Update network usage info

faq/README.md

@@ -4,7 +4,7 @@
 Follow instructions for registering in [MetaCentrum Cloud](/register/README.md).
 
 ## How do I migrate from legacy platforms?
-Follow instructions for [migrating from CESMET-MetaCloud or OStack ICS MUNI](/migrate/README.md).
+Follow instructions for [migrating from CESNET-MetaCloud or OStack ICS MUNI](/migrate/README.md).
 
 ## Where do I report a problem?
 First, try searching the documentation for an answer to your problem. If that does not yield results, open a
@@ -12,3 +12,15 @@ ticket with [cloud@metacentrum.cz](mailto:cloud@metacentrum.cz). When contacting
 include your *username* (upper right corner of the web interface) and *domain* with
 active *project* (upper left corner of the web interface) as well as a description of
 your problem and/or an error message if available.
+
+## What networks I can use to access my instances?
+Personal projects can allocate floating IPs from *public-muni-147-251-124* and *private-muni-10-16-116*.
+Group projects can currently allocate floating IPs from *public-cesnet-78-128-251* and *private-muni-10-16-116*.
+IP addresses from *public-muni-147-251-124* allocated by users to group projects are released daily, so we encourage
+using only *public-cesnet-78-128-251* and *private-muni-10-16-116* for group projects.
+
+## Issues with network stability in Docker
+OpenStack instances use 1442 bytes MTU (maximum transmission unit) instead of standard 1500 bytes MTU. Instance itself is
+able to setup correct MTU with its counterpart via Path MTU Discovery. Docker needs MTU setup explicitly. Refer documentation for setting up
+1442 MTU in [Docker](https://docs.docker.com/v17.09/engine/userguide/networking/default_network/custom-docker0/) or
+[Kubernetes](https://docs.projectcalico.org/v3.5/usage/configuration/mtu).

quick-start/README.md

@@ -111,6 +111,18 @@ For details, refer to [the official documentation](https://docs.openstack.org/ho
 
 For details, refer to [the official documentation](https://docs.openstack.org/horizon/rocky/user/launch-instances.html).
 
+## Setup Router gateway (Required for Group projects)
+Completing [Create Virtual Machine Instance](/quick-start/#create-virtual-machine-instance) created instance connected
+to software defined network represented by auto-allocated private network, subnet and router. Router has by default gateway address
+from External Network **public-muni-147-251-124**, which is for non-production only and is released daily. For persistent gateway address
+follow these steps:
+
+1. In **Network > Routers**, click the **Set Gateway** button next to auto_allocated_router.
+
+2. From list of External Network choose **public-cesnet-78-128-251** or **private-muni-10-16-116**
+
+Router is setup with persistent gateway.
+
 ## Associate Floating IP
 
 To make an instance accessible from external networks (e.g., The Internet), a so-called Floating IP Address has to be
@@ -122,7 +134,13 @@ associated with it.
    <div style="border-width:0;border-left:5px solid #b8d6f4;background-color:rgba(228,240,251,0.3);margin:20px 0;padding:10px 20px;font-size:15px;">
      <strong>Notice:</strong><br/>
      When picking an IP pool from which to allocate a floating IP address, please, keep in mind that you have to allocate
-     an address in the pool connected to your virtual router. For automatically allocated routers, this means `public-muni-147-251-124`.
+     an address in the pool connected to your virtual router. For automatically allocated routers, this means <strong>public-muni-147-251-124</strong>.
+   </div>
+
+   <div style="border-width:0;border-left:5px solid #ff0000;background-color:rgba(255, 0, 0, 0.2);margin:20px 0;padding:10px 20px;font-size:15px;">
+     <strong>Warning:</strong><br/>
+     Group projects can persistently allocate IPs only from <strong>public-cesnet-78-128-251</strong> or <strong>private-muni-10-16-116</strong> networks.
+     IPs from <strong>public-muni-147-251-124</strong> allocated to Group projects will be released daily.
    </div>
 
    <div style="border-width:0;border-left:5px solid #b8d6f4;background-color:rgba(228,240,251,0.3);margin:20px 0;padding:10px 20px;font-size:15px;">