Forum Discussion
Pilow
Nimbostratus
NimbostratusWhat ports does GTM use when measuring RTT
Hi, I'm trying to configure GTM pools using round trip time load balancing method without using ICMP in case it is blocked by firewall headed to LDNS.
According to documentation, RTT can be measured by using several metrics collection protocols other than ICMP, such as TCP/UDP/DNS_REV/DNS_DOT
https://my.f5.com/manage/s/article/K6480
I've tried some tests by exculding ICMP from metrics collection protocols and choosing TCP/UDP/DNS_REV/DNS_DOT on the selected check box, but it still seems to check with ICMP echo.
I would like to make sure what ports GTM measures RTT when using those protocols so that they can be allowed on firewall.
- Aswin_mk
Cumulonimbus
usually, RTT calculating using ICMP and UDP 53(DNS) traffics in all of the devices who using GTM. Its calculating QOS score, sending traffic to pool members.
