GTM is nothing but works as a DNS for a corporate network , If previously we have legacy DNS server in our environment, Then what advantages does GTM brings compares to DNS server
Complementing what Kevin wrote, with BIG-IP DNS you have the same benefits of the traditional DNS and much more in terms of availability, performance, security and management capabilities:
Traditional DNS (BIND & Microsoft DNS):
F5 BIG-IP DNS:
A few of the outstanding benefits would be the ability to actually monitor and load balance the IP addresses being resolved. A few examples:
Load balancing: Hand out 126.96.36.199 and 188.8.131.52 evenly, or 184.108.40.206 twice as often as 220.127.116.11 if the servers are different platforms / capacities. Hand out 18.104.22.168 to customers in Japan and 22.214.171.124 to customers in America.
DDoS protection: GTM (F5 TMOS) offers advanced DDoS protection.
This is a great intro article:
Hope this is helpful!
We use Global Availability in our environment for any domains that are used for Disaster Recovery. Our GTMs can determine availability of LTM objects and should everything go offline in our primary data center, we can direct traffic to our alternate data center.