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MW



20 posts

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Topic # 57227 6-Feb-2010 10:37
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Hi people

I have been having ongoing issues recently. It appears to be related to DNS. I am on the fusion plan.

When I set up the ADSL connection, my router WAG54GP2 is allocated 2 DNS servers:
58.28.5.2





58.28.6.2





I telnet to the WAG54GP2, login as admin and then:
   Router(main)#ping 58.28.5.2
   PING 58.28.5.2 (58.28.5.2): 56 data bytes

   --- 58.28.5.2 ping statistics ---
   4 packets transmitted, 0 packets received, 100% packet loss
   Router(main)#ping 58.28.6.2
   PING 58.28.6.2 (58.28.6.2): 56 data bytes
   64 bytes from 58.28.6.2: icmp_seq=0 ttl=60 time=50.0 ms
   64 bytes from 58.28.6.2: icmp_seq=1 ttl=60 time=40.0 ms
   64 bytes from 58.28.6.2: icmp_seq=2 ttl=60 time=40.0 ms
   64 bytes from 58.28.6.2: icmp_seq=3 ttl=60 time=50.0 ms

   --- 58.28.6.2 ping statistics ---
   4 packets transmitted, 4 packets received, 0% packet loss
   round-trip min/avg/max = 40.0/45.0/50.0 ms

The primary DNS appears to be down. Despite this, the WAG picks up and uses the secondary DNS for between a few minutes and a few hours and then the local DNS proxy server on the WAG collapses in a heap and everything using the WAG DNS comes to a grinding halt. The only way to resolve this is to either reboot the router or to tear down the ADSL connection and re-establsh. This temporarily resolves this issue again, but this is not a suitable long term solution.

I have also got RTA1025W that exhibits similar behaviour when it replaces the WAG54GP2. Unfortunately, it does not have a telnet interface (that I am aware of) and I therefore cannot definitively test whether it has exactly the same issue.

Do I have 2x faulty routers or is there something else at play here?
TIA
Mark

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  Reply # 296620 6-Feb-2010 14:58
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Your DNS settings are correct. I also can not ping the primary DNS, but my connection is stable using WRTP54G with AM300 modem on Fusion. Perhaps somehow the issue is not with your modem? Or is the issue when your IP address gets renewed?

Doesn't the RTA have a ping function in the web interface? Or ping from windows.




You can never have enough Volvos!


MW



20 posts

Geek


  Reply # 296756 7-Feb-2010 13:32
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On further review, it appears that:
1. The first DNS server is up, it simply does not honour pings, but can be reached using the host command.
2. The dns server on the WAG collapses in a heap after being up for a certain period of time. This may be a memory issue or some other undisclosed issue. My research has not turned up anything more on this. Perhaps it is simply the router I am using. I have upgraded the firmware to the latest available .06, but it still collapses in a heap.

I have now set up a DNS server on another machine on the network to see if that can function reliably for a time. So far so good. Only time will tell ...

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  Reply # 299741 17-Feb-2010 12:46
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Hi Mark,
you don't have a faulty modem.
I'm having exactly the same issues recently, with exactly the same model modem.

I haven't done much troubleshooting yet as I haven't got annoyed enough.
Plus I'm not home during the day to call xnet, and don't want to pay for the calls from my mobile when the phone is taken down too.

This problem has happened in the past for us, come right for a number of weeks/months, but has reoccured more frequently over the last couple of weeks. Since yesterday it's been up and down all day.

Matt
 

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