[PATCH v3] Documentation: boards: sandbox: some extra steps requires for DHCP network configuration for sandbox on the host OS

[Neeraj Pal <neerajpal09@gmail.com>]

Signed-off-by: Neeraj Pal <neerajpal09@gmail.com>
---
 Documentation/boards/sandbox.rst | 65 ++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)

diff --git a/Documentation/boards/sandbox.rst b/Documentation/boards/sandbox.rst
index e9e518365..2272dc32c 100644
--- a/Documentation/boards/sandbox.rst
+++ b/Documentation/boards/sandbox.rst
@@ -74,3 +74,68 @@ Available sandbox invocation options include:
 
 To terminate barebox and return to the calling shell, the poweroff command is
 suitable.
+
+Network configuration
+---------------------
+
+While running the sandbox, the following steps are required
+
+* On host
+
+  * virbr0: virtual bridge interface created by Qemu (easy method)
+
+  * if Qemu virtual bridge (virbr0) is not available then manually create and configure one bridge like "br0"
+
+    .. code-block:: console
+
+        $ ip link show
+        4: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default qlen 1000
+            link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff
+        6: barebox: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
+            link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff
+
+    .. code-block:: console
+
+        $ install iproute2 package, if not installed: sudo apt-get install iproute2
+        $ sudo ip l s dev barebox up
+        $ sudo ip l s barebox master virbr0
+        $ sudo dhclient -v virbr0
+
+* On Sandbox
+
+    .. code-block:: console
+
+        barebox@Sandbox:/ devinfo eth0
+        Parent: tap0
+        Parameters:
+          ethaddr: 00:00:00:00:00:00 (type: MAC)
+          gateway: 0.0.0.0 (type: ipv4)
+          ipaddr: 0.0.0.0 (type: ipv4)
+          linux.bootargs:  (type: string)
+          linux.devname:  (type: string)
+          mode: dhcp (type: enum) (values: "dhcp", "static", "disabled")
+          netmask: 0.0.0.0 (type: ipv4)
+          serverip:  (type: string)
+
+    .. code-block:: console
+
+        barebox@Sandbox:/ dhcp eth0
+        WARNING: eth0: No MAC address set. Using random address c2:2c:a1:17:b8:47
+        T eth0: DHCP client bound to address 192.168.122.21
+        barebox@Sandbox:/ ping google.com
+        PING google.com (172.217.167.46)
+        host google.com is alive
+
+    .. code-block:: console
+
+        barebox@Sandbox:/ devinfo eth0
+        Parent: tap0
+        Parameters:
+          ethaddr: c2:2c:a1:17:b8:47 (type: MAC)
+          gateway: 192.168.122.1 (type: ipv4)
+          ipaddr: 192.168.122.21 (type: ipv4)
+          linux.bootargs:  (type: string)
+          linux.devname:  (type: string)
+          mode: dhcp (type: enum) (values: "dhcp", "static", "disabled")
+          netmask: 255.255.255.0 (type: ipv4)
+          serverip: 192.168.122.1 (type: string)
-- 
2.25.1


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