Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations TouchToneTommy on being selected by the Tek-Tips community for having the most helpful posts in the forums last week. Way to Go!
1 URL 2 IP's is clustering the answer?
- Thread starter tangostar
- Start date
tangostar,
Clustering would not provide you with two IP's. It sounds more like load-balancing would be the way to go, depending on the specifics of what you want to accomplish.
Wishdiak
A+, Network+, MCSA 2003 certified
Clustering would not provide you with two IP's. It sounds more like load-balancing would be the way to go, depending on the specifics of what you want to accomplish.
Wishdiak
A+, Network+, MCSA 2003 certified
GlenJohnson
MIS
What are you trying to do?
Glen A. Johnson
If you're from Northern Illinois/Southern Wisconsin/Central Florida feel free to join the Tek-Tips in Chicago, Illinois Forum.
TTinChicago
Johnson Computers
![[xmastree]](/data/assets/smilies/xmastree.gif "[xmastree] [xmastree]")
- Thread starter
- #4
This won't work as you expect it to. Let's say for example you have:
web.domain.com IN A 1.2.3.4
IN A 5.6.7.8
So a user on the internet tried to connect to web.domain.com and sends a DNS request to their ISP's DNS server which then queries your server and your server gives the answer 1.2.3.4 (it will round robin the answers per request). That user will then be trying to connect to 1.2.3.4. If this IP address is down then the other will not be tried because the local DNS server will now have cached that IP address. The connection will simply fail. The DNS server does not care that the IP address is down.
Chris.
**********************
Chris Andrew, CCNA, CCSA
chris@iproute.co.uk
**********************
web.domain.com IN A 1.2.3.4
IN A 5.6.7.8
So a user on the internet tried to connect to web.domain.com and sends a DNS request to their ISP's DNS server which then queries your server and your server gives the answer 1.2.3.4 (it will round robin the answers per request). That user will then be trying to connect to 1.2.3.4. If this IP address is down then the other will not be tried because the local DNS server will now have cached that IP address. The connection will simply fail. The DNS server does not care that the IP address is down.
Chris.
**********************
Chris Andrew, CCNA, CCSA
chris@iproute.co.uk
**********************
tangostar,
iproute is right on the money. Server clustering, where you have multiple servers responding to a single IP address, would provide the fault tolerance that you're looking for, but you would need to set this up on your own equipment.
Is it critical to your business that your web servers have absolutely 0% downtime?
Wishdiak
A+, Network+, MCSA 2003 certified
iproute is right on the money. Server clustering, where you have multiple servers responding to a single IP address, would provide the fault tolerance that you're looking for, but you would need to set this up on your own equipment.
Is it critical to your business that your web servers have absolutely 0% downtime?
Wishdiak
A+, Network+, MCSA 2003 certified
- Thread starter
- #7
No, because you can't guarantee that the DNS server won't give out the same address again. If you want high availability, DNS round robin is not the way to go.
If you want high availability internet connectivity then you would have to look at BGP to two (or more) ISP's and clustering with your own IP range.
Chris.
**********************
Chris Andrew, CCNA, CCSA
chris@iproute.co.uk
**********************
If you want high availability internet connectivity then you would have to look at BGP to two (or more) ISP's and clustering with your own IP range.
Chris.
**********************
Chris Andrew, CCNA, CCSA
chris@iproute.co.uk
**********************
- Status
Similar threads
- Locked
- Question
- Locked
- Question