F5 GTM monitor generic host
Hi If we have two site GTM. Site A and Site B. From my understanding. If we have generic host reside in Site B. GTM site B will try to monitor it. And GTM Site A will get result of monitor from GTM site B via iquery, Am I correct? What happen if site B monitor virtual server in generic host "Online" but site B monitor "Offline" ? and iquery is working fine. Thank you
GTM Continues to Resolve (Generic Host) IP's From Pools That Are Down
Hello All! I have a strange situation and I'm sure we're simply missing something simple here. The initial goal: Configure a WIP for a smtp FQDN with a PROD and DR pool behind it where GTM will resolve only to IP's in the PROD pool until all PROD pool IP's are down, after which is will resolve IP's in the DR pool. The issue: We have a simple WIP with two pools (PROD and DR) behind it set to Global Availability load balancing method. During our testing, we simply disable the services on the PROD pool which triggers the monitor to mark the servers/pool as down. The problem is, even if the GTM marks the pool as down, it will still resolve IP's in the PROD pool. It does resolve to IP's in the DR pool as well, but it flaps back and forth between IP's in both the PROD and DR pools. I'd be happy to provide more info, but this is truly as basic of a config as I can think of. One WIP, two pools of generic hosts yet when one pool goes down, the GTM still answers to IP's in the down pool. Any suggestions are welcome as this is holding us up on putting this into production prior to BCP/DR testing scheduled before the end of the year. :)
generic host monitoring in GTM
a GTM configuration question: I need to configure a wide ip as roundrobin between two generic hosts. The major objective is once one host failed and then only respond the DNS query using another available host. However, it looks GTM cannot monitor the generic hosts (pingable/reachable from the GTM tmsh). Could you please help? Thank you very much.
GTM and Topology
Hi, I am quite new to DNS/GTM stuff so I had no chance yet to dig into how Topology LB works and what can be done. Wonder if such configuration is possible: Setup: Two DC - DC1 and DR1 LDNS in each DC sending request to GTM (LDNS_DC1, LDNS_DR1) Servers in each DC - defined as Generic Host GTM serwing one Wide IP pointing to Servers in both DC I would like to achieve this result: When LDNS_DC1 sends request logic is: If there is any Srv active in DC1 return IP of any (based on RR) If there is no active Srv in DC1 return IP of any active Srv in DR1 (based on RR) When LDNS_DR1 sends request logic is: If there is any Srv active in DR1 return IP of any (based on RR) If there is no active Srv in DR1 return IP of any active Srv in DC1 (based on RR) So depending on which LDNS issued request logic is switched around. Is that possible without iRule using just LB available at Wide IP and Pool level? Side question: Which LB methods will work at all for Generic Host? I guess in this case all is based on analyzing communication between LDNS and GTM (no data that is provided when BIG-IP type of server is used)