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wildbill442
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Dynamic DNS servers lost - PPPoE ROS v6.7

Wed Feb 26, 2014 8:10 pm

Seeing a more reoccurring theme here.

Customer calls in with connection problems, and no DNS servers are listed on the router. DNS servers are obtained automatically via PPPoE. When logging into the router Dynamic DNS servers are blank, so no DNS resolution occurs.

Upgraded to 6.10, however, nothing in the changelog suggests this has been addressed. Please advise.

I'm opening a support ticket as well.
 
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Re: Dynamic DNS servers lost - PPPoE ROS v6.7

Wed Feb 26, 2014 9:20 pm

Since 2007 I use "Peer DNS" on PPPoE Client.
Never happened that problem.
Last edited by rextended on Mon Mar 20, 2023 5:13 pm, edited 1 time in total.
 
michall53
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Re: Dynamic DNS servers lost - PPPoE ROS v6.7

Thu Feb 27, 2014 8:41 pm

I have the same problem I was previously ROS 6.5 there were no such reports, I uploaded 6.10 and there are problems with DNS.
 
wildbill442
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Re: Dynamic DNS servers lost - PPPoE ROS v6.7

Wed Mar 05, 2014 2:18 am

Since 2007 I use "Peer DNS" on PPPoE Client.
Never happened that problem.

Sample from RouterOS 6.7 on my real gateway (except gateway IP = 1.1.1.1):

ros code

/ip dns
set allow-remote-requests=yes cache-max-ttl=1h cache-size=4096KiB servers=8.8.8.8

/ip pool
add name="pool Le Forane" ranges=100.100.16.0/24

/ppp aaa
set interim-update=5m use-radius=yes

/ppp profile
add address-list=auto_lista_ip_pppoe change-tcp-mss=yes dns-server=1.1.1.1 local-address="pool Le Forane" name="profilo Le Forane" use-encryption=yes

/interface pppoe-server server
add authentication=mschap2 default-profile="profilo Le Forane" disabled=no interface="EoIP Le Forane E" keepalive-timeout=30 mrru=1614 one-session-per-host=yes service-name="pppoe Le Forane E"
and on CPE (except username/password obviously):

ros code

/ip dns
set allow-remote-requests=yes cache-max-ttl=1d cache-size=2048KiB max-udp-packet-size=4096

/interface pppoe-client
add add-default-route=yes allow=pap,chap,mschap1,mschap2 dial-on-demand=no disabled=no interface=wlan1 max-mru=1480 max-mtu=1480 mrru=1614 name=pppoe-client password=password profile=default-encryption use-peer-dns=yes user=username
Peer-DNS == Dynamic DNS...

I'm using the same settings. However DNS servers are randomly lost by the CPE device, or are not obtained at all upon initial connection.

It's very random, but becoming more prevalent as we deploy the newer ROS versions.
 
wildbill442
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Re: Dynamic DNS servers lost - PPPoE ROS v6.7

Fri Mar 07, 2014 6:19 pm

This is also happening on 6.10. I'll try and get a supout.rif after it happens.
 
thegreatone
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Re: Dynamic DNS servers lost - PPPoE ROS v6.7

Tue Apr 01, 2014 11:16 pm

Any fix for this? I have the same problem.

Some of my customers with home use routers are not getting internet connection, I mean they are not getting dns servers automatically from pppoe server but when I put manual dns servers it works fine.

This is happening only on some routers. When connected directly on PC there is no issues.
 
thegreatone
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Re: Dynamic DNS servers lost - PPPoE ROS v6.7

Sun Jun 15, 2014 4:00 am

Mikrotik support team, did you read this topic? This is an important bug, not fixed in latest 6.15.

I also sent supout.rif in support ticket.
 
jarda
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Re: Dynamic DNS servers lost - PPPoE ROS v6.7

Sun Jun 15, 2014 8:45 am

It happened to me recently after installing 6.15 over 6.13 on grooveA2hn. One additional reboot solved the situation and it has not repeaten.
http://forum.mikrotik.com/viewtopic.php?t=85950
 
thegreatone
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Re: Dynamic DNS servers lost - PPPoE ROS v6.7

Mon Jun 16, 2014 3:45 pm

It happened to me recently after installing 6.15 over 6.13 on grooveA2hn. One additional reboot solved the situation and it has not repeaten.
http://forum.mikrotik.com/viewtopic.php?t=85950
The bug on this topic is related to PPPoE server not sending out DNS addresses to some routers.
 
wildbill442
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Re: Dynamic DNS servers lost - PPPoE ROS v6.7

Thu Jun 26, 2014 12:52 am

I've also seen some routers with the same dynamic primary and secondary servers listed 10-20+ times repeatedly.

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