Public bug reported: Release: 12.04 Hardware: HP Compaq 6910p Laptop
If the backup DNS server is unreachable, dnsmasq does not try to reach primary DNS server. In the following default configuration (clean install of 12.04) 1 out of 4 DNS queries fail. (DNSMasq seems to rotate queries between the listed servers) wlightning@archon:~$ cat /run/nm-dns-dnsmasq.conf server=75.75.75.75 server=75.75.76.76 wlightning@archon:~$ wlightning@archon:~$ cat /etc/resolv.conf # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8) # DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN nameserver 127.0.0.1 search hsd1.or.comcast.net wlightning@archon:~$ wlightning@archon:~$ nm-tool NetworkManager Tool State: connected (global) - Device: ttyUSB0 -------------------------------------------------------------- Type: Mobile Broadband (CDMA) Driver: sierra State: disconnected Default: no Capabilities: - Device: wlan0 ---------------------------------------------------------------- Type: 802.11 WiFi Driver: iwl4965 State: unavailable Default: no HW Address: 00:1D:E0:35:69:AF Capabilities: Wireless Properties WEP Encryption: yes WPA Encryption: yes WPA2 Encryption: yes Wireless Access Points - Device: eth0 [Wired connection 1] ------------------------------------------- Type: Wired Driver: e1000e State: connected Default: yes HW Address: 00:1B:38:E7:F5:02 Capabilities: Carrier Detect: yes Speed: 1000 Mb/s Wired Properties Carrier: on IPv4 Settings: Address: 10.0.0.11 Prefix: 24 (255.255.255.0) Gateway: 10.0.0.1 DNS: 75.75.75.75 DNS: 75.75.76.76 wlightning@archon:~$ mtr of 75.75.75.75 (anycast addr): My traceroute [v0.80] archon (0.0.0.0) Sun Apr 29 10:13:58 2012 Keys: Help Display mode Restart statistics Order of fields quit Packets Pings Host Loss% Snt Last Avg Best Wrst StDev 1. 10.0.0.1 0.0% 51 0.6 0.6 0.6 1.5 0.2 2. 73.94.124.1 0.0% 51 9.0 9.2 7.1 14.7 1.5 3. 68.85.148.1 0.0% 51 7.9 10.6 7.4 24.7 4.0 4. 68.87.216.13 0.0% 51 9.2 19.8 8.5 150.8 29.0 5. 68.87.218.162 0.0% 50 10.8 14.1 8.1 85.0 13.4 68.87.218.158 6. 68.87.216.41 0.0% 50 9.5 13.2 9.5 67.4 8.6 7. 75.75.75.75 0.0% 50 9.9 11.0 9.1 17.2 1.8 mtr of 75.75.76.76 (anycast addr): My traceroute [v0.80] archon (0.0.0.0) Sun Apr 29 10:12:42 2012 Keys: Help Display mode Restart statistics Order of fields quit Packets Pings Host Loss% Snt Last Avg Best Wrst StDev 1. 10.0.0.1 0.0% 51 0.6 0.8 0.5 3.6 0.5 2. 73.94.124.1 0.0% 51 9.0 9.3 7.0 18.3 2.5 3. 68.85.148.9 0.0% 51 7.3 9.6 7.2 22.3 2.9 4. 68.85.243.253 0.0% 51 8.3 13.8 7.5 81.9 15.6 5. 68.86.95.97 0.0% 51 14.5 17.2 11.9 33.0 4.4 68.86.91.197 68.86.90.213 68.86.95.93 68.86.95.89 6. 68.86.95.214 0.0% 51 39.5 41.5 38.1 74.5 6.4 7. 68.86.199.130 0.0% 51 51.9 40.8 38.2 55.3 3.3 8. 75.75.76.76 44.0% 50 38.5 40.2 38.3 46.2 2.2 ** Affects: network-manager (Ubuntu) Importance: Undecided Status: New ** Tags: comcast dnsmasq network-manager redundency resolv.conf -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/991308 Title: DNS Querying fails if any DNS server is unreachable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/991308/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs