Collection API CREATE creates name like '_shard1_replica1'

[Sandeep Khanzode]

Hi,
I uploaded (upconfig) config (schema and solrconfig XMLs) to Zookeeper and then 
linked (linkconfig) the confname to a collection name.
When I attempt to create a collection using the API like this 
.../solr/admin/collections?action=CREATE&name=abc&numShards=1&collection.configName=abc
  ... it creates a collection core named abc_shard1_replica1 and not simply abc.
What is missing? 
SRK