X-Git-Url: https://git.openstreetmap.org./chef.git/blobdiff_plain/74ccc507f7e26531cee96cc31115a4f50a4fed72..76212535d5c3bd8a789a1c8e1fe237710b169e59:/roles/ucl.rb

diff --git a/roles/ucl.rb b/roles/ucl.rb
index 27064ea23..eb3dfd1cd 100644
--- a/roles/ucl.rb
+++ b/roles/ucl.rb
@@ -19,6 +19,15 @@ default_attributes(
         }
       }
     }
+  },
+  :sysctl => {
+    :blackhole => {
+      :comment => "Force TCP level MTU probing because of known ICMP blackhole at UCL",
+      :parameters => {
+        "net.ipv4.tcp_mtu_probing" => "2",
+        "net.ipv4.tcp_base_mss" => "1024"
+      }
+    }
   }
 )