DNS Master/Slave w/ two different IP ranges? 1

[MelvinM]

Hi all.

Is it possible to have two nameservers w/ different IPs. NS1 w/ ISP X's IP Number. And NS2 w/ ISP Y's IP Number?

I'm used to them both being close together, say

NS1 = 202.34.65.64
NS2 = 202.34.65.65

but what about

NS1 = 202.34.65.64
NS2 = 64.45.45.2

This will serve my network. If one provider goes down, then the other DNS server can pick up.

Thanks!

 

[pansophic]

That shouldn't be a problem at all. Lots of people use a secondary or tertiary DNS that comes from another provider.

Here's an example:

<code>
dig -t ns sprint.net

;; ANSWER SECTION:
sprint.net. 68454 IN NS ns1-auth.sprintlink.net.
sprint.net. 68454 IN NS ns2-auth.sprintlink.net.
sprint.net. 68454 IN NS ns3-auth.sprintlink.net.


dig ns1-auth.sprintlink.net

;; ANSWER SECTION:
ns1-auth.sprintlink.net. 171257 IN A 206.228.179.10

dig ns2-auth.sprintlink.net

;; ANSWER SECTION:
ns2-auth.sprintlink.net. 84826 IN A 144.228.254.10
</code>

As you can see, the primary and secondary nameservers are in completely different address ranges.

Of course, these are probably all run by Sprint, but it is likely that they are geographically diverse, so they fit into Sprints Business Continuity plan.


pansophic

 

[pansophic]

That shouldn't be a problem at all. Lots of people use a secondary or tertiary DNS that comes from another provider.

Here's an example:

<code>
dig -t ns sprint.net

;; ANSWER SECTION:
sprint.net. 68454 IN NS ns1-auth.sprintlink.net.
sprint.net. 68454 IN NS ns2-auth.sprintlink.net.
sprint.net. 68454 IN NS ns3-auth.sprintlink.net.


dig ns1-auth.sprintlink.net

;; ANSWER SECTION:
ns1-auth.sprintlink.net. 171257 IN A 206.228.179.10

dig ns2-auth.sprintlink.net

;; ANSWER SECTION:
ns2-auth.sprintlink.net. 84826 IN A 144.228.254.10
</code>

As you can see, the primary and secondary nameservers are in completely different address ranges.

Of course, these are probably all run by Sprint, but it is likely that they are geographically diverse, so they fit into Sprint's Business Continuity plan.


pansophic

 

[MelvinM]

thanks!