GTM nameserver records not reponding

Firstly, I note that you're running 11.5.1, since it has GUI bug that displays "DNS >> Zones:Zones >> cavali.com.pe" when it should say "DNS >> Zones:ZoneRunner:Zone List >> Properties : cavali.com.pe". In 11.5.1, the breadcrumbs incorrectly link to DNS Express (Zones:Zones), and should link to Zonerunner (Zones:ZoneRunner)

The NS records for a zone need to be sitting in the parent zone, as well as in the actual zone file, but for different reasons. The parent zone is for delegation, so that it can send the referral data. The NS data in the zone itself is used to allow the nameserver to know that it is authoritative for that zone.

If I do a dig +trace on this, it looks like you've got the delegation NS records working - ns2.telmex.net.pe does give me a referral to both cvlbal02 and cvlbal01 when I ask about gtm.cavali.com.pe:

dig +trace gtm.cavali.com.pe

 

gtm.cavali.com.pe.      7200    IN      NS      cvlbal02.cavali.com.pe.
gtm.cavali.com.pe.      7200    IN      NS      cvlbal01.cavali.com.pe.
;; Received 124 bytes from 200.24.191.1053(ns2.telmex.net.pe) in 1184 ms

cavali.com.pe.          60      IN      SOA     cvlbal01.cavali.com.pe. hostmaster.cvlbal01.cavali.com.pe. 101 10800 3600 604800 60
;; Received 102 bytes from 190.223.42.16353(cvlbal01.cavali.com.pe) in 393 ms

The two GTMs are cvlbal01.cavali.com.pe (190.223.42.163), and cvlbal02.cavali.com.pe (200.37.97.51)

But if I ask those GTMs for data about that zone, they have nothing to give. It doesn't look like you've created a zone for gtm.cavali.com.pe, so when I send queries to the GTMs for that zone, it doesn't match anything, and you get an empty response.

Note also that when you create a wideip, it will look for the best matching existing zone, and won't create a new one if one appears to already exist, so if you create a wideip as test.gtm.example.org, it will put it into example.org, rather than create a new zone for gtm.example.org.

So in this case, you'll need to manually create the gtm.cavali.com.pe zone in zonerunner, and then create your wideips (the first time they're created, or when pools are changed, they populate the zone file)

$ dig -t NS gtm.cavali.com.pe

;; QUESTION SECTION:
;gtm.cavali.com.pe.             IN      NS

;; AUTHORITY SECTION:
cavali.com.pe.          2610    IN      NS      ns2.telmex.net.pe.
cavali.com.pe.          2610    IN      NS      ns1.telmex.net.pe.

;; ADDITIONAL SECTION:
ns2.telmex.net.pe.      1857    IN      A       200.24.191.10
ns1.telmex.net.pe.      1857    IN      A       200.62.191.10

The Manual Chapter: Delegating DNS Traffic to BIG-IP GTM may help you, though it assumes that your parent zone is on another nameserver, which is different from your scenario.