diff --git a/bbsim/values.yaml b/bbsim/values.yaml
index 4983744..8d589ed 100644
--- a/bbsim/values.yaml
+++ b/bbsim/values.yaml
@@ -25,6 +25,7 @@
 # CLI switches passed to bbsim
 olt_id: 0
 nni: 1
+nni_speed: 10000 # in Mbps (= 1Gbps)
 pon: 1
 onu: 1
 uni: 4