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320 posts

Ultimate Geek
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Topic # 112434 8-Dec-2012 16:42 Send private message

Have setup a half bridge between my RTA 1320 and TP Link 1043ND using Gargoyle

The 1320 has IP address - 192.168.1.1 and DHCP range 192.168.1.2 - 192.168.1.254

The 1043ND has IP address - 192.168.0.2 and DHCP range 192.168.0.10 - 192.168.0.254

The 1320 is set to PPP IP extension with NAT turned off following the guide here http://www.ben.geek.nz/2006/11/adsl-routing-solution-in-detail/

When connected to the Modem directly the internet works ok and the laptop gets assigned a public IP
but when connecting to the WAN port of the 1043ND the router is not recieving a DHCP address from the modem. I have the WAN setting set to recieve DHCP wan ip's, but it is just blank with no ip address being recieved from the modem.

What is going on?

Is there any other settings in Gargoyle that need to changing to work with the half bridged 1320?

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2633 posts

Uber Geek
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  Reply # 729065 8-Dec-2012 19:04 Send private message

I have seen an issue where a device essentially complained about half bridge (OS X machine connected directly to an RTA1320 in half bridge), saying that 2 devices had the same [external] IP. I wonder if Gargoyle is having a similar issue?

What happens if you disconnect the WAN (ADSL) from the RTA1320? It should then assign an IP in it's own subnet (so you can access the admin side), rather than the external IP via DHCP - does Gargoyle pick that up OK?



320 posts

Ultimate Geek
+1 received by user: 1


  Reply # 729991 10-Dec-2012 21:30 Send private message

So i tested RunningMans suggestion and with no adsl line connected the 1043ND picked up the wan address fine and i could connect to both the modem and the router from a connected laptop.

The 1043ND picked up 192.168.1.2 from the router and dhcp'd 192.168.0.185 to the laptop.

I was much more careful with the poweing up and connecting this time, where by i connected the modem to the router then powered on the modem waited 2 minutes then powered on the router. Maybe this had something to do with it.

Will test with the ADSL again at a socially acceptable time to lose the internet for a while so i can play with it. (not very often) and make sure i power everything on in order this time.

2633 posts

Uber Geek
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  Reply # 730010 10-Dec-2012 22:09 Send private message

Perhaps it was the DHCP lease time on the modem - set it down to 5 minutes or so otherwise if/when the connection drops, or a new IP is assigned, then it will take a long for the router to pick up the new address (meaning no connection to the outside world).



320 posts

Ultimate Geek
+1 received by user: 1


  Reply # 730014 10-Dec-2012 22:19 Send private message

I set it to 30 minutes today before the final connections, is there any disadvantage to setting the lease time very short, apart from i guess more work for the modem.

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Uber Geek
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  Reply # 730026 10-Dec-2012 22:35 Send private message

From memory you don' need to turn NAT off in the 1320, with the last firmware just checking IP Extension should set everything.

Try changing the LAN ip range of one of the devices to a different class, eg: 10.0.0.x / 255.0.0.0

2633 posts

Uber Geek
+1 received by user: 386


  Reply # 730144 11-Dec-2012 08:50 Send private message

hazza87: I set it to 30 minutes today before the final connections, is there any disadvantage to setting the lease time very short, apart from i guess more work for the modem.


There is obviously some work from both sides to re-negotiate the lease each time, but it will be negligible, as there is only ever one client - not like you have 250 odd clients in a subnet renewing every 5 mins.

The shorter lease time means it will recover quicker from a change of external IP, or dropping the WAN totally (and therefore giving out a local IP for admin).



320 posts

Ultimate Geek
+1 received by user: 1


  Reply # 730293 11-Dec-2012 11:32 Send private message

From memory of setting up the ppp ip extension on the dynalink when ticking ip extension NAT is automatically unticked and i dont think it can be ticked again. Am running the latest firmware 3.64y.

What would be the advantage of enabling nat on the modem, i assume that the router will take of this fine.

Will set the lease time to 5 minutes and test out with ADSL hopefully tonight.

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Uber Geek
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  Reply # 730327 11-Dec-2012 12:00 Send private message

hazza87:

What would be the advantage of enabling nat on the modem, i assume that the router will take of this fine.

The idea of half bridge is it avoids double NAT - your router will be doing the NAT.


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  Reply # 730458 11-Dec-2012 13:56 Send private message

Yeah I meant setting IP extension in the RTA1320 should automatically set NAT to what it needs (disabled) and should already set a short lease time for DHCP... can't remember though.

Also did you try changing the the "LAN" to the class A private range 10.0.0.0/8 (255.0.0.0) in the Gargoyle router?



320 posts

Ultimate Geek
+1 received by user: 1


  Reply # 730842 11-Dec-2012 21:51 Send private message

Managed to get it going tonight, all seems to be going well Router is receiving 27.252.40...... from the modem and assigning DHCP addresses to all the clients fine.
Can access the internet and the Router admin interface, seems i can also access the modem admin interface all be it very very slowly! 

However major issue, Speedtest has gone from 14.04 Mb/s download before to 0.86Mb/s after

Upload and ping stayed pretty consistant, modem interface shows pretty similar stats 

Line Rate:
15873Kbps Down
1001 - Kbps Up

Attainable Line Rate:
19072 Kbps - Down
993 Kbps - Up

Line attenuation and snr margins pretty much exactly the same, what could be causing this?



320 posts

Ultimate Geek
+1 received by user: 1


  Reply # 731887 13-Dec-2012 10:55 Send private message

Any ideas?

Seems to be all over the place at the moment, last night it was up to about 11Mb/s download and this morning it is back to 1MB/s. Used to be pretty rock solid at 12-16Mb/s at all times prior to changing to the half bridge setup.

MTU settings? Bandwidth monitoring on the Gargoyle? Ping to router and modem both seem fine from connected devices.

253 posts

Ultimate Geek
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  Reply # 731902 13-Dec-2012 11:12 Send private message

Have you done the same speed tests with the computer connected directly to the modem, to eliminate the router in the equation?

Also who is your ISP and are you checking at peak loaded times of the day? Speedtest to which server?

Etc
etc



320 posts

Ultimate Geek
+1 received by user: 1


  Reply # 731923 13-Dec-2012 11:27 Send private message

Have tested at various times of the day 8:30am 9:30am 5pm 10pm etc
Using speedtest.net to a few different servers for each test, all the local servers give virtually identical results.

Will check when connected just to the modem shortly after getting a slow result ideally, otherwise it wouldn't tell me anything.

EDIT: ISP is Vodafone running from Cabinet about 500m down the road so not red network.



320 posts

Ultimate Geek
+1 received by user: 1


  Reply # 733671 17-Dec-2012 15:48 Send private message

Narrowed it down a bit more, seems to go at 1-2Mbs in the morning 9am ish and when i get home from work at 5 it is always going at 12-14Mbs. I am sure before the change or modem router it used to be pretty solid at around 14Mbs
Really not sure what could be causing this.

2633 posts

Uber Geek
+1 received by user: 386


  Reply # 733705 17-Dec-2012 16:27 Send private message

Is the DSL sync rate staying the same at this time?

Is there something else soaking up all your bandwidth at that time? Some sort of scheduled download / system update?

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