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2

when IPv6 connectivity is broken, what's the best option : disabling ipv6 vs installing miredo?

rated 0 times [ 2] [ 0] / answers: 1 / hits: 1440 / 2 Years ago, wed, february 2, 2022, 6:53:37

I've finally found why my Google Chrome is so slow. And I've found these 2 posts.
The first on Google Chrome forum and the second one here.
The solution suggested in the second post requires a modification of /etc/modprobe.d/aliases, but on my Ubuntu 11.04 I don't have such a file.

None of the resources i found would work on 11.04. Can anyone use anything that has worked and which is easily revertible?

Below are the result of dig aaaa he.net and dig a he.net

joseph@joseph-off-lap:~$ dig aaaa he.net



; <<>> DiG 9.7.3 <<>> aaaa he.net

;; global options: +cmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 15618

;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 5, ADDITIONAL: 7



;; QUESTION SECTION:

;he.net.                IN  AAAA



;; ANSWER SECTION:

he.net.         58616   IN  AAAA    2001:470:0:76::2



;; AUTHORITY SECTION:

he.net.         2031    IN  NS  ns2.he.net.

he.net.         2031    IN  NS  ns3.he.net.

he.net.         2031    IN  NS  ns4.he.net.

he.net.         2031    IN  NS  ns5.he.net.

he.net.         2031    IN  NS  ns1.he.net.



;; ADDITIONAL SECTION:

ns1.he.net.     2044    IN  A   216.218.130.2

ns2.he.net.     2044    IN  A   216.218.131.2

ns2.he.net.     73027   IN  AAAA    2001:470:200::2

ns3.he.net.     2044    IN  A   216.218.132.2

ns3.he.net.     62719   IN  AAAA    2001:470:300::2

ns4.he.net.     2044    IN  A   216.66.1.2

ns4.he.net.     62719   IN  AAAA    2001:470:400::2



;; Query time: 134 msec

;; SERVER: 80.87.78.4#53(80.87.78.4)

;; WHEN: Mon Jul  4 17:02:33 2011

;; MSG SIZE  rcvd: 290



joseph@joseph-off-lap:~$ dig a he.net



; <<>> DiG 9.7.3 <<>> a he.net

;; global options: +cmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 31069

;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 5, ADDITIONAL: 7



;; QUESTION SECTION:

;he.net.                IN  A



;; ANSWER SECTION:

he.net.         58533   IN  A   216.218.186.2



;; AUTHORITY SECTION:

he.net.         1948    IN  NS  ns4.he.net.

he.net.         1948    IN  NS  ns5.he.net.

he.net.         1948    IN  NS  ns1.he.net.

he.net.         1948    IN  NS  ns2.he.net.

he.net.         1948    IN  NS  ns3.he.net.



;; ADDITIONAL SECTION:

ns1.he.net.     1961    IN  A   216.218.130.2

ns2.he.net.     1961    IN  A   216.218.131.2

ns2.he.net.     72944   IN  AAAA    2001:470:200::2

ns3.he.net.     1961    IN  A   216.218.132.2

ns3.he.net.     62636   IN  AAAA    2001:470:300::2 

ns4.he.net.     1961    IN  A   216.66.1.2

ns4.he.net.     62636   IN  AAAA    2001:470:400::2



;; Query time: 190 msec

;; SERVER: 80.87.78.4#53(80.87.78.4)

;; WHEN: Mon Jul  4 17:03:56 2011

;; MSG SIZE  rcvd: 278

below are the result for ping and ping6

joseph@joseph-off-lap:~$ ping -c 5 he.net

PING he.net (216.218.186.2) 56(84) bytes of data.

64 bytes from he.net (216.218.186.2): icmp_req=1 ttl=45 time=277 ms

64 bytes from he.net (216.218.186.2): icmp_req=2 ttl=45 time=275 ms

64 bytes from he.net (216.218.186.2): icmp_req=3 ttl=45 time=277 ms

64 bytes from he.net (216.218.186.2): icmp_req=4 ttl=45 time=275 ms

64 bytes from he.net (216.218.186.2): icmp_req=5 ttl=45 time=275 ms



--- he.net ping statistics ---

5 packets transmitted, 5 received, 0% packet loss, time 21209ms

rtt min/avg/max/mdev = 275.675/276.405/277.621/0.995 ms





joseph@joseph-off-lap:~$ ping6 -c 5 he.net

connect: Network is unreachable

joseph@joseph-off-lap:~$

as suggested i'm leaning towards installing miredo .is there any configurations/tweaks to make it works? what would you say about disabling ipv6 vs installing miredo ?

thanks for reading this. ;)

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answered 2 Years ago darpose · Accepted Answer

When Chrome is slow to start loading the page but once it starts loading the page it's fast, there are two things that could be going wrong. The first possibility is that your computer is using a buggy DNS server that doesn't handle requests for IPv6 addresses well. The second possibility is that your computer thinks it has internet IPv6 connectivity when in reality it doesn't.

Run dig aaaa he.net and dig a he.net. Each one will list a Query time. The times should be within ~200msec of each other. If they are not, you DNS server is what is causing this slowness.

One case to test for is how fast the DNS server will tell you that a website does not have an IPv6 address. You can test this by running something like dig aaaa bluecc.edu. It's Query time should be similar to the other times you ran 'dig'. The important thing is that the Query time is short.

IPv6 access itself could be broken. You can test by running ping -c 5 he.net and ping6 -c 5 he.net. The 'time' for the ping6 should be comparable to just ping, and the 'time' should be at least less 1000 msec. If the ping6 is giving you destination unreachable errors, then your IPv6 connectivity is broken. In that case, you have two options. One is to disable IPv6 and the other is to install miredo, which will make an IPv6 tunnel, which should fix any connectivity problems. (You shouldn't have to do anything to set up miredo. It should just work. It's also easy to remove if you ever need to with sudo apt-get remove miredo)