playbook/ors: replace MME init script with playbook

MME init script installs unwanted ip6tables rules
which breaks re6st

playbook/roles/ors/files/init-mme

 #!/bin/bash
-
-AMARISOFT_PATH="/opt/amarisoft/$(ls -1 /opt/amarisoft | grep "^v[0-9]\{4\}-[0-9]\{2\}-[0-9]\{2\}.*[0-9]*$" | sort | tail -n1)"
-export PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:$PATH"
-
-$AMARISOFT_PATH/mme/lte_init.sh;
+# Obsolete, kept for backwards compatibility

playbook/roles/ors/tasks/main.yml

@@ -152,6 +152,15 @@
   - name: Configure IPv6 forwarding
     lineinfile: dest=/etc/sysctl.conf regexp="^net.ipv6.conf.all.forwarding=(.*)" line="net.ipv6.conf.all.forwarding=1" state=present
 
+  - name: Improve network stack behaviour (for core network)
+    lineinfile: dest=/etc/sysctl.conf regexp="^net.ipv4.tcp_congestion_control=(.*)" line="net.ipv4.tcp_congestion_control=bbr" state=present
+
+  - name: Improve network stack behaviour (for core network)
+    lineinfile: dest=/etc/sysctl.conf regexp="^net.core.rmem_max=(.*)" line="net.core.rmem_max=50000000" state=present
+
+  - name: Improve network stack behaviour (for core network)
+    lineinfile: dest=/etc/sysctl.conf regexp="^net.core.wmem_max=(.*)" line="net.core.wmem_max=5000000" state=present
+
   - name: Redirect 53 to 5353
     ansible.builtin.iptables:
       chain: PREROUTING