@staticmethod
    def mtucheck(ifc):
        if ifc.mtu != 1500:
            # a workaround for PhysicalNode GreTap, which has no knowledge of
            # the other nodes/nets
            return "  ip ospf mtu-ignore\n"
        if not ifc.net:
            return ""
        for i in ifc.net.netifs():
            if i.mtu != ifc.mtu:
                return "  ip ospf mtu-ignore\n"
        return ""
Helper to detect MTU mismatch and add the appropriate OSPF
dataset/ETHPy150Open coreemu/core/daemon/core/services/quagga.py/Ospfv2.mtucheck