

1 <1 ms <1 ms <1 ms 192.168.51.1
2 25 ms 24 ms 26 ms be2-100.bras1ldv.akl.vf.net.nz.129.109.203.in-ad
dr.arpa [203.109.129.45]
3 23 ms 23 ms 23 ms be5-100.ppnzldv01.akl.vf.net.nz.129.109.203.in-a
ddr.arpa [203.109.129.46]
4 25 ms 25 ms 24 ms te0-2-0-7-131.ppnzftc01.akl.vf.net.nz [203.109.1
80.5]
5 25 ms 25 ms 25 ms gi15-1-0-131.akl-ftc-edge2.akl.vf.net.nz [203.10
9.180.6]
6 25 ms 28 ms 31 ms gi6-0-0.akl-grafton-edge1.ihug.net [203.109.143.
101]
7 26 ms 25 ms 25 ms 192.168.1.1

Trace complete.

29 posts

Geek


  Reply # 644038 20-Jun-2012 21:49 Send private message

This sounds like a routing issue.  Have you checked the routing table for your modem?
Specifically, are routes via the RTA1320's internal interface (br0) correctly limited to RFC1918 ranges?  The modem's public IP address should also be routed via br0 when it's operating in half-bridged mode.

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