diff --git a/tcp_tests/templates/cookied-bm-contrail40/underlay.yaml b/tcp_tests/templates/cookied-bm-contrail40/underlay.yaml
index 409842b..ba82288 100644
--- a/tcp_tests/templates/cookied-bm-contrail40/underlay.yaml
+++ b/tcp_tests/templates/cookied-bm-contrail40/underlay.yaml
@@ -12,6 +12,7 @@
 {% set HOSTNAME_CMP002 = os_env('HOSTNAME_CMP002', 'cmp002.' + DOMAIN_NAME) %}
 {% set HOSTNAME_CMP003 = os_env('HOSTNAME_CMP003', 'cmp003.' + DOMAIN_NAME) %}
 {% set HOSTNAME_KVM04 = os_env('HOSTNAME_KVM04', 'kvm04.' + DOMAIN_NAME) %}
+{% set HOSTNAME_CTL01 = os_env('HOSTNAME_CTL01', 'ctl01.' + DOMAIN_NAME) %}
 
 {% set ETH1_IP_ADDRESS_CFG01 = os_env('ETH1_IP_ADDRESS_CFG01', '172.16.49.66') %}
 {% set ETH0_IP_ADDRESS_KVM01 = os_env('ETH0_IP_ADDRESS_KVM01', '172.16.49.67') %}