Updates scalability in specification.rst

Change-Id: I1cdff23fa46a567a9cc8929c1ce773f0c8b6cddc
diff --git a/specification.rst b/specification.rst
index 2d92d43..cde9dd2 100644
--- a/specification.rst
+++ b/specification.rst
@@ -88,8 +88,21 @@
 
 Scalability
 ===========
-  - (in production) Up to 50k routes, 110k flows, 8 Leaf, 2 Spines, with route optimization enabled
-  - (in pre-production) Up to 120k routes, 250k flows, 8 Leaf, 2 Spines, with route optimization enabled
+Trellis has been tested at the following scale.
+
+In Production
+  - Up to 80k routes (with route optimization)
+  - 170k Flows
+  - 600 direct-attached hosts
+  - 8 leaf switches
+  - 2 spine switches
+
+In Pre-Production
+  - Up to 120k routes (with route optimization)
+  - 250k flows
+  - 600 direct-attached hosts
+  - 8 leaf switches
+  - 2 spine switches
 
 Security
 ========