diff --git a/tcp_tests/templates/virtual-mcp-sl-os/underlay.yaml b/tcp_tests/templates/virtual-mcp-sl-os/underlay.yaml
index 4b4ce8e..c2f7bd1 100644
--- a/tcp_tests/templates/virtual-mcp-sl-os/underlay.yaml
+++ b/tcp_tests/templates/virtual-mcp-sl-os/underlay.yaml
@@ -152,7 +152,7 @@
             address_pool: external-pool01
             dhcp: true
             forward:
-              mode: nat
+              mode: route
 
 
         group_volumes: