When running Service Mapping with Netscaler VPX you may notice that the map is not progressing past the initial entrypoint. When looking at the CI record you notice missing data for some related fields (LB Services, NICs, etc)
Release or Environment
There looks to be an issue on the Netscaler end for VPX versions below 12.1 were the VPX does not properly respond in order when multiple SNMP queries are made to the Netscaler in bulk, which causes Discovery to fail for gathering certain fields.
Upgrade Netscaler VPX to 12.1+