Hi again
I've been looking at/testing our ability to failover our website from the primary ISP IP address to the backup ISP IP address whilst still using the same URL. I have 1 virtual server for each ISP IP address and they are both in an Inbound Wide IP for the URL.
If I disable the virtual server for the primary ISP I cannot access the website via the URL anymore [I tried for 10 mins], so I guess DNS entries are not being updated on local internet name servers. Looking in Statistics>Local Traffic>Local DNS there are "no records to display" [I guess this means local name servers are not making any DNS requests to my F5's?].
I found the following information on another site:
"The F5 Link Controller has a built in Dynamic DNS server called Zonerunner. You make it the Authoritative Sever for the FQDN you need load balanced. You then configure Listeners on the LC for each link (NS1, NS2). The LC will have WideIP's, which are A records with addresses on both links address space. The LC will receive DNS requests on either link and respond with the IP address of the active links address space. "
Is this correct? The only other reference I can find to Zonerunner is on GTM not LC. If so, how do I go about making zonerunner the Authoritative Sever for my FQDN? Also, is 10minutes enough time for the DNS entries to be updated? I realise worldwide propagation may take significantly longer, but all I really need in a short-term outage is for users in the London area to be able to access the URL via its new backup IP address [our server room is in London as are all the administrators/managers who are going to be the ones jumping up and down if they cant access the VPN at 2am!]
Thanks