new sub domain do not work

[tyuuu]

hello,

i create a account with domain.com from whm,

and i add two sub domains from cpanel of the account

sub1.domain.com and sub2.domain.com,


but it is very interesting,

sub2.domain.com works well,

but the main domain domain.com and sub1.domain.com only work part times,

how can not make sure why it is ?

and for adding a subdomain,should i wait 24~72 hours to work?



thanks

[eth00]

New subdomain resolution should be pretty fast, like instant fast. If you run your own DNS as soon as the dns server is restarted it is active.

When you say it does not work all of the time, what error do you get?

[tyuuu]

Originally Posted by eth00

New subdomain resolution should be pretty fast, like instant fast. If you run your own DNS as soon as the dns server is restarted it is active.

When you say it does not work all of the time, what error do you get?

i think it may dns problem,

because i try to do tracert domain.com and sub1.domain.com,

it shows can not find the dns.


thanks

[cPanelEricE]

Howdy,

I'd try some forensic DNS testing from a Linux shell.

Try out:

dig +trace sub1.domain.tld

host -a sub1.domain.tld

between those two you should be able to pin it down.

As for working insta-fast on subdomains, it depends on if you've ever looked up the sub before you added it. If you kick open a browser to subdomain.domain.tld before you add it, you're going to be left with a no host in your DNS cache, and likely your ISP's DNS cache. You won't be able to see the subdomain until the cache clears in some cases.

[tyuuu]

hello

Originally Posted by cpanelerice

dig +trace sub1.domain.tld

host -a sub1.domain.tld

do you mean i run the two line on my issused server?

As for working insta-fast on subdomains, it depends on if you've ever looked up the sub before you added it. If you kick open a browser to subdomain.domain.tld before you add it, you're going to be left with a no host in your DNS cache, and likely your ISP's DNS cache. You won't be able to see the subdomain until the cache clears in some cases.

no,i browser them after created the subdomains.

and i try to run "ipconfig /flushdns" on my winxp pc to clean the dns cache,

but it still show well some time and unreachable most time.


thanks

[cPanelEricE]

Howdy,

The problem is even if you've cleared your cache it's still in your ISP's cache. These are commands that I'd recommend running from your network. If you don't have the tools to test with there, I'd recommend submitting a ticket with support.

Thanks!

[tyuuu]

i had created a ticket.

thanks