[idu]: Update /etc/network/interfaces

On eth1 we should also use a network from the 172.16 block rather than
the 10.23 that we used on the sysmoBSC

Also, we now use 172.16.4.0/23 natively on the bridged onboard network,
this is a temporary measure so existing JBs will still connect and get
an IP address before their software is updated to use VLAN6.  After they
(and all APs, BTSs, etc.) have migrated, the 172.16.4.0/23 can be
removed.

recipes-bsp/netbase/init-ifupdown_sysmocom.inc

@@ -1,6 +1,6 @@
 SYSMOCOM := "${@os.path.dirname(bb.data.getVar('FILE', d, True))}"
 FILESEXTRAPATHS_prepend := "${SYSMOCOM}/netbase-${PV}:${SYSMOCOM}/netbase:"
-PRINC = "7"
+PRINC = "8"
 
 # systemd does not look at /etc/rcS.d for the script. Make sure
 # there is a symlink available

recipes-bsp/netbase/netbase/sysmocom-idu/interfaces

@@ -12,9 +12,9 @@ iface eth0 inet dhcp
 #eth1 is our admin interface and will provide dhcp to clients
 auto eth1
 iface eth1 inet static
-	address 10.23.24.1
+	address 172.16.6.1
 	netmask 255.255.255.0
-	network 10.23.24.0
+	network 172.16.6.0
 
 # eth2 is attached to the IDU-internal SOB-JB02-SW
 auto eth2
@@ -26,9 +26,12 @@ iface eth2 inet manual
 # * we use the bridging code so we can run mstpd and become the root bridge
 
 auto br0
-iface br0 inet manual
+iface br0 inet static
 	bridge_ports eth2
 	bridge_maxwait 0
+	address 172.16.4.1
+	netmask 255.255.254.0
+	network 172.16.4.0
 
 # VLAN 6: management VLAN
 auto br0.6