Forum Discussion
NimbostratusSelecting a monitor down the virtual server & pool
When I select any Monitor like TCP or HTTP, suddenly the pool and virtual server become down. As I unselect it the pool and virtual server become online.
gersbahCirrostratus
That would suggest that your bigip is unable to reach the pool members.
Note that in a cluster, while load balanced end user traffic goes through the floating IP, health checks are sent by the local-only IPs of each individual cluster member.
So if there's a firewall, make sure all bigip IPs are allowed.
If that's not it, you can use something like curl directly on the bigip CLI to see what kind of response you get from the pool members, if any.
But that's more interesting for failing http(s) checks. The basic TCP health check failing points towards a very fundamental connectivity issue, like routing, firewall, access list or the service not even running on the pool member.
ZAHIDHASEEBFor your informaation
1- Node created, Pool created, Virtual server created
2- F5 load balancer is able to ping both VLANS (Internal & External) machines and self IPs are assigned on both VLANS
3- External machine is able to ping Virtual Server
4- internal machine hosted a simple web and access/work locally
5 Firewall is disabled on internal and external VLANS machines and there is no firewall between clients & F5
6- I am even able to telnet VS
So no connectivity issue and http service on server. I followed below sample scenario.
https://f5-agility-labs-adc.readthedocs.io/en/latest/class3/module2/lab2.html
Islam_Nadim1Cirrus
Can you share your configuration for the VS, Pool and Health Monitor?
Also, please share the output of curl -vvvk http://<pool-member-ip> or curl -vvvk https://<pool-member-ip> (depending on the port the pool members are listening on.
- ZAHIDHASEEB
- Islam_Nadim1
Have you tried to capture traffic on the destination?